JP2003043354A - Electronic imaging device - Google Patents

Electronic imaging device

Info

Publication number
JP2003043354A
JP2003043354A JP2002131458A JP2002131458A JP2003043354A JP 2003043354 A JP2003043354 A JP 2003043354A JP 2002131458 A JP2002131458 A JP 2002131458A JP 2002131458 A JP2002131458 A JP 2002131458A JP 2003043354 A JP2003043354 A JP 2003043354A
Authority
JP
Japan
Prior art keywords
group
lens
optical path
object side
image pickup
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002131458A
Other languages
Japanese (ja)
Inventor
Shinichi Mihara
伸一 三原
Koichi Konishi
宏一 小西
Toyoji Hanzawa
豊治 榛澤
Masahito Watanabe
正仁 渡邉
Atsujirou Ishii
敦次郎 石井
Tetsuei Takeyama
哲英 武山
Fumiyoshi Imamura
文美 今村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP2002131458A priority Critical patent/JP2003043354A/en
Publication of JP2003043354A publication Critical patent/JP2003043354A/en
Priority to EP12153251.9A priority patent/EP2450731B1/en
Priority to PCT/JP2003/003864 priority patent/WO2003085438A1/en
Priority to EP12153258.4A priority patent/EP2450732B1/en
Priority to CNB038079542A priority patent/CN100337140C/en
Priority to EP12153263.4A priority patent/EP2450733B1/en
Priority to EP03715536A priority patent/EP1494053B1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Structure And Mechanism Of Cameras (AREA)
  • Studio Devices (AREA)
  • Lenses (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an electronic imaging device, whose thickness in the depth direction is very small and which adopts the type of an optical system, capable of overcoming constraints concerning the movement of a moving group when varying power, while maintaining high specification and performance. SOLUTION: This electronic imaging device has an optical path bending zoom optical system, which includes a 1-1st group G-1 constituted of a negative lens group and a catoptric element P for bending an optical path, a 1-2nd group G1-2 including one positive lens and a 2nd group G2 having positive refractive power, in the order starting from the object side and where the 2nd group G2 moves only to the object side in the case of varying power from a wide-angle end to a telephoto end, and the electronic imaging device I arranged on the image side of the zoom optical system.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、光路折り曲げズー
ム光学系を有する薄型電子撮像装置に関し、特に、ズー
ムレンズ等の光学系部分の工夫により奥行き方向の薄型
化を実現した、ビデオカメラやデジタルカメラを始めと
する電子撮像装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin electronic image pickup device having an optical path bending zoom optical system, and more particularly to a video camera or a digital camera which is made thinner in the depth direction by devising an optical system portion such as a zoom lens. And an electronic image pickup device.

【０００２】[0002]

【従来の技術】近年、銀塩３５ｍｍフィルム（通称ライ
カ版）カメラに代わる次世代カメラとして、デジタルカ
メラ（電子カメラ）が注目されてきている。さらに、そ
れは業務用高機能タイプからポータブルな普及タイプま
で幅広い範囲でいくつものカテゴリーを有するようにな
ってきている。2. Description of the Related Art In recent years, a digital camera (electronic camera) has been attracting attention as a next-generation camera to replace a silver salt 35 mm film (commonly called Leica version) camera. Furthermore, it has come to have several categories in a wide range from high-performance type for business use to portable popular type.

【０００３】本発明においては、特にポータブルな普及
タイプのカテゴリーに注目し、高画質を確保しながら奥
行きの薄いビデオカメラ、デジタルカメラを実現する技
術を提供することをねらっている。In the present invention, attention is paid particularly to the portable popular type category, and it is aimed to provide a technique for realizing a video camera and a digital camera having a small depth while ensuring high image quality.

【０００４】カメラの奥行き方向を薄くするのに最大の
ネックとなっているのは、光学系、特にズームレンズ系
の最も物体側の面から撮像面までの厚みである。最近で
は、撮影時に光学系をカメラボディ内からせり出し、携
帯時に光学系をカメラボディ内に収納する、いわゆる沈
胴式鏡筒を採用することが主流になっている。しかしな
がら、使用するレンズタイプやフィルターによって光学
系沈胴時の厚みが大きく異なる。特にズーム比やＦ値等
の仕様を高く設定するには、最も物体側のレンズ群が正
の屈折力を有するいわゆる正先行型ズームレンズは、各
々のレンズエレメントの厚みやデッドスペースが大き
く、沈胴してもたいして厚みが薄くならない（特開平１
１−２５８５０７号）。負先行型で特に２乃至３群構成
のズームレンズはその点有利であるが、群内構成枚数が
多かったり、エレメントの厚みが大きかったり、最も物
体側のレンズが正レンズの場合は沈胴しても薄くならな
い（特開平１１−５２２４６号）。The biggest bottleneck in thinning the depth direction of the camera is the thickness from the most object side surface to the image pickup surface of the optical system, especially the zoom lens system. Recently, it has become mainstream to employ a so-called collapsible lens barrel in which the optical system is pushed out of the camera body at the time of shooting and is housed in the camera body when carrying. However, the thickness of the optical system when retracted greatly varies depending on the lens type and filter used. In order to set specifications such as zoom ratio and F-number to be high, a so-called positive-leading type zoom lens, in which the lens unit closest to the object side has a positive refractive power, has a large thickness and dead space of each lens element, which causes a collapse. Even if the thickness does not become too thin
1-258507). The negative-preceding type zoom lens having a 2 to 3 group structure is particularly advantageous in that respect. However, if the number of lens elements in the group is large, or the element thickness is large, or if the lens closest to the object side is a positive lens, it should be retracted. Does not become thin (JP-A-11-52246).

【０００５】現在知られている中で、電子撮像素子用に
適し、かつ、ズーム比、画角、Ｆ値等含めた結像性能が
良好で、沈胴厚を最も薄くできる可能性を有するものの
例として、特開平１１−１９４２７４号、特開平１１−
２８７９５３号、特開２０００−９９９７等のものがあ
る。An example of a currently known one which is suitable for an electronic image pickup device, has good imaging performance including zoom ratio, angle of view, F value, etc. and has the possibility of making the collapsed thickness the thinnest. As JP-A-11-194274, JP-A-11-194274
289553, JP-A 2000-9997 and the like.

【０００６】第１群を薄くするには、入射瞳位置を浅く
するのがよいが、そのためには第２群の倍率を高くする
ことになる。一方、そのために第２群の負担が大きくな
り、それ自身を薄くすることが困難になるばかりでなく
収差補正の困難さや製造誤差の効きが増大し好ましくな
い。薄型化小型化を実現するには、撮像素子を小さくす
ればよいが、同じ画素数とするためには画素ピッチを小
さくする必要があり、感度不足を光学系でカバーしなけ
ればならない。回折の影響も然りである。In order to make the first lens unit thinner, it is preferable to make the entrance pupil position shallower, but for that purpose, the magnification of the second lens unit is increased. On the other hand, this increases the burden on the second lens unit, making it difficult to make itself thin, and it is also not preferable because it becomes difficult to correct aberrations and the effectiveness of manufacturing errors increases. In order to realize thinning and miniaturization, it is sufficient to make the image pickup device small, but in order to make the number of pixels the same, it is necessary to make the pixel pitch small, and it is necessary to cover the lack of sensitivity with an optical system. The effect of diffraction is no different.

【０００７】また、奥行の薄いカメラボディにするため
に、合焦時のレンズ移動を前群ではなくいわゆるリアフ
ォーカスが駆動系のレイアウト上有効である。すると、
リアフォーカスを実施したときの収差変動が少ない光学
系を選択する必要が出てくる。もう１つの薄型化の手段
として、光学系の光路をミラー等で折り曲げる方法があ
る。この場合、折り曲げのためのスペース上変倍のため
のレンズ移動にかなりの制約が発生する。In order to make the camera body with a small depth, the so-called rear focus is effective for the lens movement during focusing instead of the front group in view of the layout of the drive system. Then,
It becomes necessary to select an optical system in which aberration variation is small when rear focus is performed. Another thinning method is to bend the optical path of the optical system with a mirror or the like. In this case, there are considerable restrictions on the movement of the lens for zooming due to the space required for bending.

【０００８】[0008]

【発明が解決しようとする課題】本発明は従来技術のこ
のような現状に鑑みてなされたものであり、その目的
は、光学系の光路（光軸）をミラー等の反射光学素子で
折り曲げたリアフォーカスのズームレンズを採用し、高
い仕様、性能を維持しつつ変倍時の移動群の移動に関す
る制約条件を克服できる光学系のタイプを採用して、奥
行方向が極めて薄い電子撮像装置を提供することであ
る。SUMMARY OF THE INVENTION The present invention has been made in view of such a state of the art, and an object thereof is to bend an optical path (optical axis) of an optical system with a reflective optical element such as a mirror. Adopting a rear-focus zoom lens, and adopting an optical system type that can overcome the restrictions on the movement of the moving group during zooming while maintaining high specifications and performance, providing an electronic imaging device with an extremely thin depth direction It is to be.

【０００９】[0009]

【課題を解決するための手段】上記目的を達成するため
に、本発明の電子撮像装置は、広角端から望遠端に変倍
する際に物体側にのみ移動する群を少なくとも１つ含
み、変倍時に可動な全ての群の最も物体側のレンズより
も物体側に光路を折り曲げるための反射光学素子を少な
くとも１つ含む光路折り曲げズーム光学系及びその像側
に配置された電子撮像素子を有することを特徴とするも
のである。In order to achieve the above object, an electronic image pickup apparatus of the present invention includes at least one group that moves only to the object side when zooming from a wide-angle end to a telephoto end. An optical path bending zoom optical system including at least one reflective optical element for bending the optical path toward the object side of the lens closest to the object side in all the groups movable at the time of zooming, and an electronic image pickup element arranged on the image side thereof. It is characterized by.

【００１０】以下に、本発明において上記構成をとる理
由と作用を説明する。Hereinafter, the reason and operation of adopting the above configuration in the present invention will be described.

【００１１】本発明においては、広角端から望遠端に変
倍する際に物体側にのみ移動する群を少なくとも１つ含
み、変倍時に可動な全ての群の最も物体側のレンズより
も物体側に光路を折り曲げるための反射光学素子を少な
くとも１つ含む光路折り曲げズーム光学系を採用した。
レンズ系入射面を物体側に向けなおかつ奥行を薄くする
には、光路折り曲げを撮影光学系の出来るだけ物体側の
位置で、しかも、光線高が低い空気間隔部で実施するの
が好ましい。また、ズームやフォーカス駆動系を複雑化
しないために、移動群は折り曲げ位置よりも像側とする
のがよい。折り曲げスペースを極力小さくするために
は、折り曲げ部近傍での結像に寄与する全ての光線高が
低いのがよいことを考えると、折り曲げ部の存在する最
も物体側のレンズから変倍時に可動な群の直前までの部
分系の合成焦点距離が負であることが望ましい。In the present invention, at least one group that moves only to the object side when zooming from the wide-angle end to the telephoto end is included, and all the groups that are movable during zooming are closer to the object side than the lens closest to the object side. In addition, an optical path bending zoom optical system including at least one reflective optical element for bending the optical path is adopted.
In order to make the entrance surface of the lens system toward the object side and make the depth thin, it is preferable to perform the optical path bending at a position on the object side of the photographing optical system as much as possible and at an air gap portion where the ray height is low. Further, in order not to complicate the zoom or focus drive system, it is preferable that the moving group is located on the image side of the bending position. In order to make the bending space as small as possible, considering that it is preferable that the height of all the rays that contribute to image formation in the vicinity of the bending portion is low, it is possible to move from the lens on the most object side where the bending portion exists to the one for zooming. It is desirable that the composite focal length of the subsystems just before the group is negative.

【００１２】折り曲げズーム光学系として相応しいレン
ズ構成を具体的に述べると、物体側より順に、負レンズ
群と光路折り曲げのための反射光学素子とにて構成され
た第１−１群、正レンズを１枚含む第１−２群、正の屈
折力を有する第２群を含み、広角端から望遠端に変倍す
る際は前記第２群が物体側にのみ移動するタイプであ
る。A lens structure suitable for a folding zoom optical system will be described in detail. A first lens group 1-1 and a positive lens group, which are composed of a negative lens group and a reflective optical element for bending an optical path, are arranged in order from the object side. This is a type that includes a first-second lens group including one lens and a second lens group having a positive refractive power, and the second lens group moves only to the object side when zooming from the wide-angle end to the telephoto end.

【００１３】折り曲げズーム光学系として相応しいもう
１つのレンズ構成を具体的に述べると、物体側より順
に、入射面、射出面の少なくとも一方が凹面である光路
折り曲げのための反射光学素子であるプリズムを含む第
１−１群、正レンズを１枚含む第１−２群、正の屈折力
を有する第２群を含み、広角端から望遠端に変倍する際
は前記第２群が物体側へ単調に移動するようなタイプで
ある。Another lens structure suitable for a bending zoom optical system will be described in detail. A prism, which is a reflecting optical element for bending an optical path, in which at least one of an entrance surface and an exit surface is a concave surface, is arranged in order from the object side. Including the 1-1st group including, the 1-2nd group including one positive lens, and the second group having a positive refracting power, the second group is moved to the object side when zooming from the wide-angle end to the telephoto end. It is a type that moves monotonously.

【００１４】この場合、何れのタイプでも、反射光学素
子の反射面の直前の屈折面から反射面の直後の屈折面ま
での光軸上の空気換算長ｄを以下のようにするのがよ
い。In this case, in any type, it is preferable that the air-converted length d on the optical axis from the refracting surface immediately before the reflecting surface of the reflective optical element to the refracting surface immediately after the reflecting surface is as follows.

【００１５】（ａ） ０．５＜ｄ／Ｌ＜２．１ ただし、Ｌは電子撮像素子の有効撮像領域（略矩形）の
対角長。(A) 0.5 <d / L <2.1 where L is the diagonal length of the effective image pickup area (substantially rectangular) of the electronic image pickup device.

【００１６】この条件（ａ）の上限値の２．１を越える
と、光学系が大きくなりすぎる。下限値の０．５を越え
ると、画像周辺部の結像に寄与する光束が満足に像面に
達しないし、あるいはゴーストが発生しやすい。When the upper limit of 2.1 of the condition (a) is exceeded, the optical system becomes too large. If the lower limit of 0.5 is exceeded, the light flux that contributes to image formation in the peripheral portion of the image does not reach the image plane satisfactorily, or a ghost is likely to occur.

【００１７】なお、光路を折り曲げる方向の画角が２５
°±３°の範囲内の場合、約１９°±３°の範囲内の場
合、それぞれ以下の範囲がよい。The angle of view in the direction in which the optical path is bent is 25.
Within the range of ± 3 °, and within the range of about 19 ° ± 3 °, the following ranges are preferable.

【００１８】（ａ−１） ０．８＜ｄ／Ｌ＜１．９ （ａ−２） ０．５＜ｄ／Ｌ＜１．５ さらに、次のようにすればより好ましい。(A-1) 0.8 <d / L <1.9 (A-2) 0.5 <d / L <1.5 Furthermore, the following is more preferable.

【００１９】（ａ' −１）０．９＜ｄ／Ｌ＜１．８ （ａ' −２）０．６＜ｄ／Ｌ＜１．４ なお、何れのタイプも近軸的屈折力配置を適切にするた
めに反射面を平面以外で構成してもよい。また、反射面
の形状を自由に変えることのできる制御系を設け、それ
によって変倍の際に発生する焦点位置や収差の変動を補
正したり、フォーカスをしたり、変倍をするために形状
制御可能な形状可変ミラーにするのがより好ましい。(A'-1) 0.9 <d / L <1.8 (a'-2) 0.6 <d / L <1.4 In both types, the paraxial refractive power arrangement is used. The reflecting surface may be configured to be other than planar for the sake of suitability. In addition, a control system that can freely change the shape of the reflecting surface is provided, so that the shape for correcting the focus position and aberration fluctuations that occur during zooming, focusing, and zooming More preferably, it is a controllable deformable mirror.

【００２０】なお、これとは別に、反射光学素子をプリ
ズム平面部に平凹レンズを接合する等して構成してもよ
い。歪曲補正のレベルと電子撮像装置の目標サイズとの
バランスの関係から、最も物体側にパワーの弱い正レン
ズを付加してもよい。その場合は、第１−２群はなくて
もよい。Alternatively, the reflective optical element may be constructed by joining a plano-concave lens to the flat surface of the prism. A positive lens having the weakest power may be added to the most object side in view of the balance between the level of distortion correction and the target size of the electronic image pickup apparatus. In that case, the first-second group may not be provided.

【００２１】これら２つのズームタイプについては、そ
れぞれの最終群は非球面を有する単レンズにて構成する
のがよい。歪曲収差、非点収差、コマ収差等、軸外収差
の補正には大変効果がある。このレンズによりそれより
物体側にて発生する収差をキャンセルしている訳である
から、フォーカス等によって動かすと収差のバランスを
崩してしまう。したがって、最終群は固定とした方がよ
い。For these two zoom types, it is preferable that each final lens group be composed of a single lens having an aspherical surface. It is very effective in correcting off-axis aberrations such as distortion, astigmatism, and coma. Since this lens cancels the aberration generated on the object side of the lens, if the lens is moved by focusing or the like, the aberration balance is lost. Therefore, the final group should be fixed.

【００２２】また、フォーカスを実施する群としては、
第１群は折り曲げ系であり相応しくないので、最終群を
除く第２群以降の群で実施するのがよい。特に、フォー
カスによる焦点距離や収差の変動が少ない最終群から物
体側に２番目の群を用いてフォーカスを行うのがよい。
この場合、より近距離側への合焦は繰り出す方向とな
る。さらに、フォーカスを行うために、最終群から物体
側に２番目の群と３番目の群の望遠端での無限遠物点合
焦時の光軸上空気間隔ＤFTが以下の条件式を満足するの
がよい。Further, as a group for performing focusing,
Since the first group is a bending system and is not suitable, it is preferable to carry out the second and subsequent groups except the final group. In particular, it is preferable to use the second group from the final group, which has less variation in focal length and aberration due to focusing, to the object side for focusing.
In this case, focusing on the closer distance side is in the direction of extension. Further, in order to perform focusing, the air distance D FT on the optical axis when focusing on the object point at infinity at the telephoto end of the second group and the third group from the final group satisfies the following conditional expression. Good to do.

【００２３】（ｂ） ０．１＜ＤFT／ｆT ＜１．５ ただし、ｆT は望遠端での無限遠物点合焦時の全系焦点
距離である。(B) 0.1 <D FT / f T <1.5 where f T is the focal length of the entire system when focusing on an object point at infinity at the telephoto end.

【００２４】この条件（ｂ）の上限の１．５を越える
と、ズーム比の確保が困難となり、下限値の０．１を越
えると、フォーカス可能距離レンジを十分にとることが
できない。If the upper limit of 1.5 of this condition (b) is exceeded, it will be difficult to secure a zoom ratio, and if the lower limit of 0.1 is exceeded, the focusable distance range will not be sufficient.

【００２５】なお、次のようにすればより好ましい。The following is more preferable.

【００２６】（ｂ' ） ０．２＜ＤFT／ｆT ＜１ さらに、次のようにすればなお好ましい。(B ′) 0.2 <D FT / f T <1 Furthermore, the following is more preferable.

【００２７】 （ｂ" ） ０．２５＜ＤFT／ｆT ＜０．８ 上記の２つのズームタイプは、第２群の像側に正の屈折
力を有する第３群を含み、広角端から望遠端に変倍する
際は第２群と第３群が相対的間隔を変えながら移動する
ようなズーム形式にするとよい。この方式は、スペース
を効率良く使って変倍による焦点位置補正を行いながら
高い変倍率を稼ぐことができる。(B ″) 0.25 <D FT / f T <0.8 The above two zoom types include the third lens unit having a positive refractive power on the image side of the second lens unit, and from the wide angle end, When changing the magnification to the telephoto end, it is advisable to use a zoom type in which the second and third groups move while changing the relative distance.This method efficiently uses space to correct the focal position by changing the magnification. However, you can earn a high zoom ratio.

【００２８】その場合、無限遠合焦時に広角端から望遠
端に変倍する際の第２群、第３群のそれぞれの移動量Ｍ
2 、Ｍ3 の比を、 （ｃ） ０．５＜Ｍ3 ／Ｍ2 ＜２．０ の範囲にするのがよい。この条件の上限値の２．０を越
えると、ズーム比やフォーカス可能距離レンジを十分に
とることができない。下限値の０．５を越えると、こち
らもズーム比の確保が困難である。In that case, the amount of movement M of each of the second group and the third group at the time of zooming from the wide-angle end to the telephoto end during focusing at infinity.
The ratio of 2 and M 3 is preferably in the range of (c) 0.5 <M 3 / M 2 <2.0. If the upper limit of 2.0 of this condition is exceeded, the zoom ratio and the focusable distance range cannot be sufficiently obtained. If the lower limit of 0.5 is exceeded, it is difficult to secure the zoom ratio here as well.

【００２９】なお、次のようにすればより好ましい。The following is more preferable.

【００３０】 （ｃ' ） ０．７＜Ｍ3 ／Ｍ2 ＜１．４ さらに、次のようにすればなお好ましい。(C ′) 0.7 <M 3 / M 2 <1.4 Furthermore, the following is more preferable.

【００３１】 （ｃ" ） ０．８＜Ｍ3 ／Ｍ2 ＜１．２５ 上記の２つのズームタイプは、第１群（第１−１群から
第１−２群にかけての合成系）をズーム時、フォーカス
時に動かすのは光路折り曲げ系につき機構的に困難なた
め、固定とするのがよい。なお、第１−１群は変倍時固
定とするが、第１−２群は移動することが比較的容易な
ため可動としてもよい。その場合、変倍時に像側に凸の
軌跡を描きつつ移動するのがよい。この、第１−２群は
色収差や歪曲収差等の軸外収差を補正するために、物体
側から順に、負レンズ、正レンズの２枚若しくは正レン
ズ１枚から構成するのがよい。(C ″) 0.8 <M 3 / M 2 <1.25 The two zoom types described above zoom the first group (composite system from the 1-1 group to the 1-2 group). At this time, it is better to fix it because it is mechanically difficult to move it during focusing and focusing because of the optical path bending system. Since it is relatively easy to move, in that case, it is preferable to move while drawing a convex locus on the image side at the time of zooming. For correction, it is preferable that the negative lens and the positive lens are arranged in this order from the object side, or two positive lenses or one positive lens.

【００３２】さらに、以下の構成上の限定の何れかを加
えると、より一層高い仕様、性能、簡素な構成の折り曲
げズームレンズ系を得ることができ、撮像装置のさらな
る薄型化に寄与する。Furthermore, by adding any of the following structural limitations, it is possible to obtain a folding zoom lens system having higher specifications, performance, and a simpler configuration, which contributes to further thinning of the image pickup apparatus.

【００３３】○第１−１群は光路を折り曲げるための反
射光学素子より物体側の負レンズ群は、物体側に凸の負
レンズ１枚のみとする。In the 1-1 group, the negative lens group on the object side of the reflective optical element for bending the optical path is composed of only one negative lens convex on the object side.

【００３４】この配置が画角を維持しながら光学系の奥
行を最も薄くできる構成である。With this arrangement, the depth of the optical system can be minimized while maintaining the angle of view.

【００３５】○その場合、負レンズのパワーがある程度
ないと意味がないので、第１−１群と第１−２群のパワ
ー比を、 （ｄ） −０．８＜ｆ11／ｆ12＜１．９ とする。ただし、ｆ11は第１−１群の焦点距離、ｆ12は
第１−２群の焦点距離である。この条件の上下限の１．
９、−０．８の何れを越えても、折り曲げ光学素子が大
型化しやすい。[0035] ○ In this case, since no sense the power of the negative lens is not to some extent, the power ratio of the 1-1 group and group the 1-2, (d) -0.8 <f 11 / f 12 < Set to 1.9. However, f 11 is the focal length of the 1-1st lens group, and f 12 is the focal length of the 1-2nd lens group. The upper and lower limits of this condition are 1.
When the value exceeds 9 or -0.8, the bending optical element tends to be large.

【００３６】なお、次のようにすればより好ましい。The following is more preferable.

【００３７】 （ｄ' ） −０．６＜ｆ11／ｆ12＜１．７ さらに、次のようにすればなお好ましい。(D ′) −0.6 <f 11 / f 12 <1.7 Further, the following is more preferable.

【００３８】 （ｄ" ） −０．４＜ｆ11／ｆ12＜１．５ ○第２群又は第３群の何れか一方が単レンズ、もう一方
には少なくとも凹レンズを含む。(D ″) −0.4 <f 11 / f 12 <1.5 ○ One of the second group and the third group includes a single lens, and the other includes at least a concave lens.

【００３９】第２群と第３群は変倍時に相対的間隔をわ
ずかに変えながら概ね同一方向に移動することで、移動
スペースを共用でき、少ないスペースで焦点位置を一定
に保ちつつ変倍することができるのであるが、その他の
メリットとして、それぞれの群の色収差の補正が完結し
ている必要がないということである。つまり、第２群、
第３群は相互に色収差が補正できる。したがって、何れ
か一方を単レンズにて構成してもよい。小型軽量化に貢
献する。By moving the second group and the third group in substantially the same direction while slightly changing the relative distance during zooming, it is possible to share a moving space and carry out zooming while keeping the focal position constant in a small space. However, another advantage is that the correction of the chromatic aberration of each group does not have to be completed. That is, the second group,
The third group can mutually correct chromatic aberration. Therefore, either one may be configured with a single lens. Contributing to downsizing and weight reduction.

【００４０】○第２群と第３群の相対的間隔変化をでき
るだけ小さく保つには、第２群以降の合成系の倍率が−
１倍近傍にて変倍するのがよい。したがって、望遠端に
おいては以下の条件を満足するのがよい。In order to keep the relative distance change between the second group and the third group as small as possible, the magnification of the composite system after the second group is-.
It is better to change the magnification in the vicinity of 1 time. Therefore, it is preferable to satisfy the following conditions at the telephoto end.

【００４１】（ｅ） ０．７＜−βRt＜２．１ ただし、βRtは第２群以降の望遠端における合成倍率
（無限遠物点）である。(E) 0.7 <-β Rt <2.1 where β Rt is a composite magnification (infinity object point) at the telephoto end after the second lens unit.

【００４２】この条件の上下限２．１、０．７の何れを
越えても、第２群と第３群との相対的間隔の変化量が大
きくなってしまう。If the upper and lower limits 2.1 or 0.7 of these conditions are exceeded, the amount of change in the relative distance between the second group and the third group becomes large.

【００４３】なお、次のようにすればより好ましい。The following is more preferable.

【００４４】（ｅ' ） ０．８＜−βRt＜１．９ さらに、次のようにすればなお好ましい。(E ') 0.8 <-β Rt <1.9 Further, the following is more preferable.

【００４５】（ｅ”） ０．８５＜−βRt＜１．７ 本発明の電子撮像装置は、また、広角端から望遠端に変
倍する際に物体側にのみ移動する群を少なくとも１つ含
み、変倍時に可動な全ての群の最も物体側のレンズより
も物体側に入射面・射出面の少なくとも一方が曲率を有
する面である光路を折り曲げるための反射光学素子を少
なくとも１つ含む光路折り曲げズーム光学系及びその像
側に配置された電子撮像素子を有することを特徴とする
ものを含むものである。(E ″) 0.85 <−β Rt <1.7 The electronic image pickup apparatus of the present invention also includes at least one group that moves only to the object side when zooming from the wide-angle end to the telephoto end. An optical path including at least one reflective optical element for bending an optical path that is a surface having at least one of an entrance surface and an exit surface having a curvature on the object side of the most object-side lens of all the groups that are movable during zooming. It includes a folding zoom optical system and an electronic image pickup device arranged on the image side thereof.

【００４６】このように、光路を折り曲げるための反射
光学素子（プリズム）に屈折力を保有させることで、レ
ンズ要素数を削減でき、コンパクト化やコストダウンに
寄与する。As described above, by allowing the reflective optical element (prism) for bending the optical path to have a refractive power, the number of lens elements can be reduced, which contributes to downsizing and cost reduction.

【００４７】この場合に、光路を折り曲げるための反射
光学素子を光路折り曲げズーム光学系の最も物体側に配
置することができる。In this case, the reflective optical element for bending the optical path can be arranged on the most object side of the optical path bending zoom optical system.

【００４８】このように、光路折り曲げ素子は出来るだ
け物体側に配した方が、電子撮像装置の奥行き方向を薄
くできる。As described above, when the optical path bending element is arranged on the object side as much as possible, the depth direction of the electronic image pickup device can be made thin.

【００４９】また、光路を折り曲げるための反射光学素
子の入射面を物体側に凹面を向けた構成にすることがで
きる。Further, the incident surface of the reflective optical element for bending the optical path can be constructed so that the concave surface faces the object side.

【００５０】本発明の一例である、物体側から負メニス
カスレンズ、光路折り曲げプリズムの順に構成したズー
ム光学系を有する薄型電子撮像装置に対し、光路折り曲
げプリズムの入射面に負の屈折力を持たせることで、そ
の負メニスカスレンズを省略でき、電子撮像装置の奥行
き方向をより薄くすることが可能となる。In a thin electronic image pickup device having a zoom optical system, which is an example of the present invention in order from the object side, a negative meniscus lens and an optical path bending prism, a negative refracting power is given to the incident surface of the optical path bending prism. As a result, the negative meniscus lens can be omitted, and the depth direction of the electronic image pickup device can be made thinner.

【００５１】その場合に、光路を折り曲げるための反射
光学素子の入射面を非球面とすることができる。In this case, the incident surface of the reflective optical element for bending the optical path can be made aspheric.

【００５２】入射面の光軸上曲率が負値（物体側に凹面
を向けた構成）である場合、歪曲収差等の軸外収差補正
上不利となるため、非球面を導入することでその収差補
正を可能としている。If the curvature of the entrance surface on the optical axis has a negative value (the concave surface is directed to the object side), it is disadvantageous in correction of off-axis aberrations such as distortion. Correction is possible.

【００５３】そして、光路を折り曲げるための反射光学
素子の射出面を平面とすることができる。The exit surface of the reflective optical element for bending the optical path can be a flat surface.

【００５４】上記のように、入射面に非球面を導入する
と、射出面との面間偏心精度の確保が困難となるため、
もう一方の面（射出面）を平面として面間偏心要求精度
を緩和することができる。As described above, if an aspherical surface is introduced into the entrance surface, it becomes difficult to secure the accuracy of the eccentricity between the entrance surface and the exit surface.
The other surface (emission surface) can be made a flat surface to reduce the required accuracy of eccentricity between the surfaces.

【００５５】また、広角端から望遠端に変倍する際に物
体側にのみ移動する群は、２つの正レンズと少なくとも
１つの負レンズとからなり、少なくとも１つずつの正レ
ンズと負レンズが互いに接合されているものとすること
ができる。The group that moves only toward the object side when zooming from the wide-angle end to the telephoto end consists of two positive lenses and at least one negative lens, and at least one positive lens and at least one negative lens are included. It can be joined to each other.

【００５６】広角端から望遠端に変倍する際に物体側に
のみ移動する群においては、正レンズと負レンズの相対
偏心による収差の劣化が大きい傾向にある。したがっ
て、上記のように出来るだけ互いに接合しておいた方が
好ましい。In the group that moves only to the object side when zooming from the wide-angle end to the telephoto end, deterioration of aberration due to relative decentering of the positive lens and the negative lens tends to be large. Therefore, it is preferable to bond them to each other as much as possible.

【００５７】また、広角端から望遠端に変倍する際に物
体側にのみ移動する群は、２つの正レンズと１つの負レ
ンズとからなり、その負レンズが少なくとも一方の正レ
ンズと互いに接合されているものとすることができる。The group that moves only toward the object side when zooming from the wide-angle end to the telephoto end consists of two positive lenses and one negative lens, and the negative lens is cemented to at least one positive lens. It can be.

【００５８】このように、広角端から望遠端に変倍する
際に物体側にのみ移動する群は、２つの正レンズと１つ
の負レンズの合計３枚が最低構成要素である。As described above, in the group that moves only to the object side when the magnification is changed from the wide-angle end to the telephoto end, the minimum number of constituent elements is two positive lenses and one negative lens.

【００５９】さて、次に、フィルター類を薄くすること
について言及する。電子撮像装置には、通常赤外光が撮
像面に入射しないように一定の厚みのある赤外吸収フィ
ルターを撮像素子よりも物体側に挿入している。これを
厚みのないコーティングに置き換えることを考える。当
然その分薄くなる訳だが、副次的効果がある。ズームレ
ンズ系後方にある電子撮像素子よりも物体側に、６００
ｎｍでの透過率が８０％以上、７００ｎｍでの透過率が
１０％以下の近赤外シャープカットコートを導入する
と、吸収タイプよりも相対的に赤側の透過率が高くな
り、補色モザイクフィルターを有するＣＣＤの欠点であ
る青紫側のマゼンタ化傾向がゲイン調整により緩和さ
れ、原色フィルターを有するＣＣＤ並みの色再現を得る
ことができる。一方、補色フィルターの場合、その透過
光エネルギーの高さから原色フィルター付きＣＣＤと比
べ実質的感度が高く、かつ，解像的にも有利であるた
め、小型ＣＣＤを使用したときのメリットが大である。
もう一方のフィルターである光学的ローパスフィルター
についてもその総厚ｔLPF 以下の条件を満たすようにす
るとよい。 （ｆ） ０．１５ａ＜ｔLPF ＜０．
４５ａ ａは電子撮像素子の水平画素ピッチ（単位μｍ）。Now, reference will be made to thinning the filters. In the electronic image pickup device, an infrared absorption filter having a certain thickness is usually inserted closer to the object side than the image pickup element so that infrared light does not enter the image pickup surface. Consider replacing this with a thin coating. Naturally, it will be thinned by that amount, but there is a secondary effect. On the object side of the electronic image sensor behind the zoom lens system,
When a near-infrared sharp cut coat with a transmittance of 80% or more at nm and a transmittance of 10% or less at 700 nm is introduced, the transmittance on the red side becomes relatively higher than that of the absorption type, and a complementary color mosaic filter is used. The magenta tendency on the blue-violet side, which is a drawback of the CCD, is mitigated by the gain adjustment, and color reproduction comparable to that of a CCD having a primary color filter can be obtained. On the other hand, the complementary color filter has substantially higher sensitivity than the CCD with the primary color filter due to its high transmitted light energy, and is also advantageous in resolution. Therefore, the advantage of using a small CCD is large. is there.
It is advisable to satisfy the condition of the total thickness t LPF or less for the optical low-pass filter which is the other filter. (F) 0.15a <t LPF <0.
45a is a horizontal pixel pitch (unit: μm) of the electronic image sensor.

【００６０】光学的ローパスフィルターを薄くすると、
一般的にはモアレ抑制効果が減少して好ましくない。一
方、画素ピッチが小さくなるにつれて結像レンズ系の回
折の影響によりナイキスト限界以上の周波数成分のコン
トラストは減少し、モアレ抑制効果の減少はある程度許
容されるようになる。例えば、像面上投影時の方位角度
が水平（＝０°）と±４５°方向にそれぞれ結晶軸を有
する３種類のフィルターを光軸方向に重ねて使用する場
合、かなりモアレ抑制効果があることが知られている。
この場合のフィルターが最も薄くなる仕様としては、水
平にａμｍ、±４５°方向にそれぞれSQRT(1/2) ＊ａμ
ｍだけずらせるものが知られている。このときのフィル
ター厚は、凡そ［１＋２＊SQRT(1/2) ］＊ａ／５．８８
（ｍｍ）となる。ここで、ＳＱＲＴはスクエアルートで
あり平方根を意味する。これは、丁度ナイキスト限界に
相当する周波数においてコントラストをゼロにする仕様
である。これよりは数％乃至数十％程度薄くすると、ナ
イキスト限界に相当する周波数のコントラストが少し出
てくるが、上記回折の影響で抑えるることが可能にな
る。When the optical low-pass filter is made thin,
Generally, the moire suppressing effect decreases, which is not preferable. On the other hand, as the pixel pitch becomes smaller, the contrast of frequency components above the Nyquist limit is reduced due to the influence of diffraction of the imaging lens system, and the reduction of the moire suppression effect is allowed to some extent. For example, when three types of filters having crystal axes in the horizontal (= 0 °) and ± 45 ° directions when projected on the image plane are used in an overlapping manner in the optical axis direction, there is a considerable moire suppressing effect. It has been known.
The specifications for the thinnest filter in this case are horizontal aμm and ± 45 ° SQRT (1/2) * aμ.
It is known to shift by m. The filter thickness at this time is approximately [1 + 2 * SQRT (1/2)] * a / 5.88.
(Mm). Here, SQRT is a square root and means a square root. This is a specification that makes the contrast zero at a frequency just corresponding to the Nyquist limit. When the thickness is reduced by about several percent to several tens of percent, the contrast of the frequency corresponding to the Nyquist limit is slightly generated, but it can be suppressed by the influence of the diffraction.

【００６１】上記以外のフィルター仕様、例えば２枚重
ねあるいは１枚で実施する場合も含めて、条件（ｆ）を
満足するのがよい。その上限値の０．４５ａを越える
と、光学的ローパスフィルターが厚すぎ薄型化の妨げに
なる。下限値の０．１５ａを越えると、モアレ除去が不
十分になる。ただし、これを実施する場合のａの条件は
５μｍ以下である。It is preferable that the condition (f) is satisfied including filter specifications other than the above, for example, a case where two filters are stacked or one filter is used. When the upper limit of 0.45a is exceeded, the optical low-pass filter becomes too thick, which hinders reduction in thickness. If the lower limit of 0.15a is exceeded, moire removal will be insufficient. However, the condition of a when this is carried out is 5 μm or less.

【００６２】ａが４μｍ以下なら、より回折の影響を受
けやすいので、 （ｆ' ） ０．１３ａ＜ｔLPF ＜０．４２ａ としてもよい。また、水平画素ピッチと重ねるローパス
フィルターの枚数に応じて、以下のようにしてもよい。If a is 4 μm or less, it is more susceptible to diffraction, and therefore (f ′) 0.13a <t LPF <0.42a. Further, the following may be performed according to the horizontal pixel pitch and the number of low-pass filters to be overlapped.

【００６３】 （ｆ”）４μm 以上： ０．３ａ＜ｔLPF ＜０．４ａ …３枚重ね ａ＜５μｍ ０．２ａ＜ｔLPF ＜０．２８ａ …２枚重ね ａ＜５μｍ ０．１ａ＜ｔLPF ＜０．１６ａ …１枚 ａ＜５μｍ ４μｍ以下： ０．２５ａ＜ｔLPF ＜０．３７ａ …３枚重ね ａ＜４μｍ ０．１６ａ＜ｔLPF ＜０．２５ａ …２枚重ね ａ＜４μｍ ０．０８ａ＜ｔLPF ＜０．１４ａ …１枚 ａ＜４μｍ 画素ピッチの小さな電子撮像素子を使用する場合、絞り
込みによる回折効果の影響で画質が劣化する。したがっ
て、開口サイズが固定の複数の開口を有し、その中の１
つを第１群の最も像側のレンズ面と第３群の最も物体側
のレンズ面の間の何れかの光路内に挿入でき、かつ、他
の開口と交換可能とすることで像面照度の調節すること
ができる電子撮像装置としておき、その複数の開口の
中、一部の開口内に５５０ｎｍに対する透過率がそれぞ
れ異なり、かつ、８０％未満であるような媒体を有する
ようにして光量調節を行なうのがよい。あるいは、ａ
（μｍ）／Ｆナンバー＜０．４となるようなＦ値に相当
する光量になるように調節を実施する場合は、開口内に
５５０ｎｍに対する透過率がそれぞれ異なりかつ８０％
未満の媒体を有する電子撮像装置とするのがよい。例え
ば、開放値から上記条件の範囲外ではその媒体なしかあ
るいは５５０ｎｍに対する透過率が９１％以上のダミー
媒質としておき、範囲内のときは回折の影響が出る程に
開口絞り径を小さくするのではなく、ＮＤフィルターの
ようなもので光量調節するのがよい。(F ″) 4 μm or more: 0.3a <t LPF <0.4a… 3 stacks a <5 μm 0.2a <t LPF <0.28a… 2 stacks a <5 μm 0.1a <t LPF <0.16a ... 1 sheet a <5 μm 4 μm or less: 0.25a <t LPF <0.37a 3 sheets stacked a <4 μm 0.16a <t LPF <0.25a 2 sheets stacked a <4 μm 0.08a <T LPF <0.14a ... 1 sheet a <4 μm When an electronic image pickup device having a small pixel pitch is used, the image quality is deteriorated due to the diffraction effect due to the narrowing down, and therefore, a plurality of apertures having a fixed aperture size are provided. , One of them
One can be inserted into the optical path between the most image-side lens surface of the first lens unit and the most object-side lens surface of the third lens unit, and can be replaced with another aperture to allow the image plane illuminance to be changed. Of the plurality of apertures, and some of the apertures have media having different transmittances for 550 nm and less than 80%. It is better to do Alternatively, a
(Μm) / F number <0.4 When adjusting so that the light amount corresponds to the F value, the transmittance at 550 nm in the aperture is different and 80%.
It is better to have an electronic imaging device with less than medium. For example, if the open value is out of the range of the above conditions, the medium is not used, or a dummy medium having a transmittance of 91% or more for 550 nm is set, and if it is within the range, the aperture stop diameter may be reduced so that the influence of diffraction may occur. Instead, it is better to adjust the light quantity with something like an ND filter.

【００６４】また、その複数の開口をそれぞれ径をＦ値
に反比例して小さくしたものにして揃えておき、ＮＤフ
ィルターの代わりにそれぞれ周波数特性の異なる光学的
ローパスフィルターを開口内に入れておくのでもよい。
絞り込むにつれて回折劣化が大きくなるので、開口径が
小さくなる程光学的ローパスフィルターの周波数特性を
高く設定しておく。Further, the diameters of the plurality of openings are made smaller in inverse proportion to the F value and are aligned, and optical low-pass filters having different frequency characteristics are inserted in the openings instead of the ND filter. But it's okay.
Since the diffraction deterioration increases as the aperture is narrowed down, the frequency characteristic of the optical low pass filter is set higher as the aperture diameter becomes smaller.

【００６５】電子撮像装置の薄型化は、光学系の構成の
工夫の他に、機械的機構やレイアウトの工夫も重要であ
る。特に、撮影をしないときにレンズを本体内に収納す
るいわゆる沈胴方式を採用することは重要である。その
機構として、本発明のレンズ構成の場合には、既に本体
内にある反射光学素子を光路から本体内の別の空間に退
避し、その空いた光路上の空間に、反射光学素子よりも
物体側にあって撮影時には本体から突出しているレンズ
群を移動して収納する方式を採用するのがよい。In order to reduce the thickness of the electronic image pickup device, it is important to devise a mechanical mechanism and a layout in addition to devising the optical system configuration. In particular, it is important to adopt a so-called collapsible method in which the lens is housed in the main body when not shooting. As the mechanism, in the case of the lens configuration of the present invention, the reflective optical element already in the main body is retracted from the optical path to another space in the main body, and in the space on the empty optical path, an object is provided rather than the reflective optical element. It is advisable to adopt a method in which the lens groups that are on the side and project from the main body are moved and stored during shooting.

【００６６】なお、本発明に採用したレンズ構成以外で
あっても、物体側より順に、負の第１レンズ群、光路折
り曲げのための反射光学素子、正の第２レンズ群を有す
るような光学系であれば、反射光学素子を光路から本体
内の別の空間に退避し、その空いた光路上の空間に第１
レンズ群を移動して収納する方式が使える。It should be noted that an optical system having a negative first lens group, a reflective optical element for bending the optical path, and a positive second lens group in order from the object side, other than the lens structure adopted in the present invention. In the case of a system, the reflective optical element is retracted from the optical path to another space in the main body, and the first space is placed in the empty optical path.
The method of moving and storing the lens group can be used.

【００６７】さらに、第１レンズ群の収納時、第２レン
ズ群が撮影時の最も像面から離れた位置よりも像側に退
避するようにするとよい。第２レンズ群以降には変倍や
フォーカスのための移動スペースがあるので、例えば収
納時にそれを有効利用するために、収納時には第２群は
できるだけ像側に押し下げ、必要によっては反射光学素
子も像側に移動して第１群を収納したりすることができ
る。Further, when the first lens group is housed, it is preferable that the second lens group be retracted toward the image side with respect to the position farthest from the image plane during photographing. Since there is a moving space for zooming and focusing after the second lens group, for example, in order to make effective use of it during storage, the second group should be pushed down toward the image side as much as possible during storage, and if necessary a reflective optical element as well. It is possible to move to the image side and store the first group.

【００６８】反射光学素子が特に薄板に反射ミラーコー
ティングを施した反射ミラーで構成するような場合は、
その収納時に、反射ミラーを反射面が折り曲げ、前の光
軸と垂直となるように退避させることができるので、退
避スペースを必要とせずに第１群の収納が可能である。When the reflection optical element is composed of a reflection mirror having a thin plate coated with a reflection mirror,
At the time of storage, the reflection mirror can be retracted so that the reflection surface is bent and perpendicular to the front optical axis, so that the first group can be stored without requiring a retract space.

【００６９】その他、収納時に反射光学素子以外のレン
ズ１枚１枚を倒したり移動して収納空間を作りだしても
よい。In addition, the storage space may be created by tilting or moving the lenses other than the reflective optical element during storage.

【００７０】プリズムを外殻のみ固体で形成し、内部を
液体等で充填したもので構成する場合は、内部の液体を
抜いて薄くするのもよい。When the prism is formed by forming only the outer shell with a solid and filling the inside with a liquid or the like, the liquid inside may be drained to make it thinner.

【００７１】なお、反射光学素子を利用した光学系を用
いると、以下のようなことが可能になる。By using an optical system using a reflective optical element, the following can be achieved.

【００７２】最も優れた応用例として、ポロプリズム方
式のファインダーと融合したＴＴＬ一眼レフ光学系であ
る。The most excellent application example is a TTL single-lens reflex optical system fused with a Porro prism type finder.

【００７３】例えば、反射光学素子を含む撮影光学系と
撮像素子との間に、反射光学素子での反射前後の光軸を
含む平面に対し略直角の側にも光路を分割する第２の反
射面（時分割でも振幅分割でも何でもよい）を設け、そ
の反射側に沿ってその第２の反射面の法線に対し略同一
平面内でかつ略直角である法線を有する第３の反射面を
設け、さらに、反射後の光路がその撮影光学系の入射側
の光軸と略平行に射出するように第４の反射面を設けた
もの等である。これは、カメラの薄型化に大きく貢献す
る。For example, the second reflection that divides the optical path between the photographing optical system including the reflection optical element and the image pickup element also on the side substantially perpendicular to the plane including the optical axis before and after reflection by the reflection optical element. A surface (which may be time division or amplitude division) may be provided, and a third reflection surface having a normal line along the reflection side thereof that is substantially in the same plane as the normal line of the second reflection surface and at a right angle. And a fourth reflecting surface so that the optical path after reflection exits substantially parallel to the optical axis on the incident side of the photographing optical system. This greatly contributes to making the camera thinner.

【００７４】第２の応用例として、反射光学素子とそれ
よりも物体側の光学系を例えば撮影光学系の入射瞳位置
近傍を回転中心に回転して撮影方向を変えることができ
る。あるいは、光学的な手ブレ補正も可能である。As a second example of application, the photographing direction can be changed by rotating the reflective optical element and the optical system on the object side of the reflective optical element, for example, around the entrance pupil position of the photographing optical system as a rotation center. Alternatively, optical camera shake correction is also possible.

【００７５】[0075]

【発明の実施の形態】以下、本発明の電子撮像装置に用
いられる光路折り曲げズーム光学系の実施例１〜１２に
ついて説明する。これらの実施例の無限遠物点合焦時の
望遠端（ａ）、中間状態（ｂ）、広角端（ｃ）でのレン
ズ断面図をそれぞれ図１〜図１２に示す。各図中、第１
群はＧ１、第１−１群はＧ１−１、第１−２群はＧ１−
２、第２群はＧ２、第３群はＧ３、第４群はＧ４、第５
群はＧ５、光路折り曲げプリズムはＰ、開口絞り（独立
の場合）はＳ、近赤外カットフィルターはＩＦ、近赤外
カットコート面はＩＣ、ローパスフィルターはＬＦ、電
子撮像素子であるＣＣＤのカバーガラスはＣＧ、ＣＣＤ
の像面はＩで示してあり、物体側から順に配置された近
赤外カットフィルターＩＦ、ローパスフィルターＬＦ、
カバーガラスＣＧ、あるいは、近赤外カットコート面Ｉ
Ｃ、ローパスフィルターＬＦ、カバーガラスＣＧは、最
終群と像面Ｉの間に固定配置されている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments 1 to 12 of an optical path bending zoom optical system used in an electronic image pickup device of the present invention will be described below. FIGS. 1 to 12 show lens cross-sectional views of these examples at the telephoto end (a), the intermediate state (b), and the wide-angle end (c) when focusing on an object point at infinity, respectively. First in each figure
The group is G1, the 1-1 group is G1-1, and the 1-2 group is G1-.
2, the second group is G2, the third group is G3, the fourth group is G4, the fifth
The group is G5, the optical path bending prism is P, the aperture stop (independent case) is S, the near-infrared cut filter is IF, the near-infrared cut coat surface is IC, the low-pass filter is LF, and the CCD of the electronic image sensor is a cover. Glass is CG, CCD
Is indicated by I, and the near-infrared cut filter IF, low-pass filter LF, and
Cover glass CG or near infrared cut coat surface I
C, the low-pass filter LF, and the cover glass CG are fixedly arranged between the final group and the image plane I.

【００７６】実施例１の光路折り曲げズーム光学系は、
図１に示すように、両凹負レンズと等価な光路折り曲げ
プリズムＰからなる第１−１群Ｇ１−１、両凸正レンズ
からなる第１−２群Ｇ１−２、開口絞りと両凸正レンズ
からなる第２群Ｇ２、両凸正レンズと両凹負レンズの接
合レンズと両凸正レンズからなる第３群Ｇ３、物体側に
凸の負メニスカスレンズからなる第４群Ｇ４、両凸正レ
ンズからなる第５群Ｇ５からなり、広角端から望遠端に
変倍する際は、第２群Ｇ２と第３群Ｇ３は間の間隔を一
旦は広げ後に狭めながら物体側へ移動し、第４群Ｇ４は
第３群Ｇ３との間隔を広げながら物体側へ移動する。The optical path bending zoom optical system of Example 1 is
As shown in FIG. 1, the 1-1st group G1-1 including an optical path bending prism P equivalent to a biconcave negative lens, the 1-2nd group G1-2 including a biconvex positive lens, an aperture stop and a biconvex positive lens. The second group G2 composed of lenses, the third group G3 composed of a cemented lens of a biconvex positive lens and a biconcave negative lens, and a biconvex positive lens, the fourth group G4 composed of a negative meniscus lens convex toward the object side, the biconvex positive The fifth lens group G5 is composed of lenses, and when zooming from the wide-angle end to the telephoto end, the second lens group G2 and the third lens group G3 move toward the object side while narrowing the distance between them and then narrowing them. The group G4 moves toward the object side while widening the distance from the third group G3.

【００７７】非球面は、第１−２群Ｇ１−２の両凸正レ
ンズの物体側の面、第２群Ｇ２の両凸正レンズの物体側
の面、第４群Ｇ４の負メニスカスレンズの像面側の面、
第５群Ｇ５の両凸正レンズの像面側の面の４面に用いら
れている。The aspherical surfaces are the object-side surface of the biconvex positive lens of the first-second group G1-2, the object-side surface of the biconvex positive lens of the second group G2, and the negative meniscus lens of the fourth group G4. Image side,
It is used for the four surfaces of the image-side surface of the biconvex positive lens of the fifth group G5.

【００７８】実施例２の光路折り曲げズーム光学系は、
図２に示すように、両凹負レンズと等価な光路折り曲げ
プリズムＰからなる第１−１群Ｇ１−１、両凸正レンズ
からなる第１−２群Ｇ１−２、独立に移動する開口絞り
Ｓ、両凸正レンズと物体側に凸の正メニスカスレンズと
物体側に凸の負メニスカスレンズからなる第２群Ｇ２、
両凸正レンズと像面側に凸の負メニスカスレンズからな
る第３群Ｇ３、物体側に凸の正メニスカスレンズからな
る第４群Ｇ４からなり、広角端から望遠端に変倍する際
は、第２群Ｇ４と第３群Ｇ３は相互に間隔を広げながら
物体側へ移動する。第１−２群Ｇ１−２と第２群Ｇ４の
間に配置された開口絞りＳも、第１−２群Ｇ１−２と第
２群Ｇ４の間の間隔を狭めながら物体側へ移動する。The optical path bending zoom optical system of Example 2 is
As shown in FIG. 2, a first-first group G1-1 including an optical path bending prism P equivalent to a biconcave negative lens, a first-second group G1-2 including a biconvex positive lens, and an aperture diaphragm that moves independently. S, a second group G2 including a biconvex positive lens, a positive meniscus lens having a convex surface on the object side, and a negative meniscus lens having a convex surface on the object side,
The third lens group G3 is composed of a biconvex positive lens and a negative meniscus lens having a convex surface on the image side, and the fourth lens group G4 is composed of a positive meniscus lens having a convex surface on the object side. The second group G4 and the third group G3 move toward the object side while increasing the distance between them. The aperture stop S arranged between the first-second group G1-2 and the second group G4 also moves toward the object side while narrowing the interval between the first-second group G1-2 and the second group G4.

【００７９】非球面は、第１−２群Ｇ１−２の両凸正レ
ンズの物体側の面、第２群Ｇ２の最も物体側の面、第４
群Ｇ４の正メニスカスレンズの物体側の面の３面に用い
られている。The aspherical surface is the object-side surface of the biconvex positive lens in the first-second group G1-2, the most object-side surface of the second group G2, and the fourth surface.
It is used for three surfaces of the positive meniscus lens of the group G4 on the object side.

【００８０】実施例３の光路折り曲げズーム光学系は、
図３に示すように、物体側に凸の負メニスカスレンズと
平行平面板と等価な光路折り曲げプリズムＰからなる第
１−１群Ｇ１−１、両凹負レンズと両凸正レンズからな
る第１−２群Ｇ１−２、開口絞りと両凸正レンズからな
る第２群Ｇ２、両凸正レンズと物体側に凸の負メニスカ
スレンズと両凸正レンズと像面側に凸の負メニスカスレ
ンズからなる第３群Ｇ３、像面側に凸の正メニスカスレ
ンズからなる第４群Ｇ４からなり、広角端から望遠端に
変倍する際は、第２群Ｇ２と第３群Ｇ３は間の間隔を一
旦は広げ後に狭めながら物体側へ移動する。The optical path bending zoom optical system of Example 3 is
As shown in FIG. 3, a first-first group G1-1 including a negative meniscus lens convex on the object side and an optical path bending prism P equivalent to a plane parallel plate, a first biconcave negative lens and a biconvex positive lens -2nd group G1-2, a second group G2 consisting of an aperture stop and a biconvex positive lens, a biconvex positive lens, a negative meniscus lens convex to the object side, a biconvex positive lens and a negative meniscus lens convex to the image side And a fourth group G4 composed of a positive meniscus lens having a convex surface on the image side. When zooming from the wide-angle end to the telephoto end, the second group G2 and the third group G3 are spaced apart from each other. After expanding once, it moves toward the object side while narrowing.

【００８１】非球面は、第１−２群Ｇ１−２の両凸正レ
ンズの物体側の面、第３群Ｇ３の最も物体側の面、第４
群Ｇ４の正メニスカスレンズの物体側の面の３面に用い
られている。The aspherical surface is the object-side surface of the biconvex positive lens in the first-second group G1-2, the most object-side surface of the third group G3, and the fourth surface.
It is used for three surfaces of the positive meniscus lens of the group G4 on the object side.

【００８２】実施例４の光路折り曲げズーム光学系は、
図４に示すように、物体側に凸の負メニスカスレンズと
平行平面板と等価な光路折り曲げプリズムＰからなる第
１−１群Ｇ１−１、両凹負レンズと両凸正レンズからな
る第１−２群Ｇ１−２、開口絞りと両凸正レンズと両凸
正レンズと物体側に凸の負メニスカスレンズからなる第
２群Ｇ２、物体側に凸の正メニスカスレンズからなる第
３群Ｇ３、像面側に凸の正メニスカスレンズからなる第
４群Ｇ４からなり、広角端から望遠端に変倍する際は、
第２群Ｇ２と第３群Ｇ３は間の間隔を一旦は広げ後に狭
めながら物体側へ移動する。The optical path bending zoom optical system of Example 4 is
As shown in FIG. 4, a first-first group G1-1 composed of a negative meniscus lens convex to the object side and an optical path bending prism P equivalent to a plane parallel plate, a first group composed of a biconcave negative lens and a biconvex positive lens. -Second group G1-2, a second group G2 including an aperture stop, a biconvex positive lens, a biconvex positive lens, and a negative meniscus lens having a convex surface on the object side, and a third group G3 including a positive meniscus lens having a convex surface on the object side, The fourth lens unit G4 is composed of a positive meniscus lens element having a convex surface on the image side, and when changing the magnification from the wide-angle end to the telephoto end,
The second group G2 and the third group G3 move toward the object side while once widening the interval between them and then narrowing them.

【００８３】非球面は、第１−２群Ｇ１−２の両凸正レ
ンズの物体側の面、第２群Ｇ２の絞りの後の両凸正レン
ズの物体側の面、第４群Ｇ４の正メニスカスレンズの物
体側の面の３面に用いられている。The aspherical surfaces are the object-side surface of the biconvex positive lens of the first-second group G1-2, the object-side surface of the biconvex positive lens after the stop of the second group G2, and the fourth group G4. It is used for three surfaces of the positive meniscus lens on the object side.

【００８４】実施例５の光路折り曲げズーム光学系は、
図５に示すように、物体側に凸の正メニスカスレンズと
物体側に凸の負メニスカスレンズと平行平面板と等価な
光路折り曲げプリズムＰからなる第１群Ｇ１、開口絞り
と両凸正レンズからなる第２群Ｇ２、両凸正レンズと両
凹負レンズの接合レンズと両凸正レンズからなる第３群
Ｇ３、物体側に凸の負メニスカスレンズからなる第４群
Ｇ４、物体側に凸の正メニスカスレンズからなる第５群
Ｇ５からなり、広角端から望遠端に変倍する際は、第２
群Ｇ２と第３群Ｇ３は間の間隔を一旦は広げ後に狭めな
がら、また、第３群Ｇ３と第４群Ｇ４は間の間隔を広げ
ながら、物体側へ移動し、第５群Ｇ５は若干像面側へ移
動する。The optical path bending zoom optical system of Example 5 is as follows:
As shown in FIG. 5, a first group G1 including a positive meniscus lens having a convex surface on the object side, a negative meniscus lens having a convex surface on the object side, and an optical path bending prism P equivalent to a plane-parallel plate, an aperture stop and a biconvex positive lens. The second group G2, the third group G3 including a cemented lens of a biconvex positive lens and a biconcave negative lens, and a biconvex positive lens, the fourth group G4 including a negative meniscus lens convex on the object side, and the convex group on the object side. It consists of a fifth lens group G5 consisting of a positive meniscus lens, and is used when zooming from the wide-angle end to the telephoto end.
The group G2 and the third group G3 move toward the object side while temporarily narrowing the gap between them, and the third group G3 and the fourth group G4 move toward the object side while widening the gap between them, and the fifth group G5 slightly moves. Move to the image side.

【００８５】非球面は、第１群Ｇ１の両凸正レンズの像
面側の面、第２群Ｇ２の両凸正レンズの物体側の面、第
４群Ｇ４の負メニスカスレンズの像面側の面、第５群Ｇ
５の正メニスカスレンズの像面側の面の４面に用いられ
ている。The aspherical surfaces are the image side of the biconvex positive lens of the first group G1, the object side of the biconvex positive lens of the second group G2, and the image side of the negative meniscus lens of the fourth group G4. Surface, fifth group G
It is used for four surfaces of the positive meniscus lens 5 on the image side.

【００８６】実施例６の光路折り曲げズーム光学系は、
図６に示すように、両凸正レンズと両凹負レンズと平行
平面板と等価な光路折り曲げプリズムＰからなる第１群
Ｇ１、開口絞りと、両凸正レンズと像面側に凸の負メニ
スカスレンズの接合レンズからなる第２群Ｇ２、物体側
に凸の負メニスカスレンズからなる第３群Ｇ３、両凸正
レンズからなる第４群Ｇ４からなり、広角端から望遠端
に変倍する際は、第２群Ｇ２と第３群Ｇ３は間の間隔を
広げながら物体側へ移動し、第４群Ｇ４は像面側に凸の
軌跡を描きつつ望遠側では物体側へ若干移動する。The optical path bending zoom optical system of the sixth embodiment is as follows:
As shown in FIG. 6, a first group G1 including a biconvex positive lens, a biconcave negative lens, and an optical path bending prism P equivalent to a plane parallel plate, an aperture stop, a biconvex positive lens, and a negative lens convex on the image plane side. A second group G2 including a cemented lens of a meniscus lens, a third group G3 including a negative meniscus lens having a convex surface on the object side, and a fourth group G4 including a biconvex positive lens when zooming from a wide-angle end to a telephoto end. The second lens group G2 and the third lens group G3 move toward the object side while increasing the distance between them, and the fourth lens group G4 moves slightly toward the object side on the telephoto side while drawing a convex locus on the image plane side.

【００８７】非球面は、第１群Ｇ１の両凹負レンズの物
体側の面、第２群Ｇ２の最も物体側の面、第３群Ｇ３の
負メニスカスレンズの像面側の面の３面に用いられてい
る。The aspherical surfaces are the three surfaces of the object-side surface of the biconcave negative lens of the first group G1, the most object-side surface of the second group G2, and the image-side surface of the negative meniscus lens of the third group G3. Is used for.

【００８８】実施例７の光路折り曲げズーム光学系は、
図７に示すように、物体側に凸の負メニスカスレンズと
平行平面板と等価な光路折り曲げプリズムＰからなる第
１−１群Ｇ１−１、両凹負レンズと両凸正レンズからな
る第１−２群Ｇ１−２、開口絞りと両凸正レンズと、両
凸正レンズと像面側に凸の負メニスカスレンズの接合レ
ンズと、物体側に凸の負メニスカスレンズ２枚からなる
第２群Ｇ２、像面側に凸の正メニスカスレンズからなる
第３群Ｇ３、像面側に凸の正メニスカスレンズからなる
第４群Ｇ４からなり、広角端から望遠端に変倍する際
は、第２群Ｇ２と第３群Ｇ３は間の間隔を一旦は広げ後
に狭めながら物体側へ移動する。The optical path bending zoom optical system of the seventh embodiment is
As shown in FIG. 7, a 1-1st group G1-1 including a negative meniscus lens convex on the object side and an optical path bending prism P equivalent to a plane parallel plate, a first biconcave negative lens and a biconvex positive lens. -Second group G1-2, a second group including an aperture stop and a biconvex positive lens, a cemented lens of a biconvex positive lens and a negative meniscus lens having a convex surface on the image side, and two negative meniscus lenses having a convex surface on the object side G2, a third group G3 composed of a positive meniscus lens having a convex surface on the image side, and a fourth group G4 composed of a positive meniscus lens having a convex surface on the image surface side. The group G2 and the third group G3 move toward the object side while widening the gap between them once and then narrowing them.

【００８９】非球面は、第１−１群Ｇ１−１の負メニス
カスレンズの像面側の面、第２群Ｇ２の最も物体側の
面、第４群Ｇ４の正メニスカスレンズの物体側の面の３
面に用いられている。The aspherical surface is the image-side surface of the negative meniscus lens of the 1-1st group G1-1, the most object-side surface of the second group G2, and the object-side surface of the positive meniscus lens of the fourth group G4. Of 3
It is used for the surface.

【００９０】実施例８の光路折り曲げズーム光学系は、
図８に示すように、物体側に凸の負メニスカスレンズと
平行平面板と等価な光路折り曲げプリズムＰからなる第
１−１群Ｇ１−１、両凹負レンズと物体側に凸の正メニ
スカスレンズからなる第１−２群Ｇ１−２、開口絞りと
両凸正レンズと、両凸正レンズと両凹負レンズの接合レ
ンズからなる第２群Ｇ２、像面側に凸の正メニスカスレ
ンズからなる第３群Ｇ３、像面側に凸の正メニスカスレ
ンズからなる第４群Ｇ４からなり、広角端から望遠端に
変倍する際は、第２群Ｇ２と第３群Ｇ３は間の間隔を一
旦は広げ後に狭めながら物体側へ移動する。The optical path bending zoom optical system of Example 8 is as follows:
As shown in FIG. 8, a 1-1st group G1-1 including a negative meniscus lens convex to the object side and an optical path bending prism P equivalent to a plane parallel plate, a biconcave negative lens and a positive meniscus lens convex to the object side. A first-second lens group G1-2, an aperture stop and a biconvex positive lens, a second lens group G2 composed of a cemented lens of a biconvex positive lens and a biconcave negative lens, and a positive meniscus lens convex on the image side. It is composed of a third group G3 and a fourth group G4 composed of a positive meniscus lens having a convex surface on the image plane side. When zooming from the wide-angle end to the telephoto end, the distance between the second group G2 and the third group G3 is once set. Moves to the object side after widening and narrowing.

【００９１】非球面は、第１−１群Ｇ１−１の負メニス
カスレンズの物体側の面、第２群Ｇ２の最も物体側の
面、第４群Ｇ４の正メニスカスレンズの像面側の面の３
面に用いられている。The aspherical surfaces are the object-side surface of the negative meniscus lens of the 1-1st group G1-1, the most object-side surface of the second group G2, and the image-side surface of the positive meniscus lens of the fourth group G4. Of 3
It is used for the surface.

【００９２】実施例９の光路折り曲げズーム光学系は、
図９に示すように、物体側に凸の負メニスカスレンズと
平行平面板と等価な光路折り曲げプリズムＰからなる第
１−１群Ｇ１−１、物体側に凸の負メニスカスレンズと
物体側に凸の正メニスカスレンズからなる第１−２群Ｇ
１−２、開口絞りと両凸正レンズからなる第２群Ｇ２、
両凸正レンズと物体側に凸の負メニスカスレンズと、両
凸正レンズと両凹負レンズの接合レンズからなる第３群
Ｇ３、像面側に凸の正メニスカスレンズからなる第４群
Ｇ４からなり、広角端から望遠端に変倍する際は、第２
群Ｇ２と第３群Ｇ３は間の間隔を一旦は広げ後に若干狭
めながら物体側へ移動する。The optical path bending zoom optical system of Example 9 is
As shown in FIG. 9, a 1-1st group G1-1 including a negative meniscus lens convex on the object side and an optical path bending prism P equivalent to a plane parallel plate, a negative meniscus lens convex on the object side and a convex on the object side. 1-2 Group G consisting of positive meniscus lenses
1-2, a second group G2 including an aperture stop and a biconvex positive lens,
From a third group G3 including a biconvex positive lens and a negative meniscus lens convex to the object side, a cemented lens of a biconvex positive lens and a biconcave negative lens, and a fourth group G4 including a positive meniscus lens convex to the image side. When zooming from the wide-angle end to the telephoto end,
The group G2 and the third group G3 move toward the object side while widening the distance between them once and then narrowing them slightly.

【００９３】非球面は、第１−２群Ｇ１−２の負メニス
カスレンズの像面側の面、第３群Ｇ２の最も物体側の
面、第４群Ｇ４の正メニスカスレンズの物体側の面の３
面に用いられている。The aspherical surface is the image-side surface of the negative meniscus lens of the first-second group G1-2, the most object-side surface of the third group G2, and the object-side surface of the positive meniscus lens of the fourth group G4. Of 3
It is used for the surface.

【００９４】実施例１０の光路折り曲げズーム光学系
は、図１０に示すように、物体側に凸の負メニスカスレ
ンズと平行平面板と等価な光路折り曲げプリズムＰから
なる第１−１群Ｇ１−１、物体側に凸の負メニスカスレ
ンズと物体側に凸の正メニスカスレンズからなる第１−
２群Ｇ１−２、開口絞りと、両凸正レンズと像面側に凸
の負メニスカスレンズの接合レンズからなる第２群Ｇ
２、物体側に凸の正メニスカスレンズと物体側に凸の負
メニスカスレンズと、両凸正レンズと両凹負レンズの接
合レンズからなる第３群Ｇ３、像面側に凸の正メニスカ
スレンズからなる第４群Ｇ４からなり、広角端から望遠
端に変倍する際は、第２群Ｇ２と第３群Ｇ３は間の間隔
を一旦は広げ後に狭めながら物体側へ移動する。As shown in FIG. 10, the optical path bending zoom optical system of the tenth embodiment includes a 1-1st group G1-1 composed of a negative meniscus lens convex on the object side and an optical path bending prism P equivalent to a plane parallel plate. , A negative meniscus lens convex to the object side and a positive meniscus lens convex to the object side
Second group G1-2, an aperture stop, and a second group G including a cemented lens of a biconvex positive lens and a negative meniscus lens convex on the image side.
2. Third lens group G3 consisting of a positive meniscus lens convex to the object side, a negative meniscus lens convex to the object side, and a cemented lens made up of a biconvex positive lens and a biconcave negative lens, from a positive meniscus lens convex to the image side When the magnification is changed from the wide-angle end to the telephoto end, the second group G2 and the third group G3 move toward the object side while narrowing the distance between them once and then narrowing the distance.

【００９５】非球面は、第１−２群Ｇ１−２の負メニス
カスレンズの像面側の面、第３群Ｇ２の最も物体側の
面、第４群Ｇ４の正メニスカスレンズの物体側の面の３
面に用いられている。The aspherical surface is the image-side surface of the negative meniscus lens of the first-second group G1-2, the most object-side surface of the third group G2, and the object-side surface of the positive meniscus lens of the fourth group G4. Of 3
It is used for the surface.

【００９６】実施例１１の光路折り曲げズーム光学系
は、図１１に示すように、物体側に凸の負メニスカスレ
ンズと平行平面板と等価な光路折り曲げプリズムＰから
なる第１−１群Ｇ１−１、物体側に凸の負メニスカスレ
ンズと物体側に凸の正メニスカスレンズからなる第１−
２群Ｇ１−２、開口絞りと、両凸正レンズと像面側に凸
の負メニスカスレンズの接合レンズからなる第２群Ｇ
２、物体側に凸の正メニスカスレンズと、凸平正レンズ
と平凹負レンズの接合レンズからなる第３群Ｇ３、両凸
正レンズからなる第４群Ｇ４からなり、広角端から望遠
端に変倍する際は、第２群Ｇ２は第３群Ｇ３は間の間隔
を一旦は広げ後に狭めながら物体側へ移動する。As shown in FIG. 11, the optical path bending zoom optical system of Example 11 is a first-first group G1-1 composed of a negative meniscus lens convex to the object side and an optical path bending prism P equivalent to a plane parallel plate. , A negative meniscus lens convex to the object side and a positive meniscus lens convex to the object side
Second group G1-2, an aperture stop, and a second group G including a cemented lens of a biconvex positive lens and a negative meniscus lens convex on the image side.
2. Consists of a positive meniscus lens convex on the object side, a third lens group G3 including a cemented plano-convex lens and a plano-concave negative lens, and a fourth lens group G4 including a biconvex positive lens. At the time of doubling, the second group G2 and the third group G3 move to the object side while once widening the interval between them and then narrowing them.

【００９７】非球面は、第１−２群Ｇ１−２の負メニス
カスレンズの像面側の面、第３群Ｇ３の正メニスカスレ
ンズの物体側の面、第４群Ｇ４の両凸正レンズの像面側
の面の３面に用いられている。The aspherical surfaces are the image-side surface of the negative meniscus lens of the first-second group G1-2, the object-side surface of the positive meniscus lens of the third group G3, and the biconvex positive lens of the fourth group G4. It is used for three surfaces of the image side.

【００９８】実施例１２の光路折り曲げズーム光学系
は、図１２に示すように、凹平負レンズと等価な光路折
り曲げプリズムＰからなる第１−１群Ｇ１−１、物体側
に凹の負メニスカスレンズと物体側に凹の正メニスカス
レンズの接合レンズからなる第１−２群Ｇ１−２、開口
絞りと、両凸正レンズと、物体側に凸の正メニスカスレ
ンズと物体側に凸の負メニスカスレンズの接合レンズと
からなる第２群Ｇ２、両凸正レンズからなる第３群Ｇ
３、像面側に凸の正メニスカスレンズからなる第４群Ｇ
４からなり、広角端から望遠端に変倍する際は、第２群
Ｇ２と第３群Ｇ３は間の間隔を一旦は広げ後に狭めなが
ら物体側へ移動する。As shown in FIG. 12, the optical path-bending zoom optical system according to Example 12 has a 1-1st group G1-1 composed of an optical path-bending prism P equivalent to a concave plano negative lens, and a negative meniscus concave on the object side. A first-second group G1-2 including a cemented lens of a lens and a positive meniscus lens concave to the object side, an aperture stop, a biconvex positive lens, a positive meniscus lens convex to the object side, and a negative meniscus convex to the object side. A second group G2 including a cemented lens and a third group G including a biconvex positive lens
3, the fourth group G composed of a positive meniscus lens convex on the image side
When the magnification is changed from the wide-angle end to the telephoto end, the second lens group G2 and the third lens group G3 move toward the object side while temporarily narrowing the distance between them.

【００９９】非球面は、第１−１群Ｇ１−１の光路折り
曲げプリズムＰの物体側の面、第２群Ｇ２の最も物体側
の面、第４群Ｇ４の正メニスカスレンズの像面側の面の
３面に用いられている。The aspherical surfaces are the object side surface of the optical path bending prism P of the 1-1st group G1-1, the most object side surface of the second group G2, and the image plane side of the positive meniscus lens of the fourth group G4. It is used for three surfaces.

【０１００】以下に、上記各実施例の数値データを示す
が、記号は上記の外、ｆは全系焦点距離、２ωは画角、
ＦNOはＦナンバー、ＷＥは広角端、ＳＴは中間状態、Ｔ
Ｅは望遠端、ｒ1 、ｒ2 …は各レンズ面の曲率半径、ｄ
1 、ｄ2 …は各レンズ面間の間隔、ｎd1、ｎd2…は各レ
ンズのｄ線の屈折率、νd1、νd2…は各レンズのアッベ
数である。なお、非球面形状は、ｘを光の進行方向を正
とした光軸とし、ｙを光軸と直交する方向にとると、下
記の式にて表される。Numerical data of each of the above-mentioned embodiments are shown below, with symbols other than the above, f is the focal length of the entire system, 2ω is the angle of view,
F NO is the F number, WE is the wide-angle end, ST is the intermediate state, T
E is the telephoto end, r 1 , r 2 ... Is the radius of curvature of each lens surface, d
1 , d 2 ... Intervals between lens surfaces, n d1 , n d2 ..., Refractive index of d line of each lens, ν d1 , ν d2, ... Abbe number of each lens. The aspherical shape is represented by the following formula, where x is an optical axis with the traveling direction of light being positive and y is a direction orthogonal to the optical axis.

【０１０１】ｘ＝（ｙ2 ／ｒ）／［１＋｛１−（Ｋ＋
１）（ｙ／ｒ）2 ｝1/2 ］＋A4ｙ4 ＋A6ｙ6 ＋A8ｙ8 ＋
A10ｙ10 ただし、ｒは近軸曲率半径、Ｋは円錐係数、A4、A6、
A8、A10 はそれぞれ４次、６次、８次、１０次の非球面
係数である。X = (y 2 / r) / [1+ {1- (K +
1) (y / r) 2 } 1/2 ] + A 4 y 4 + A 6 y 6 + A 8 y 8 +
A 10 y 10 However, r is a paraxial radius of curvature, K is a conic coefficient, A 4 , A 6 ,
A 8 and A 10 are aspherical coefficients of the 4th, 6th, 8th and 10th orders, respectively.

【０１０２】 実施例１ ｒ1 = -26.8147 ｄ1 = 3.8000 ｎd1 =1.73400 νd1 =51.47 ｒ2 = ∞（反射面） ｄ2 = 3.2000 ｎd2 =1.73400 νd2 =51.47 ｒ3 = 6.2254 ｄ3 = 1.7202 ｒ4 = 424.9864（非球面） ｄ4 = 2.4297 ｎd3 =1.84666 νd3 =23.78 ｒ5 = -48.1247 ｄ5 = （可変） ｒ6 = ∞（絞り） ｄ6 = 0.5000 ｒ7 = 17.8731（非球面） ｄ7 = 2.0000 ｎd4 =1.58913 νd4 =61.26 ｒ8 = -16.6911 ｄ8 = （可変） ｒ9 = 7.9903 ｄ9 = 6.2379 ｎd5 =1.48749 νd5 =70.23 ｒ10= -14.7007 ｄ10= 0.8488 ｎd6 =1.84666 νd6 =23.78 ｒ11= 7.0178 ｄ11= 1.1903 ｒ12= 11.2307 ｄ12= 1.6307 ｎd7 =1.84666 νd7 =23.78 ｒ13= -24.5400 ｄ13= （可変） ｒ14= 18.1763 ｄ14= 0.5000 ｎd8 =1.84666 νd8 =23.78 ｒ15= 5.9110（非球面） ｄ15= （可変） ｒ16= 14.1876 ｄ16= 3.0000 ｎd9 =1.58913 νd9 =61.26 ｒ17= -7.1178（非球面） ｄ17= 0.5006 ｒ18= ∞ ｄ18= 0.8000 ｎd10=1.51633 νd10=64.14 ｒ19= ∞ ｄ19= 1.8000 ｎd11=1.54771 νd11=62.84 ｒ20= ∞ ｄ20= 0.5000 ｒ21= ∞ ｄ21= 0.5000 ｎd12=1.51633 νd12=64.14 ｒ22= ∞ ｄ22= 1.1914 ｒ23= ∞（像面） 非球面係数 第４面 Ｋ = 0.0195 A4 = 5.4111 ×10-4 A6 = 2.1984 ×10-6 A8 = 4.5957 ×10-7 A10=-1.0754 ×10-8 第７面 Ｋ = 5.8821 A4 =-2.7575 ×10-4 A6 = 5.8194 ×10-6 A8 =-7.9649 ×10-7 A10= 3.4848 ×10-8 第１５面 Ｋ =-3.6043 A4 = 2.6150 ×10-3 A6 =-8.5623 ×10-6 A8 =-2.8972 ×10-6 A10= 1.5174 ×10-7 第１７面 Ｋ = 0.8882 A4 = 1.1140 ×10-3 A6 =-8.5962 ×10-6 A8 = 3.9677 ×10-7 A10= 3.1086 ×10-8 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 4.59000 8.95000 13.23000 ＦNO 2.8316 3.8724 4.6438 ２ω (°) 65.5 34.0 23.0 ｄ5 12.93741 5.34873 2.00000 ｄ8 2.61607 2.85689 0.50000 ｄ13 1.09671 5.22639 10.38165 ｄ15 1.00016 4.21405 4.71724 。Example 1 r 1 = -26.8147 d 1 = 3.8000 n d1 = 1.73400 ν d1 = 51.47 r 2 = ∞ (reflection surface) d 2 = 3.2000 n d2 = 1.73400 ν d2 = 51.47 r 3 = 6.2254 d 3 = 1.7202 r 4 = 424.9864 (aspherical surface) d 4 = 2.4297 n d3 = 1.84666 ν d3 = 23.78 r 5 = -48.1247 d 5 = (variable) r 6 = ∞ (aperture) d 6 = 0.5000 r 7 = 17.8731 (aspherical surface) ) D 7 = 2.0000 n d4 = 1.58913 ν d4 = 61.26 r 8 = -16.6911 d 8 = (variable) r 9 = 7.9903 d 9 = 6.2379 n d5 = 1.48749 ν d5 = 70.23 r 10 = -14.7007 d 10 = 0.8488 n d6 = 1.84666 ν d6 = 23.78 r 11 = 7.0178 d 11 = 1.1903 r 12 = 11.2307 d 12 = 1.6307 n d7 = 1.84666 ν d7 = 23.78 r 13 = -24.5400 d 13 = (variable) r 14 = 18.1763 d 14 = 0.5000 n d8 = 1.84666 ν d8 = 23.78 r 15 = 5.9110 (aspherical surface) d 15 = (variable) r 16 = 14.1876 d 16 = 3.0000 n d9 = 1.58913 ν d9 = 61.26 r 17 = -7.1178 (aspherical surface) d 17 = 0.5006 r 18 = ∞ d 18 = 0.8000 n d10 = 1.51633 ν d10 = 64.14 r 19 = ∞ d 19 = 1.8000 nd 11 = 1.54771 ν d11 = 62.84 r 20 = ∞ d 20 = 0.5000 r 21 = ∞ d 21 = 0.5000 n d12 = 1.51633 ν d12 = 64.14 r 22 = ∞ d 22 = 1.1914 r 23 = ∞ (image plane) Aspherical coefficient 4th surface K = 0.0195 A 4 = 5.4111 × 10 -4 A 6 = 2.1984 × 10 -6 A 8 = 4.5957 × 10 -7 A 10 = -1.0754 × 10 -8 7th Surface K = 5.8821 A 4 = -2.7575 × 10 -4 A 6 = 5.8194 × 10 -6 A 8 = -7.9649 × 10 -7 A 10 = 3.4848 × 10 -8 15th surface K = -3.6043 A 4 = 2.6150 × 10 -3 A 6 = -8.5623 × 10 -6 A 8 = -2.8972 × 10 -6 A 10 = 1.5174 × 10 -7 17th surface K = 0.8882 A 4 = 1.1140 × 10 -3 A 6 = -8.5962 × 10 -6 A 8 = 3.9677 × 10 -7 A 10 = 3.1086 × 10 -8 Zoom data (∞) WEST TE f (mm) 4.59000 8.95000 13.23000 F NO 2.8316 3.8724 4.6438 2ω (°) 65.5 34.0 23.0 d 5 12.93741 5.34873 2.00000 d 8 2.61607 2.85689 0.50000 d 13 1.09671 5.22639 10.38165 d 15 1.00016 4.21405 4.71724.

【０１０３】 実施例２ ｒ1 = -129.7294 ｄ1 = 4.5500 ｎd1 =1.80400 νd1 =46.57 ｒ2 = ∞（反射面） ｄ2 = 4.0019 ｎd2 =1.80400 νd2 =46.57 ｒ3 = 5.3898 ｄ3 = 1.6465 ｒ4 = 30.0332（非球面） ｄ4 = 1.4609 ｎd3 =1.84666 νd3 =23.78 ｒ5 = -35.8611 ｄ5 = （可変） ｒ6 = ∞（絞り） ｄ6 = （可変） ｒ7 = 9.6063（非球面） ｄ7 = 2.7296 ｎd4 =1.48749 νd4 =70.23 ｒ8 = -30.8421 ｄ8 = 0.1469 ｒ9 = 10.1172 ｄ9 = 2.1277 ｎd5 =1.69680 νd5 =55.53 ｒ10= 97.1974 ｄ10= 0.0500 ｒ11= 12.1982 ｄ11= 0.7949 ｎd6 =1.84666 νd6 =23.78 ｒ12= 5.7271 ｄ12= （可変） ｒ13= 14.2960 ｄ13= 4.0342 ｎd7 =1.48749 νd7 =70.23 ｒ14= -15.7323 ｄ14= 0.1401 ｒ15= -18.5671 ｄ15= 1.1241 ｎd8 =1.84666 νd8 =23.78 ｒ16= -29.8834 ｄ16= （可変） ｒ17= 46.3841（非球面） ｄ17= 1.1752 ｎd9 =1.58913 νd9 =61.26 ｒ18= 541.6142 ｄ18= 0.4453 ｒ19= ∞ ｄ19= 0.8000 ｎd10=1.51633 νd10=64.14 ｒ20= ∞ ｄ20= 1.8000 ｎd11=1.54771 νd11=62.84 ｒ21= ∞ ｄ21= 0.5000 ｒ22= ∞ ｄ22= 0.5000 ｎd12=1.51633 νd12=64.14 ｒ23= ∞ ｄ23= 1.2588 ｒ24= ∞（像面） 非球面係数 第４面 Ｋ =42.6072 A4 = 4.5281 ×10-4 A6 =-1.2752 ×10-6 A8 = 2.9327 ×10-7 A10= 0 第７面 Ｋ = 0 A4 =-2.9136 ×10-4 A6 =-7.7511 ×10-7 A8 = 2.4221 ×10-8 A10= 0 第１７面 Ｋ = 0 A4 =-8.0585 ×10-4 A6 = 1.7583 ×10-5 A8 =-1.1309 ×10-6 A10= 0 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 4.71141 7.84455 13.21508 ＦNO 2.8000 3.6612 5.0650 ２ω (°) 67.8 41.2 24.8 ｄ6 7.09024 5.59391 1.24849 ｄ12 3.08267 9.70509 10.04403 ｄ16 0.98577 1.28696 8.72623 。Example 2 r 1 = -129.7294 d 1 = 4.5500 n d1 = 1.80400 ν d1 = 46.57 r 2 = ∞ (reflection surface) d 2 = 4.0019 n d2 = 1.80400 ν d2 = 46.57 r 3 = 5.3898 d 3 = 1.6465 r 4 = 30.0332 (aspherical surface) d 4 = 1.4609 n d3 = 1.84666 ν d3 = 23.78 r 5 = -35.8611 d 5 = (variable) r 6 = ∞ (aperture) d 6 = (variable) r 7 = 9.6063 ( Aspherical surface) d 7 = 2.7296 n d4 = 1.48749 ν d4 = 70.23 r 8 = -30.8421 d 8 = 0.1469 r 9 = 10.1172 d 9 = 2.1277 n d5 = 1.69680 ν d5 = 55.53 r 10 = 97.1974 d 10 = 0.0500 r 11 = 12.1982 d 11 = 0.7949 n d6 = 1.84666 ν d6 = 23.78 r 12 = 5.7271 d 12 = (variable) r 13 = 14.2960 d 13 = 4.0342 n d7 = 1.48749 ν d7 = 70.23 r 14 = -15.7323 d 14 = 0.1401 r 15 = -18.5671 d 15 = 1.1241 n d8 = 1.84666 ν d8 = 23.78 r 16 = -29.8834 d 16 = (variable) r 17 = 46.3841 (aspherical) d 17 = 1.1752 n d9 = 1.58913 ν d9 = 61.26 r 18 = 541.6142 d 18 = 0.4453 r 19 = ∞ d 19 = 0.8000 n d10 = 1.51633 ν d10 = 64.14 r 20 = ∞ d 20 = 1.8000 n d11 = 1.54771 ν d11 = 62.84 r 21 = ∞ d 21 = 0.5000 r 22 = ∞ d 22 = 0.5000 n d12 = 1.51633 ν d12 = 64.14 r 23 = ∞ d 23 = 1.2588 r 24 = ∞ (image plane) Aspheric coefficient 4th surface K = 42.6072 A 4 = 4.5281 × 10 -4 A 6 = -1.2752 × 10 -6 A 8 = 2.9327 × 10 -7 A 10 = 0 7th surface K = 0 A 4 = -2.9136 × 10 -4 A 6 = -7.7511 × 10 -7 A 8 = 2.4221 × 10 -8 A 10 = 0 17th surface K = 0 A 4 = -8.0585 × 10 -4 A 6 = 1.7583 × 10 -5 A 8 = -1.1309 × 10 -6 A 10 = 0 Zoom data (∞) WE ST TE f (mm) 4.71141 7.84455 13.21508 F NO 2.8000 3.6612 5.0650 2ω (°) 67.8 41.2 24.8 d 6 7.09024 5.59391 1.24849 d 12 3.08267 9.70509 10.04403 d 16 0.98577 1.28696 8.72623.

【０１０４】 実施例３ ｒ1 = 22.0799 ｄ1 = 0.7823 ｎd1 =1.80400 νd1 =46.57 ｒ2 = 7.0105 ｄ2 = 1.1905 ｒ3 = ∞ ｄ3 = 3.8000 ｎd2 =1.80400 νd2 =46.57 ｒ4 = ∞（反射面） ｄ4 = 3.4483 ｎd3 =1.80400 νd3 =46.57 ｒ5 = ∞ ｄ5 = 0.4000 ｒ6 = -43.4610 ｄ6 = 0.7742 ｎd4 =1.77250 νd4 =49.60 ｒ7 = 9.6384 ｄ7 = 0.6369 ｒ8 = 19.1908（非球面） ｄ8 = 1.6810 ｎd5 =1.84666 νd5 =23.78 ｒ9 = -40.1274 ｄ9 = （可変） ｒ10= ∞（絞り） ｄ10= 0.5000 ｒ11= 85.1662 ｄ11= 1.5117 ｎd6 =1.58913 νd6 =61.26 ｒ12= -18.3807 ｄ12= （可変） ｒ13= 5.5347（非球面） ｄ13= 2.9473 ｎd7 =1.48749 νd7 =70.23 ｒ14= -102.8346 ｄ14= 0.1500 ｒ15= 68.5128 ｄ15= 3.4582 ｎd8 =1.84666 νd8 =23.78 ｒ16= 5.6774 ｄ16= 2.1376 ｒ17= 7.8453 ｄ17= 2.3148 ｎd9 =1.60542 νd9 =45.99 ｒ18= -12.6010 ｄ18= 0.5441 ｒ19= -6.0465 ｄ19= 0.7255 ｎd10=1.61800 νd10=63.33 ｒ20= -17.9513 ｄ20= （可変） ｒ21= -17.2238（非球面） ｄ21= 1.4117 ｎd11=1.58913 νd11=61.26 ｒ22= -9.8048 ｄ22= 0.5599 ｒ23= ∞ ｄ23= 0.8000 ｎd12=1.51633 νd12=64.14 ｒ24= ∞ ｄ24= 1.8000 ｎd13=1.54771 νd13=62.84 ｒ25= ∞ ｄ25= 0.5000 ｒ26= ∞ ｄ26= 0.5000 ｎd14=1.51633 νd14=64.14 ｒ27= ∞ ｄ27= 1.3641 ｒ28= ∞（像面） 非球面係数 第８面 Ｋ = 1.5876 A4 = 2.6616 ×10-4 A6 = 3.3939 ×10-6 A8 =-1.0023 ×10-7 A10= 0 第１３面 Ｋ = 0 A4 =-2.7230 ×10-4 A6 =-5.7432 ×10-6 A8 =-3.4301 ×10-7 A10= 0 第２１面 Ｋ = 0 A4 =-8.9975 ×10-4 A6 =-1.8358 ×10-5 A8 = 1.4143 ×10-6 A10= 0 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 4.60758 7.85021 13.40785 ＦNO 2.8000 3.4489 4.6187 ２ω (°) 65.3 39.0 22.9 ｄ9 14.75212 6.67783 2.00000 ｄ12 0.67500 4.26744 1.54139 ｄ20 1.35767 6.03580 13.51290 。Example 3 r 1 = 22.0799 d 1 = 0.7823 n d1 = 1.80400 ν d1 = 46.57 r 2 = 7.0105 d 2 = 1.1905 r 3 = ∞ d 3 = 3.8000 n d2 = 1.80400 ν d2 = 46.57 r 4 = ∞ (Reflecting surface) d 4 = 3.4483 n d3 = 1.80400 ν d3 = 46.57 r 5 = ∞ d 5 = 0.4000 r 6 = -43.4610 d 6 = 0.7742 n d4 = 1.77250 ν d4 = 49.60 r 7 = 9.6384 d 7 = 0.6369 r 8 = 19.1908 (aspherical surface) d 8 = 1.6810 n d5 = 1.84666 ν d5 = 23.78 r 9 = -40.1274 d 9 = (variable) r 10 = ∞ (aperture) d 10 = 0.5000 r 11 = 85.1662 d 11 = 1.5117 n d6 = 1.58913 ν d6 = 61.26 r 12 = -18.3807 d 12 = (variable) r 13 = 5.5347 (aspherical surface) d 13 = 2.9473 n d7 = 1.48749 ν d7 = 70.23 r 14 = -102.8346 d 14 = 0.1500 r 15 = 68.5128 d 15 = 3.4582 n d8 = 1.84666 ν d8 = 23.78 r 16 = 5.6774 d 16 = 2.1376 r 17 = 7.8453 d 17 = 2.3148 n d9 = 1.60542 ν d9 = 45.99 r 18 = -12.6010 d 18 = 0.5441 r 19 =- 6.0465 d 19 = 0.7255 n d10 = 1.61800 ν d10 = 63.33 r 20 = -17. 9513 d 20 = (variable) r 21 = -17.2238 (aspherical surface) d 21 = 1.4117 n d11 = 1.58913 ν d11 = 61.26 r 22 = -9.8048 d 22 = 0.5599 r 23 = ∞ d 23 = 0.8000 n d12 = 1.51633 ν d12 = 64.14 r 24 = ∞ d 24 = 1.8000 n d13 = 1.54771 ν d13 = 62.84 r 25 = ∞ d 25 = 0.5000 r 26 = ∞ d 26 = 0.5000 n d14 = 1.51633 ν d14 = 64.14 r 27 = ∞ d 27 = 1.3641 r 28 = ∞ (image plane) Aspheric coefficient 8th surface K = 1.5876 A 4 = 2.6616 × 10 -4 A 6 = 3.3939 × 10 -6 A 8 = -1.0023 × 10 -7 A 10 = 0 13th surface K = 0 A 4 = -2.7230 × 10 -4 A 6 = -5.7432 × 10 -6 A 8 = -3.4301 × 10 -7 A 10 = 0 21st surface K = 0 A 4 = -8.9975 × 10 -4 A 6 = -1.8358 × 10 -5 A 8 = 1.4143 × 10 -6 A 10 = 0 Zoom data (∞) WE ST TE f (mm) 4.60758 7.85021 13.40785 F NO 2.8000 3.4489 4.6187 2ω (°) 65.3 39.0 22.9 d 9 14.75212 6.67783 2.00000 d 12 0.67500 4.26744 1.54139 d 20 1.35767 6.03580 13.51290.

【０１０５】 実施例４ ｒ1 = 29.0184 ｄ1 = 0.7437 ｎd1 =1.80400 νd1 =46.57 ｒ2 = 7.3275 ｄ2 = 1.3049 ｒ3 = ∞ ｄ3 = 4.0000 ｎd2 =1.80400 νd2 =46.57 ｒ4 = ∞（反射面） ｄ4 = 3.5133 ｎd3 =1.80400 νd3 =46.57 ｒ5 = ∞ ｄ5 = 0.3000 ｒ6 = -31.2038 ｄ6 = 0.7673 ｎd4 =1.80400 νd4 =46.57 ｒ7 = 15.2085 ｄ7 = 1.5760 ｒ8 = 33.1818（非球面） ｄ8 = 1.5628 ｎd5 =1.84666 νd5 =23.78 ｒ9 = -29.4113 ｄ9 = （可変） ｒ10= ∞（絞り） ｄ10= 0.5000 ｒ11= 20.3172（非球面） ｄ11= 1.9876 ｎd6 =1.58913 νd6 =61.26 ｒ12= -14.3558 ｄ12= 0.1387 ｒ13= 7.0863 ｄ13= 2.5021 ｎd7 =1.48749 νd7 =70.23 ｒ14= -521.1337 ｄ14= 0.0001 ｒ15= 217.6721 ｄ15= 5.9501 ｎd8 =1.84666 νd8 =23.78 ｒ16= 4.5340 ｄ16= （可変） ｒ17= 10.1062 ｄ17= 1.8686 ｎd9 =1.60300 νd9 =65.44 ｒ18= 46.5940 ｄ18= （可変） ｒ19= -22.5387（非球面） ｄ19= 2.3721 ｎd10=1.58913 νd10=61.26 ｒ20= -5.8538 ｄ20= 0.4297 ｒ21= ∞ ｄ21= 0.8000 ｎd11=1.51633 νd11=64.14 ｒ22= ∞ ｄ22= 0.8000 ｎd12=1.54771 νd12=62.84 ｒ23= ∞ ｄ23= 0.5000 ｒ24= ∞ ｄ24= 0.5000 ｎd13=1.51633 νd13=64.14 ｒ25= ∞ ｄ25= 1.3824 ｒ27= ∞（像面） 非球面係数 第８面 Ｋ = 1.9221 A4 = 1.0674 ×10-4 A6 = 7.5509 ×10-7 A8 =-6.9692 ×10-8 A10= 0 第１１面 Ｋ = 0 A4 =-1.4582 ×10-4 A6 = 4.2034 ×10-8 A8 = 1.1204 ×10-8 A10= 0 第１９面 Ｋ = 0 A4 =-1.8514 ×10-3 A6 = 6.5803 ×10-6 A8 =-9.0686 ×10-7 A10= 0 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 4.65117 7.85007 13.29161 ＦNO 2.5000 3.4944 4.8337 ２ω (°) 68.4 41.7 24.7 ｄ9 13.35295 7.17214 2.00000 ｄ16 1.22323 4.89168 2.01917 ｄ18 0.94992 3.89804 12.56077 。Example 4 r 1 = 29.0184 d 1 = 0.7437 n d1 = 1.80400 ν d1 = 46.57 r 2 = 7.3275 d 2 = 1.3049 r 3 = ∞ d 3 = 4.0000 n d2 = 1.80400 ν d2 = 46.57 r 4 = ∞ (Reflecting surface) d 4 = 3.5133 n d3 = 1.80400 ν d3 = 46.57 r 5 = ∞ d 5 = 0.3000 r 6 = -31.2038 d 6 = 0.7673 n d4 = 1.80400 ν d4 = 46.57 r 7 = 15.2085 d 7 = 1.5760 r 8 = 33.1818 (aspherical surface) d 8 = 1.5628 n d5 = 1.84666 ν d5 = 23.78 r 9 = -29.4113 d 9 = (variable) r 10 = ∞ (aperture) d 10 = 0.5000 r 11 = 20.3172 (aspherical surface) d 11 = 1.9876 n d6 = 1.58913 ν d6 = 61.26 r 12 = -14.3558 d 12 = 0.1387 r 13 = 7.0863 d 13 = 2.5021 n d7 = 1.48749 ν d7 = 70.23 r 14 = -521.1337 d 14 = 0.0001 r 15 = 217.6721 d 15 = 5.9501 n d8 = 1.84666 ν d8 = 23.78 r 16 = 4.5340 d 16 = ( variable) r 17 = 10.1062 d 17 = 1.8686 n d9 = 1.60300 ν d9 = 65.44 r 18 = 46.5940 d 18 = ( variable) r 19 = -22.5387 (aspherical surface) d 19 = 2.3721 n d10 = 1.58913 ν d10 = 61.26 r 20 = -5.8538 d 20 = 0.4297 r 21 = ∞ d 21 = 0.8000 n d11 = 1.51633 ν d11 = 64.14 r 22 = ∞ d 22 = 0.8000 n d12 = 1.54771 ν d12 = 62.84 r 23 = ∞ d 23 = 0.5000 r 24 = ∞ d 24 = 0.5000 n d13 = 1.51633 ν d13 = 64.14 r 25 = ∞ d 25 = 1.3824 r 27 = ∞ ( image plane) aspheric coefficients eighth surface K = 1.9221 A 4 = 1.0674 × 10 - 4 A 6 = 7.5509 × 10 -7 A 8 = -6.9692 × 10 -8 A 10 = 0 11th surface K = 0 A 4 = -1.4582 × 10 -4 A 6 = 4.2034 × 10 -8 A 8 = 1.1204 × 10 -8 A 10 = 0 19th surface K = 0 A 4 = -1.8514 × 10 -3 A 6 = 6.5803 × 10 -6 A 8 = -9.0686 × 10 -7 A 10 = 0 Zoom data (∞) west TE f (mm) 4.65117 7.85007 13.29161 F NO 2.5000 3.4944 4.8337 2ω (°) 68.4 41.7 24.7 d 9 13.35295 7.17214 2.00000 d 16 1.22323 4.89168 2.01917 d 18 0.94992 3.89804 12.56077.

【０１０６】 実施例５ ｒ1 = 15.9959 ｄ1 = 2.0000 ｎd1 =1.84666 νd1 =23.78 ｒ2 = 17.9366（非球面） ｄ2 = 0.8000 ｒ3 = 122.3665 ｄ3 = 1.0000 ｎd2 =1.72916 νd2 =54.68 ｒ4 = 6.1500 ｄ4 = 1.9000 ｒ5 = ∞ ｄ5 = 4.1000 ｎd3 =1.56883 νd3 =56.36 ｒ6 = ∞（反射面） ｄ6 = 3.9000 ｎd4 =1.56883 νd4 =56.36 ｒ7 = ∞ ｄ7 = （可変） ｒ8 = ∞（絞り） ｄ8 = 0.5928 ｒ9 = 14.1418（非球面） ｄ9 = 3.0000 ｎd5 =1.80610 νd5 =40.92 ｒ10= -138.1914 ｄ10= （可変） ｒ11= 9.2691 ｄ11= 3.2000 ｎd6 =1.48749 νd6 =70.23 ｒ12= -18.4588 ｄ12= 1.0064 ｎd7 =1.84666 νd7 =23.78 ｒ13= 7.4386 ｄ13= 0.5000 ｒ14= 9.1725 ｄ14= 2.4000 ｎd8 =1.80518 νd8 =25.42 ｒ15= -16.4170 ｄ15= （可変） ｒ16= 44.6119 ｄ16= 0.8000 ｎd9 =1.84666 νd9 =23.78 ｒ17= 8.9511（非球面） ｄ17= （可変） ｒ18= 11.2550 ｄ18= 2.6000 ｎd10=1.58913 νd10=61.26 ｒ19= 673.2282（非球面） ｄ19= （可変） ｒ20= ∞ ｄ20= 1.5000 ｎd11=1.51633 νd11=64.14 ｒ21= ∞ ｄ21= 1.4400 ｎd12=1.54771 νd12=62.84 ｒ22= ∞ ｄ22= 0.8000 ｒ23= ∞ ｄ23= 0.8000 ｎd13=1.51633 νd13=64.14 ｒ24= ∞ ｄ24= 1.0000 ｒ25= ∞（像面） 非球面係数 第２面 Ｋ = 0 A4 =-2.1855 ×10-4 A6 = 3.4923 ×10-7 A8 = 0 A10= 0 第９面 Ｋ = 5.1530 A4 =-2.4340 ×10-4 A6 =-7.4872 ×10-6 A8 = 2.0515 ×10-7 A10=-1.0188 ×10-8 第１７面 Ｋ =-3.7152 A4 = 1.2209 ×10-3 A6 =-1.7576 ×10-5 A8 = 2.5810 ×10-6 A10=-1.2193 ×10-7 第１９面 Ｋ = 1.4583 A4 =-1.5578 ×10-4 A6 =-1.1072 ×10-5 A8 = 5.6481 ×10-7 A10=-8.6742 ×10-9 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 5.43000 10.61200 15.80000 ＦNO 2.7116 3.7726 4.5293 ２ω (°) 63.5 35.7 24.5 ｄ7 13.12435 4.47821 0.50000 ｄ10 0.81880 1.71785 0.50000 ｄ15 0.60000 2.00387 4.09707 ｄ17 1.40000 8.20925 11.93740 ｄ19 2.71758 2.25155 1.62627 。Example 5 r 1 = 15.9959 d 1 = 2.0000 n d1 = 1.84666 ν d1 = 23.78 r 2 = 17.9366 (aspherical surface) d 2 = 0.8000 r 3 = 122.3665 d 3 = 1.0000 n d2 = 1.72916 ν d2 = 54.68 r 4 = 6.1500 d 4 = 1.9000 r 5 = ∞ d 5 = 4.1000 n d3 = 1.56883 ν d3 = 56.36 r 6 = ∞ (reflection surface) d 6 = 3.9000 n d4 = 1.56883 ν d4 = 56.36 r 7 = ∞ d 7 = (Variable) r 8 = ∞ (aperture) d 8 = 0.5928 r 9 = 14.1418 (aspherical surface) d 9 = 3.0000 n d5 = 1.80610 ν d5 = 40.92 r 10 = -138.1914 d 10 = (variable) r 11 = 9.2691 d 11 = 3.2000 n d6 = 1.48749 ν d6 = 70.23 r 12 = -18.4588 d 12 = 1.0064 nd d7 = 1.84666 ν d7 = 23.78 r 13 = 7.4386 d 13 = 0.5000 r 14 = 9.1725 d 14 = 2.4000 n d8 = 1.80518 ν d8 = 25.42 r 15 = -16.4170 d 15 = (variable) r 16 = 44.6119 d 16 = 0.8000 n d9 = 1.84666 ν d9 = 23.78 r 17 = 8.9511 (aspherical surface) d 17 = (variable) r 18 = 11.2550 d 18 = 2.6000 n d10 = 1.58913 ν d10 = 61.26 r 19 = 673.2282 ( Aspherical surface) d 19 = (variable) r 20 = ∞ d 20 = 1.5000 n d11 = 1.51633 ν d11 = 64.14 r 21 = ∞ d 21 = 1.4400 n d12 = 1.54771 ν d12 = 62.84 r 22 = ∞ d 22 = 0.8000 r 23 = ∞ d 23 = 0.8000 n d13 = 1.51633 ν d13 = 64.14 r 24 = ∞ d 24 = 1.0000 r 25 = ∞ (image plane) Aspheric coefficient second surface K = 0 A 4 = -2.1855 × 10 -4 A 6 = 3.4923 × 10 -7 A 8 = 0 A 10 = 0 9th surface K = 5.1530 A 4 = -2.4340 × 10 -4 A 6 = -7.4872 × 10 -6 A 8 = 2.0515 × 10 -7 A 10 = -1.0188 × 10 -8 17th surface K = -3.7152 A 4 = 1.2209 × 10 -3 A 6 = -1.7576 × 10 -5 A 8 = 2.5810 × 10 -6 A 10 = -1.2193 × 10 -7 19th surface K = 1.4583 A 4 = -1.5578 × 10 -4 A 6 = -1.1072 × 10 -5 A 8 = 5.6481 × 10 -7 A 10 = -8.6742 × 10 -9 Zoom data (∞) WE ST TE f (mm) 5.43000 10.61200 15.80000 F NO 2.7116 3.7726 4.5293 2ω (°) 63.5 35.7 24.5 d 7 13.12435 4.47821 0.50000 d 10 0.81880 1.71785 0.50000 d 15 0.60000 2.00387 4.09707 d 17 1.40000 8.20925 11.93740 d 19 2.71758 2.25 155 1.62627.

【０１０７】 実施例６ ｒ1 = 49.3427 ｄ1 = 2.0000 ｎd1 =1.84666 νd1 =23.78 ｒ2 = -115.4656 ｄ2 = 0.4000 ｒ3 = -52.5304（非球面） ｄ3 = 1.0000 ｎd2 =1.69350 νd2 =53.21 ｒ4 = 5.8428 ｄ4 = 1.8000 ｒ5 = ∞ ｄ5 = 4.0000 ｎd3 =1.56883 νd3 =56.36 ｒ6 = ∞（反射面） ｄ6 = 3.8000 ｎd4 =1.56883 νd4 =56.36 ｒ7 = ∞ ｄ7 = （可変） ｒ8 = ∞（絞り） ｄ8 = 0.6000 ｒ9 = 8.0295（非球面） ｄ9 = 2.8000 ｎd5 =1.69350 νd5 =53.21 ｒ10= -5.9145 ｄ10= 0.8000 ｎd6 =1.80440 νd6 =39.59 ｒ11= -12.3640 ｄ11= （可変） ｒ12= 26.8805 ｄ12= 0.8000 ｎd7 =1.84666 νd7 =23.78 ｒ13= 7.1849（非球面） ｄ13= （可変） ｒ14= 10.7803 ｄ14= 3.1000 ｎd8 =1.48749 νd8 =70.23 ｒ15= -52.9481 ｄ15= （可変） ｒ16= ∞ ｄ16= 1.5000 ｎd9 =1.51633 νd9 =64.14 ｒ17= ∞ ｄ17= 1.4400 ｎd10=1.54771 νd10=62.84 ｒ18= ∞ ｄ18= 0.8000 ｒ19= ∞ ｄ19= 0.8000 ｎd11=1.51633 νd11=64.14 ｒ20= ∞ ｄ20= 1.0000 ｒ21= ∞（像面） 非球面係数 第３面 Ｋ = 0 A4 = 2.6048 ×10-4 A6 =-3.2365 ×10-6 A8 = 2.2913 ×10-8 A10= 0 第９面 Ｋ = 0 A4 =-3.0615 ×10-4 A6 =-2.0330 ×10-6 A8 =-1.0403 ×10-7 A10= 0 第１３面 Ｋ =-3.5241 A4 = 1.8328 ×10-3 A6 =-1.6164 ×10-5 A8 = 3.5495 ×10-6 A10=-1.2410 ×10-7 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 5.38001 8.50001 13.45001 ＦNO 3.0358 3.8702 4.5606 ２ω (°) 65.8 43.8 28.4 ｄ7 11.53527 6.15290 0.50000 ｄ11 2.10162 2.49863 3.68430 ｄ13 3.96820 9.09478 10.56416 ｄ15 1.75491 1.61369 4.61155 。Example 6 r 1 = 49.3427 d 1 = 2.0000 n d1 = 1.84666 ν d1 = 23.78 r 2 = -115.4656 d 2 = 0.4000 r 3 = -52.5304 (aspherical surface) d 3 = 1.0000 n d2 = 1.69350 ν d2 = 53.21 r 4 = 5.8428 d 4 = 1.8000 r 5 = ∞ d 5 = 4.0000 n d3 = 1.56883 ν d3 = 56.36 r 6 = ∞ (reflection surface) d 6 = 3.8000 n d4 = 1.56883 ν d4 = 56.36 r 7 = ∞ d 7 = (variable) r 8 = ∞ (aperture) d 8 = 0.6000 r 9 = 8.0295 (aspherical surface) d 9 = 2.8000 n d5 = 1.69350 ν d5 = 53.21 r 10 = -5.9145 d 10 = 0.8000 n d6 = 1.80440 ν d6 = 39.59 r 11 = -12.3640 d 11 = (variable) r 12 = 26.8805 d 12 = 0.8000 n d7 = 1.84666 ν d7 = 23.78 r 13 = 7.1849 (aspherical) d 13 = (variable) r 14 = 10.7803 d 14 = 3.1000 n d8 = 1.48749 ν d8 = 70.23 r 15 = -52.9481 d 15 = (variable) r 16 = ∞ d 16 = 1.5000 n d9 = 1.51633 ν d9 = 64.14 r 17 = ∞ d 17 = 1.4400 n d10 = 1.54771 ν d10 = 62.84 r 18 = ∞ d 18 = 0.8000 r 19 = ∞ d 19 = 0.8000 d11 = 1.51633 ν d11 = 64.14 r 20 = ∞ d 20 = 1.0000 r 21 = ∞ ( image plane) aspherical coefficients third surface K = 0 A 4 = 2.6048 × 10 -4 A 6 = -3.2365 × 10 -6 A 8 = 2.2913 × 10 -8 A 10 = 0 9th surface K = 0 A 4 = -3.0615 × 10 -4 A 6 = -2.0330 × 10 -6 A 8 = -1.0403 × 10 -7 A 10 = 0 13th Surface K = -3.5241 A 4 = 1.8328 × 10 -3 A 6 = -1.6164 × 10 -5 A 8 = 3.5495 × 10 -6 A 10 = -1.2410 × 10 -7 Zoom data (∞) WE ST TE f (mm ) 5.38001 8.50001 13.45001 F NO 3.0358 3.8702 4.5606 2ω (°) 65.8 43.8 28.4 d 7 11.53527 6.15290 0.50000 d 11 2.10162 2.49863 3.68430 d 13 3.96820 9.09478 10.56416 d 15 1.75491 1.61369 4.61155.

【０１０８】 実施例７ ｒ1 = 21.0760 ｄ1 = 1.4000 ｎd1 =1.74320 νd1 =49.34 ｒ2 = 7.9352（非球面） ｄ2 = 2.8000 ｒ3 = ∞ ｄ3 = 6.5000 ｎd2 =1.56883 νd2 =56.36 ｒ4 = ∞（反射面） ｄ4 = 6.0000 ｎd3 =1.56883 νd3 =56.36 ｒ5 = ∞ ｄ5 = 0.8000 ｒ6 = -18.8610 ｄ6 = 0.8000 ｎd4 =1.72916 νd4 =54.68 ｒ7 = 29.7460 ｄ7 = 0.5273 ｒ8 = 25.1850 ｄ8 = 1.9000 ｎd5 =1.84666 νd5 =23.78 ｒ9 = -121.8149 ｄ9 = （可変） ｒ10= ∞（絞り） ｄ10= 0.8000 ｒ11= 11.8772（非球面） ｄ11= 1.9992 ｎd6 =1.49700 νd6 =81.54 ｒ12= -22.2117 ｄ12= 0.3000 ｒ13= 8.0295 ｄ13= 1.9997 ｎd7 =1.48749 νd7 =70.23 ｒ14= -16.2855 ｄ14= 0.7997 ｎd8 =1.64769 νd8 =33.79 ｒ15= -52.6732 ｄ15= 0.3000 ｒ16= 7.3242 ｄ16= 1.3308 ｎd9 =1.84666 νd9 =23.78 ｒ17= 4.4772 ｄ17= 1.2000 ｒ18= 17.2769 ｄ18= 1.1317 ｎd10=1.80610 νd10=40.92 ｒ19= 6.2199 ｄ19= （可変） ｒ20= 9.0812 ｄ20= 2.0000 ｎd11=1.61800 νd11=63.33 ｒ21= 19.8406 ｄ21= （可変） ｒ22= -34.2139（非球面） ｄ22= 2.0000 ｎd12=1.58313 νd12=59.38 ｒ23= -9.7728 ｄ23= 1.0032 ｒ24= ∞ ｄ25= 1.4400 ｎd13=1.54771 νd13=62.84 ｒ25= ∞ ｄ26= 0.8000 ｒ26= ∞ ｄ27= 0.8000 ｎd14=1.51633 νd14=64.14 ｒ27= ∞ ｄ28= 1.0003 ｒ28= ∞（像面） 非球面係数 第２面 Ｋ = 0 A4 =-9.3483 ×10-5 A6 = 1.4787 ×10-7 A8 =-4.5620 ×10-8 A10= 0 第１１面 Ｋ = 0 A4 =-2.6863 ×10-4 A6 =-1.0879 ×10-7 A8 = 3.8711 ×10-9 A10= 0 第２２面 Ｋ = 0 A4 =-4.8081 ×10-4 A6 = 5.9535 ×10-6 A8 =-1.6767 ×10-7 A10= 0 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 5.80000 9.17005 14.49992 ＦNO 2.6880 3.4974 4.5402 ２ω (°) 60.8 40.1 25.4 ｄ9 14.10553 7.78994 2.48873 ｄ19 1.54225 5.16705 2.56297 ｄ21 2.32790 5.01801 12.92472 。Example 7 r 1 = 21.0760 d 1 = 1.4000 n d1 = 1.74320 v d1 = 49.34 r 2 = 7.9352 (aspherical surface) d 2 = 2.8000 r 3 = ∞ d 3 = 6.5000 n d2 = 1.56883 v d2 = 56.36 r 4 = ∞ (reflection surface) d 4 = 6.0000 n d3 = 1.56883 ν d3 = 56.36 r 5 = ∞ d 5 = 0.8000 r 6 = -18.8610 d 6 = 0.8000 n d4 = 1.72916 ν d4 = 54.68 r 7 = 29.7460 d 7 = 0.5273 r 8 = 25.1850 d 8 = 1.9000 n d5 = 1.84666 ν d5 = 23.78 r 9 = -121.8149 d 9 = (variable) r 10 = ∞ (aperture) d 10 = 0.8000 r 11 = 11.8772 (aspherical surface) d 11 = 1.9992 n d6 = 1.49700 ν d6 = 81.54 r 12 = -22.2117 d 12 = 0.3000 r 13 = 8.0295 d 13 = 1.9997 n d7 = 1.48749 ν d7 = 70.23 r 14 = -16.2855 d 14 = 0.7997 n d8 = 1.64769 ν d8 = 33.79 r 15 = -52.6732 d 15 = 0.3000 r 16 = 7.3242 d 16 = 1.3308 n d9 = 1.84666 ν d9 = 23.78 r 17 = 4.4772 d 17 = 1.2000 r 18 = 17.2769 d 18 = 1.1317 n d10 = 1.80610 ν d10 = 40.92 r 19 = 6.2199 d 19 = (variable) r 20 = 9.08 12 d 20 = 2.0000 n d11 = 1.61800 ν d11 = 63.33 r 21 = 19.8406 d 21 = (variable) r 22 = -34.2139 (aspherical surface) d 22 = 2.0000 n d12 = 1.58313 ν d12 = 59.38 r 23 = -9.7728 d 23 = 1.0032 r 24 = ∞ d 25 = 1.4400 n d13 = 1.54771 ν d13 = 62.84 r 25 = ∞ d 26 = 0.8000 r 26 = ∞ d 27 = 0.8000 n d14 = 1.51633 ν d14 = 64.14 r 27 = ∞ d 28 = 1.0003 r 28 = ∞ (image plane) Aspheric coefficient second surface K = 0 A 4 = -9.3483 × 10 -5 A 6 = 1.4787 × 10 -7 A 8 = -4.5620 × 10 -8 A 10 = 0 11th Surface K = 0 A 4 = -2.6863 × 10 -4 A 6 = -1.0879 × 10 -7 A 8 = 3.8711 × 10 -9 A 10 = 0 22nd surface K = 0 A 4 = -4.8081 × 10 -4 A 6 = 5.9535 × 10 -6 A 8 = -1.6767 × 10 -7 A 10 = 0 Zoom data (∞) WE ST TE f (mm) 5.80000 9.17005 14.49992 F NO 2.6880 3.4974 4.5402 2ω (°) 60.8 40.1 25.4 d 9 14.10553 7.78994 2.48873 d 19 1.54225 5.16705 2.56297 d 21 2.32790 5.01801 12.92472.

【０１０９】 実施例８ ｒ1 = 16.1825（非球面） ｄ1 = 1.4000 ｎd1 =1.80610 νd1 =40.92 ｒ2 = 7.3872 ｄ2 = 3.5000 ｒ3 = ∞ ｄ3 = 6.5000 ｎd2 =1.60311 νd2 =60.64 ｒ4 = ∞（反射面） ｄ4 = 6.0000 ｎd3 =1.60311 νd3 =60.64 ｒ5 = ∞ ｄ5 = 0.7950 ｒ6 = -27.1461 ｄ6 = 0.8000 ｎd4 =1.72916 νd4 =54.68 ｒ7 = 20.2982 ｄ7 = 0.5273 ｒ8 = 17.2255 ｄ8 = 1.9000 ｎd5 =1.84666 νd5 =23.78 ｒ9 = 90.2451 ｄ9 = （可変） ｒ10= ∞（絞り） ｄ10= 0.8000 ｒ11= 17.0416（非球面） ｄ11= 1.9965 ｎd6 =1.56384 νd6 =60.67 ｒ12= -13.7245 ｄ12= 0.5000 ｒ13= 5.5039 ｄ13= 3.7857 ｎd7 =1.48749 νd7 =70.23 ｒ14= -38.8943 ｄ14= 0.8000 ｎd8 =1.69895 νd8 =30.13 ｒ15= 4.2611 ｄ15= （可変） ｒ16= 16.8715 ｄ16= 2.0000 ｎd9 =1.48749 νd9 =70.23 ｒ17= 96.4706 ｄ17= （可変） ｒ18= -60.1937 ｄ18= 2.0000 ｎd10=1.56384 νd10=60.67 ｒ19= -11.5463（非球面） ｄ19= 1.0039 ｒ20= ∞ ｄ20= 1.4400 ｎd11=1.54771 νd11=62.84 ｒ21= ∞ ｄ21= 0.8000 ｒ22= ∞ ｄ22= 0.8000 ｎd12=1.51633 νd12=64.14 ｒ23= ∞ ｄ23= 1.0021 ｒ24= ∞（像面） 非球面係数 第１面 Ｋ = 0 A4 = 5.1308 ×10-5 A6 = 2.3428 ×10-7 A8 =-3.7916 ×10-9 A10= 7.2819 ×10-11 第１１面 Ｋ = 0 A4 =-1.6960 ×10-4 A6 =-1.0587 ×10-6 A8 = 5.6885 ×10-8 A10=-2.0816 ×10-10 第１９面 Ｋ = 0 A4 = 2.9238 ×10-4 A6 =-1.4179 ×10-5 A8 = 6.7945 ×10-7 A10=-1.6439 ×10-8 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 5.80001 9.17026 14.49938 ＦNO 2.6926 3.5230 4.5194 ２ω (°) 61.1 40.1 25.7 ｄ9 14.09978 8.00554 2.48873 ｄ15 2.47558 7.50212 3.24411 ｄ17 3.07729 4.13993 13.92316 。Example 8 r 1 = 16.1825 (aspherical surface) d 1 = 1.4000 n d1 = 1.80610 ν d1 = 40.92 r 2 = 7.3872 d 2 = 3.5000 r 3 = ∞ d 3 = 6.5000 n d2 = 1.60311 ν d2 = 60.64 r 4 = ∞ (reflecting surface) d 4 = 6.0000 n d3 = 1.60311 ν d3 = 60.64 r 5 = ∞ d 5 = 0.7950 r 6 = -27.1461 d 6 = 0.8000 n d4 = 1.72916 ν d4 = 54.68 r 7 = 20.2982 d 7 = 0.5273 r 8 = 17.2255 d 8 = 1.9000 n d5 = 1.84666 ν d5 = 23.78 r 9 = 90.2451 d 9 = (variable) r 10 = ∞ (aperture) d 10 = 0.8000 r 11 = 17.0416 (aspherical surface) d 11 = 1.9965 n d6 = 1.56384 ν d6 = 60.67 r 12 = -13.7245 d 12 = 0.5000 r 13 = 5.5039 d 13 = 3.7857 n d7 = 1.48749 ν d7 = 70.23 r 14 = -38.8943 d 14 = 0.8000 n d8 = 1.69895 ν d8 = 30.13 r 15 = 4.2611 d 15 = (variable) r 16 = 16.8715 d 16 = 2.0000 n d9 = 1.48749 ν d9 = 70.23 r 17 = 96.4706 d 17 = (variable) r 18 = -60.1937 d 18 = 2.0000 n d10 = 1.56384 ν d10 = 60.67 r 19 = -11.5463 (aspherical surface) d 19 = 1.0039 r 20 = ∞ d 20 = 1.4400 n d11 = 1.54771 ν d11 = 62.84 r 21 = ∞ d 21 = 0.8000 r 22 = ∞ d 22 = 0.8000 n d12 = 1.51633 ν d12 = 64.14 r 23 = ∞ d 23 = 1.0021 r 24 = ∞ (image plane) Aspherical coefficient 1st surface K = 0 A 4 = 5.1308 × 10 -5 A 6 = 2.3428 × 10 -7 A 8 = -3.7916 × 10 -9 A 10 = 7.2819 × 10 -11 11th surface K = 0 A 4 = -1.6960 × 10 -4 A 6 = -1.0587 × 10 -6 A 8 = 5.6885 × 10 -8 A 10 = -2.0816 × 10 -10 19th surface K = 0 A 4 = 2.9238 × 10 -4 A 6 = -1.4179 × 10 -5 A 8 = 6.7945 × 10 -7 A 10 = -1.6439 × 10 -8 Zoom data (∞) WE ST TE f (mm) 5.80001 9.17026 14.49938 F NO 2.6926 3.5230 4.5194 2ω (°) 61.1 40.1 25.7 d 9 14.09978 8.00554 2.48873 d 15 2.47558 7.50212 3.24411 d 17 3.07729 4.13993 13.92316.

【０１１０】 実施例９ ｒ1 = 21.2658 ｄ1 = 1.0000 ｎd1 =1.74100 νd1 =52.64 ｒ2 = 8.6245 ｄ2 = 3.3711 ｒ3 = ∞ ｄ3 = 5.8400 ｎd2 =1.80400 νd2 =46.57 ｒ4 = ∞（反射面） ｄ4 = 5.4952 ｎd3 =1.80400 νd3 =46.57 ｒ5 = ∞ ｄ5 = 0.3221 ｒ6 = 300.0000 ｄ6 = 1.0000 ｎd4 =1.74320 νd4 =49.34 ｒ7 = 15.3314（非球面） ｄ7 = 0.5979 ｒ8 = 15.8974 ｄ8 = 1.4903 ｎd5 =1.84666 νd5 =23.78 ｒ9 = 43.0822 ｄ9 = （可変） ｒ10= ∞（絞り） ｄ10= 0.6000 ｒ11= 63.9771 ｄ11= 1.3913 ｎd6 =1.61800 νd6 =63.33 ｒ12= -23.2380 ｄ12= （可変） ｒ13= 7.9674（非球面） ｄ13= 2.3478 ｎd7 =1.48749 νd7 =70.23 ｒ14= -68.3182 ｄ14= 0.1000 ｒ15= 24.3652 ｄ15= 3.3012 ｎd8 =1.84666 νd8 =23.78 ｒ16= 7.7880 ｄ16= 0.2484 ｒ17= 9.2912 ｄ17= 2.1349 ｎd9 =1.72916 νd9 =54.68 ｒ18= -19.4929 ｄ18= 0.7000 ｎd10=1.53172 νd10=48.84 ｒ19= 5.2999 ｄ19= （可変） ｒ20= -22.5496（非球面） ｄ20= 2.5068 ｎd11=1.58913 νd11=61.14 ｒ21= -6.5395 ｄ21= 1.0000 ｒ22= ∞ ｄ22= 1.5000 ｎd12=1.51633 νd12=64.14 ｒ23= ∞ ｄ23= 1.4400 ｎd13=1.54771 νd13=62.84 ｒ24= ∞ ｄ24= 0.8000 ｒ25= ∞ ｄ25= 0.8000 ｎd14=1.51633 νd14=64.14 ｒ26= ∞ ｄ26= 1.0894 ｒ27= ∞（像面） 非球面係数 第７面 Ｋ = 0 A4 =-6.9423 ×10-5 A6 = 1.9216 ×10-7 A8 =-2.3395 ×10-8 A10= 0 第１３面 Ｋ = 0 A4 =-2.1881 ×10-4 A6 =-2.0288 ×10-6 A8 = 7.6472 ×10-10 A10= 0 第２０面 Ｋ = 0 A4 =-1.0095 ×10-3 A6 = 3.4022 ×10-8 A8 =-1.7165 ×10-7 A10= 0 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 5.52179 7.96811 15.98093 ＦNO 2.4770 2.9873 4.5000 ２ω (°) 64.5 44.7 22.7 ｄ9 17.73448 10.81643 2.00000 ｄ12 1.20000 3.80000 3.50000 ｄ19 2.60300 5.58623 15.86209 。Example 9 r 1 = 21.2658 d 1 = 1.0000 n d1 = 1.74100 ν d1 = 52.64 r 2 = 8.6245 d 2 = 3.3711 r 3 = ∞ d 3 = 5.8400 n d2 = 1.80400 ν d2 = 46.57 r 4 = ∞ (Reflecting surface) d 4 = 5.4952 n d3 = 1.80400 ν d3 = 46.57 r 5 = ∞ d 5 = 0.3221 r 6 = 300.0000 d 6 = 1.0000 nd 4 = 1.74320 ν d4 = 49.34 r 7 = 15.3314 (aspherical surface) d 7 = 0.5979 r 8 = 15.8974 d 8 = 1.4903 n d5 = 1.84666 ν d5 = 23.78 r 9 = 43.0822 d 9 = (variable) r 10 = ∞ (aperture) d 10 = 0.6000 r 11 = 63.9771 d 11 = 1.3913 n d6 = 1.61800 ν d6 = 63.33 r 12 = -23.2380 d 12 = (variable) r 13 = 7.9674 (aspherical surface) d 13 = 2.3478 n d7 = 1.48749 ν d7 = 70.23 r 14 = -68.3182 d 14 = 0.1000 r 15 = 24.3652 d 15 = 3.3012 n d8 = 1.84666 ν d8 = 23.78 r 16 = 7.7880 d 16 = 0.2484 r 17 = 9.2912 d 17 = 2.1349 n d9 = 1.72916 ν d9 = 54.68 r 18 = -19.4929 d 18 = 0.7000 n d10 = 1.53172 ν d10 = 48.84 r 19 = 5.2999 d 19 = (variable) r 20 = -22.5496 (aspherical surface) d 20 = 2.5068 n d11 = 1.58913 ν d11 = 61.14 r 21 = -6.5395 d 21 = 1.0000 r 22 = ∞ d 22 = 1.5000 n d12 = 1.51633 ν d12 = 64.14 r 23 = ∞ d 23 = 1.4400 n d13 = 1.54771 ν d13 = 62.84 r 24 = ∞ d 24 = 0.8000 r 25 = ∞ d 25 = 0.8000 n d14 = 1.51633 ν d14 = 64.14 r 26 = ∞ d 26 = 1.0894 r 27 = ∞ (image plane) Non Spherical coefficient 7th surface K = 0 A 4 = -6.9423 × 10 -5 A 6 = 1.9216 × 10 -7 A 8 = -2.3395 × 10 -8 A 10 = 0 13th surface K = 0 A 4 = -2.1881 × 10 -4 A 6 = -2.0288 × 10 -6 A 8 = 7.6472 × 10 -10 A 10 = 0 20th surface K = 0 A 4 = -1.0095 × 10 -3 A 6 = 3.4022 × 10 -8 A 8 = -1.7165 × 10 -7 A 10 = 0 Zoom data (∞) WE ST TE f (mm) 5.52179 7.96811 15.98093 F NO 2.4770 2.9873 4.5000 2ω (°) 64.5 44.7 22.7 d 9 17.73448 10.81643 2.00000 d 12 1.20000 3.80000 3.50000 d 19 2.60300 5.58623 15.86209.

【０１１１】 実施例１０ ｒ1 = 24.8917 ｄ1 = 1.0000 ｎd1 =1.74100 νd1 =52.64 ｒ2 = 8.0792 ｄ2 = 2.3760 ｒ3 = ∞ ｄ3 = 5.2400 ｎd2 =1.80400 νd2 =46.57 ｒ4 = ∞（反射面） ｄ4 = 5.0006 ｎd3 =1.80400 νd3 =46.57 ｒ5 = ∞ ｄ5 = 0.2922 ｒ6 = 300.0000 ｄ6 = 1.0000 ｎd4 =1.74320 νd4 =49.34 ｒ7 = 14.5213（非球面） ｄ7 = 0.1000 ｒ8 = 14.5896 ｄ8 = 1.7517 ｎd5 =1.84666 νd5 =23.78 ｒ9 = 64.9869 ｄ9 = （可変） ｒ10= ∞（絞り） ｄ10= 0.6000 ｒ11= 33.4595 ｄ11= 1.8985 ｎd6 =1.61800 νd6 =63.33 ｒ12= -11.1499 ｄ12= 0.7000 ｎd7 =1.80518 νd7 =25.42 ｒ13= -20.0542 ｄ13= （可変） ｒ14= 10.2987（非球面） ｄ14= 2.0299 ｎd8 =1.48749 νd8 =70.23 ｒ15= 18890.0000 ｄ15= 0.1000 ｒ16= 19.8062 ｄ16= 4.5045 ｎd9 =1.84666 νd9 =23.78 ｒ17= 9.7836 ｄ17= 0.2000 ｒ18= 11.2175 ｄ18= 1.7598 ｎd10=1.72916 νd10=54.68 ｒ19= -51.5183 ｄ19= 0.7000 ｎd11=1.53172 νd11=48.84 ｒ20= 5.5430 ｄ20= （可変） ｒ21= -23.0137（非球面） ｄ21= 1.9685 ｎd12=1.58913 νd12=61.14 ｒ22= -7.0933 ｄ22= 1.0000 ｒ23= ∞ ｄ23= 1.5000 ｎd13=1.51633 νd13=64.14 ｒ24= ∞ ｄ24= 1.4400 ｎd14=1.54771 νd14=62.84 ｒ25= ∞ ｄ15= 0.8000 ｒ26= ∞ ｄ16= 0.8000 ｎd15=1.51633 νd15=64.14 ｒ27= ∞ ｄ17= 1.0106 ｒ28= ∞（像面） 非球面係数 第７面 Ｋ = 0 A4 =-8.0580 ×10-5 A6 = 7.6927 ×10-7 A8 =-2.7173 ×10-8 A10= 0 第１４面 Ｋ = 0 A4 =-1.1033 ×10-4 A6 =-1.4285 ×10-8 A8 =-1.8629 ×10-8 A10= 0 第２１面 Ｋ = 0 A4 =-8.5891 ×10-4 A6 = 1.0215 ×10-5 A8 =-3.2143 ×10-7 A10= 0 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 5.86879 9.99877 17.39648 ＦNO 2.4340 3.2140 4.5000 ２ω (°) 61.4 35.8 21.0 ｄ9 17.88781 8.41716 2.00000 ｄ13 1.20000 6.81663 3.50000 ｄ20 3.14136 7.01231 16.74709 。Example 10 r 1 = 24.8917 d 1 = 1.0000 n d1 = 1.74100 ν d1 = 52.64 r 2 = 8.0792 d 2 = 2.3760 r 3 = ∞ d 3 = 5.2400 n d2 = 1.80400 ν d2 = 46.57 r 4 = ∞ (Reflecting surface) d 4 = 5.0006 n d3 = 1.80400 ν d3 = 46.57 r 5 = ∞ d 5 = 0.2922 r 6 = 300.0000 d 6 = 1.0000 nd 4 = 1.74320 ν d4 = 49.34 r 7 = 14.5213 (aspheric surface) d 7 = 0.1000 r 8 = 14.5896 d 8 = 1.7517 nd d = 1.84666 ν d5 = 23.78 r 9 = 64.9869 d 9 = (variable) r 10 = ∞ (aperture) d 10 = 0.6000 r 11 = 33.4595 d 11 = 1.8985 nd 6 = 1.61800 ν d6 = 63.33 r 12 = -11.1499 d 12 = 0.7000 n d7 = 1.80518 ν d7 = 25.42 r 13 = -20.0542 d 13 = (variable) r 14 = 10.2987 (aspheric surface) d 14 = 2.0299 n d8 = 1.48749 ν d8 = 70.23 r 15 = 18890.0000 d 15 = 0.1000 r 16 = 19.8062 d 16 = 4.5045 n d9 = 1.84666 ν d9 = 23.78 r 17 = 9.7836 d 17 = 0.2000 r 18 = 11.2175 d 18 = 1.7598 n d10 = 1.72916 ν d10 = 54.68 r 19 = -51.5183 d 19 = 0.7000 n d1 1 = 1.53172 ν d11 = 48.84 r 20 = 5.5430 d 20 = (variable) r 21 = -23.0137 (aspherical surface) d 21 = 1.9685 n d12 = 1.58913 ν d12 = 61.14 r 22 = -7.0933 d 22 = 1.0000 r 23 = ∞ d 23 = 1.5000 n d13 = 1.51633 ν d13 = 64.14 r 24 = ∞ d 24 = 1.4400 n d14 = 1.54771 ν d14 = 62.84 r 25 = ∞ d 15 = 0.8000 r 26 = ∞ d 16 = 0.8000 n d15 = 1.51633 ν d15 = 64.14 r 27 = ∞ d 17 = 1.0106 r 28 = ∞ (image plane) Aspheric coefficient 7th surface K = 0 A 4 = -8.0580 × 10 -5 A 6 = 7.6927 × 10 -7 A 8 = -2.7173 × 10 -8 A 10 = 0 14th surface K = 0 A 4 = -1.1033 × 10 -4 A 6 = -1.4285 × 10 -8 A 8 = -1.8629 × 10 -8 A 10 = 0 21st surface K = 0 A 4 = -8.5891 × 10 -4 A 6 = 1.0215 × 10 -5 A 8 = -3.2143 × 10 -7 A 10 = 0 Zoom data (∞) WE ST TE f (mm) 5.86879 9.99877 17.39648 F NO 2.4340 3.2140 4.5000 2ω (°) 61.4 35.8 21.0 d 9 17.88781 8.41716 2.00000 d 13 1.20000 6.81663 3.50000 d 20 3.14136 7.01231 16.74709.

【０１１２】 実施例１１ ｒ1 = 41.9739 ｄ1 = 1.2000 ｎd1 =1.77250 νd1 =49.60 ｒ2 = 11.1642 ｄ2 = 2.9000 ｒ3 = ∞ ｄ3 = 6.5000 ｎd2 =1.78590 νd2 =44.20 ｒ4 = ∞（反射面） ｄ4 = 6.0000 ｎd3 =1.78590 νd3 =44.20 ｒ5 = ∞ ｄ5 = 0.3971 ｒ6 = 28.0000 ｄ6 = 1.2000 ｎd4 =1.74330 νd4 =49.33 ｒ7 = 11.3578（非球面） ｄ7 = 0.3457 ｒ8 = 9.4845 ｄ8 = 1.7925 ｎd5 =1.84666 νd5 =23.78 ｒ9 = 14.2959 ｄ9 = （可変） ｒ10= ∞（絞り） ｄ10= 1.0000 ｒ11= 47.8757 ｄ11= 1.9600 ｎd6 =1.72916 νd6 =54.68 ｒ12= -9.0806 ｄ12= 0.7000 ｎd7 =1.72825 νd7 =28.46 ｒ13= -25.4395 ｄ13= （可変） ｒ14= 9.1761（非球面） ｄ14= 1.9500 ｎd8 =1.74330 νd8 =49.33 ｒ15= 75.3616 ｄ15= 0.8461 ｒ16= 24.3002 ｄ16= 3.8969 ｎd9 =1.74330 νd9 =49.33 ｒ17= ∞ ｄ17= 1.0000 ｎd10=1.72825 νd10=28.46 ｒ18= 4.8249 ｄ18= （可変） ｒ19= 49.5382 ｄ19= 2.7500 ｎd11=1.69350 νd11=53.20 ｒ20= -10.0407（非球面） ｄ20= 0.8269 ｒ21= ∞ ｄ21= 1.4400 ｎd12=1.54771 νd12=62.84 ｒ22= ∞ ｄ22= 0.8000 ｒ23= ∞ ｄ23= 0.8000 ｎd13=1.51633 νd13=64.14 ｒ24= ∞ ｄ24= 1.0447 ｒ25= ∞（像面） 非球面係数 第７面 Ｋ = 0 A4 = 2.2504 ×10-5 A6 = 2.6875 ×10-6 A8 =-1.2962 ×10-7 A10= 2.8718 ×10-9 第１４面 Ｋ = 0 A4 =-9.8664 ×10-5 A6 = 4.0400 ×10-6 A8 =-4.4986 ×10-7 A10= 1.3851 ×10-8 第２０面 Ｋ = 0 A4 = 5.3089 ×10-4 A6 =-1.6198 ×10-5 A8 = 4.4581 ×10-7 A10=-4.9080 ×10-9 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 6.02622 9.31725 14.28897 ＦNO 2.7652 3.4888 4.5271 ２ω (°) 62.4 42.8 28.7 ｄ9 14.24100 6.97804 2.00694 ｄ13 2.10000 6.51339 5.34809 ｄ18 2.46549 5.31403 11.45279 。Example 11 r 1 = 41.9739 d 1 = 1.2000 n d1 = 1.77250 ν d1 = 49.60 r 2 = 11.1642 d 2 = 2.9000 r 3 = ∞ d 3 = 6.5000 n d2 = 1.78590 ν d2 = 44.20 r 4 = ∞ (Reflecting surface) d 4 = 6.0000 n d3 = 1.78590 ν d3 = 44.20 r 5 = ∞ d 5 = 0.3971 r 6 = 28.0000 d 6 = 1.2000 n d4 = 1.74330 ν d4 = 49.33 r 7 = 11.3578 (aspheric surface) d 7 = 0.3457 r 8 = 9.4845 d 8 = 1.7925 n d5 = 1.84666 ν d5 = 23.78 r 9 = 14.2959 d 9 = (variable) r 10 = ∞ (aperture) d 10 = 1.0000 r 11 = 47.8757 d 11 = 1.9600 n d6 = 1.72916 ν d6 = 54.68 r 12 = -9.0806 d 12 = 0.7000 n d7 = 1.72825 ν d7 = 28.46 r 13 = -25.4395 d 13 = (variable) r 14 = 9.1761 (aspherical surface) d 14 = 1.9500 n d8 = 1.74330 ν d8 = 49.33 r 15 = 75.3616 d 15 = 0.8461 r 16 = 24.3002 d 16 = 3.8969 n d9 = 1.74330 ν d9 = 49.33 r 17 = ∞ d 17 = 1.0000 n d10 = 1.72825 ν d10 = 28.46 r 18 = 4.8249 d 18 = (Variable) r 19 = 49.5382 d 19 = 2.7500 n d11 = 1. 69350 ν d11 = 53.20 r 20 = -10.0407 (aspherical surface) d 20 = 0.8269 r 21 = ∞ d 21 = 1.4400 n d12 = 1.54771 ν d12 = 62.84 r 22 = ∞ d 22 = 0.8000 r 23 = ∞ d 23 = 0.8000 n d13 = 1.51633 ν d13 = 64.14 r 24 = ∞ d 24 = 1.0447 r 25 = ∞ (image plane) Aspheric coefficient 7th surface K = 0 A 4 = 2.2504 × 10 -5 A 6 = 2.6875 × 10 -6 A 8 = -1.2962 × 10 -7 A 10 = 2.8718 × 10 -9 14th surface K = 0 A 4 = -9.8664 × 10 -5 A 6 = 4.0400 × 10 -6 A 8 = -4.4986 × 10 -7 A 10 = 1.3851 × 10 -8 20th surface K = 0 A 4 = 5.3089 × 10 -4 A 6 = -1.6198 × 10 -5 A 8 = 4.4581 × 10 -7 A 10 = -4.9080 × 10 -9 Zoom data (∞ ) WE ST TE f (mm) 6.02622 9.31725 14.28897 F NO 2.7652 3.4888 4.5271 2ω (°) 62.4 42.8 28.7 d 9 14.24100 6.97804 2.00694 d 13 2.10000 6.51339 5.34809 d 18 2.46549 5.31403 11.45279.

【０１１３】 実施例１２ ｒ1 = -14.2761（非球面） ｄ1 = 5.1000 ｎd1 =1.50913 νd1 =56.20 ｒ2 = ∞（反射面） ｄ2 = 5.7941 ｎd2 =1.50913 νd2 =56.20 ｒ3 = ∞ ｄ3 = 2.1000 ｒ4 = -6.4892 ｄ4 = 0.8000 ｎd3 =1.64000 νd3 =60.07 ｒ5 = -84.1654 ｄ5 = 1.1935 ｎd4 =1.84666 νd4 =23.78 ｒ6 = -16.8306 ｄ6 = （可変） ｒ7 = ∞（絞り） ｄ7 = 0.4000 ｒ8 = 34.9225（非球面） ｄ8 = 1.4006 ｎd5 =1.74330 νd5 =49.33 ｒ9 = -15.2934 ｄ9 = 0.1500 ｒ10= 6.1210 ｄ10= 3.3481 ｎd6 =1.61800 νd6 =63.33 ｒ11= 27.4556 ｄ11= 0.8000 ｎd7 =1.84666 νd7 =23.78 ｒ12= 4.9467 ｄ12= （可変） ｒ13= 13.6380 ｄ13= 1.4415 ｎd8 =1.51633 νd8 =64.14 ｒ14= -143.7586 ｄ14= （可変） ｒ15= -19.5436 ｄ15= 1.3641 ｎd9 =1.58913 νd9 =61.25 ｒ16= -7.1346（非球面） ｄ16= 0.8000 ｒ17= ∞ ｄ17= 1.0500 ｎd10=1.54771 νd10=62.84 ｒ18= ∞ ｄ18= 0.8000 ｒ19= ∞ ｄ19= 0.8000 ｎd11=1.51633 νd11=64.14 ｒ20= ∞ ｄ20= 0.9669 ｒ21= ∞（像面） 非球面係数 第１面 Ｋ = 0 A4 = 3.2165 ×10-4 A6 =-9.1756 ×10-7 A8 = 4.1788 ×10-9 A10= 0.0000 第８面 Ｋ = 0 A4 =-1.2083 ×10-4 A6 = 1.1516 ×10-7 A8 =-2.9381 ×10-8 A10= 0.0000 第１６面 Ｋ = 0 A4 = 1.3137 ×10-3 A6 =-2.0878 ×10-5 A8 = 4.9397 ×10-7 A10= 0.0000 ズームデータ（∞） ＷＥ ＳＴ ＴＥ ｆ (mm) 5.02898 8.69474 14.52092 ＦNO 2.6544 3.5217 4.5079 ２ω (°) 64.8 38.2 22.6 ｄ6 14.61860 7.39251 1.80000 ｄ12 3.75585 8.20107 4.39975 ｄ14 3.16733 5.96897 15.38987 。Example 12 r 1 = -14.2761 (aspherical surface) d 1 = 5.1000 n d1 = 1.50913 ν d1 = 56.20 r 2 = ∞ (reflection surface) d 2 = 5.9941 n d2 = 1.50913 ν d2 = 56.20 r 3 = ∞ d 3 = 2.1000 r 4 = -6.4892 d 4 = 0.8000 n d3 = 1.64000 ν d3 = 60.07 r 5 = -84.1654 d 5 = 1.1935 n d4 = 1.84666 ν d4 = 23.78 r 6 = -16.8306 d 6 = (variable) r 7 = ∞ (aperture) d 7 = 0.4000 r 8 = 34.9225 (aspherical surface) d 8 = 1.4006 n d5 = 1.74330 ν d5 = 49.33 r 9 = -15.2934 d 9 = 0.1500 r 10 = 6.1210 d 10 = 3.3481 nd 6 = 1.61800 ν d6 = 63.33 r 11 = 27.4556 d 11 = 0.8000 n d7 = 1.84666 ν d7 = 23.78 r 12 = 4.9467 d 12 = (variable) r 13 = 13.6380 d 13 = 1.4415 n d8 = 1.51633 ν d8 = 64.14 r 14 = -143.7586 d 14 = (variable) r 15 = -19.5436 d 15 = 1.3641 n d9 = 1.58913 ν d9 = 61.25 r 16 = -7.1346 (aspherical surface) d 16 = 0.8000 r 17 = ∞ d 17 = 1.0500 n d10 = 1.54771 ν d10 = 62.84 r 18 = ∞ d 18 = 0.8000 r 19 = ∞ d 19 = 0.8000 n d11 = 1.51633 ν d11 = 64.14 r 20 = ∞ d 20 = 0.9669 r 21 = ∞ ( image plane) aspheric coefficients first surface K = 0 A 4 = 3.2165 × 10 -4 A 6 = -9.1756 × 10 - 7 A 8 = 4.1788 × 10 -9 A 10 = 0.0000 8th surface K = 0 A 4 = -1.2083 × 10 -4 A 6 = 1.1516 × 10 -7 A 8 = -2.9381 × 10 -8 A 10 = 0.0000 16 surfaces K = 0 A 4 = 1.3137 × 10 -3 A 6 = -2.0878 × 10 -5 A 8 = 4.9397 × 10 -7 A 10 = 0.0000 Zoom data (∞) WE ST TE f (mm) 5.02898 8.69474 14.52092 F NO 2.6544 3.5217 4.5079 2ω (°) 64.8 38.2 22.6 d 6 14.61860 7.39251 1.80000 d 12 3.75585 8.20107 4.39975 d 14 3.16733 5.96897 15.38987.

【０１１４】以上の実施例１、１２の無限遠物点合焦時
の収差図をそれぞれ図１３、図１４に示す。これらの収
差図において、（ａ）は広角端、（ｂ）は中間状態、
（ｃ）は望遠端における球面収差ＳＡ、非点収差ＡＳ、
歪曲収差ＤＴ、倍率色収差ＣＣを示す。Aberration diagrams of Examples 1 and 12 when focusing on an object point at infinity are shown in FIGS. 13 and 14, respectively. In these aberration diagrams, (a) is the wide-angle end, (b) is the intermediate state,
(C) shows spherical aberration SA, astigmatism AS at the telephoto end,
The distortion DT and the chromatic aberration of magnification CC are shown.

【０１１５】次に、上記各実施例における条件（ａ）〜
（ｆ）に係わるＬ、ｄ／Ｌ、ＤFT／ｆT Ｍ3 ／Ｍ2 ｆ
11／ｆ12 βRt、ａ、ｔLPF の値を示す。Next, the conditions (a) to
L, d / L, D FT / f T M 3 / M 2 f related to (f)
The values of 11 / f 12 β Rt , a, and t LPF are shown.

【０１１６】 実施例 Ｌ ｄ／Ｌ ＤFT／ｆT Ｍ3 ／Ｍ2 ｆ11／ｆ12 １ 5.6 0.72088 0.78471 1.19347 -0.12343 ２ 6.0 0.79009 0.76004 0.53348 -0.32094 ３ 5.6 0.71748 0.11496 0.93206 0.36284 ４ 6.0 0.69413 0.15191 0.92989 0.20195 ５ 6.64 0.76797 0.25931 第３群は負 0 ６ 6.64 0.74877 0.27393 第３群は負 0 ７ 6.64 1.19996 0.17676 0.91213 0.37232 ８ 6.64 1.17430 0.22374 0.93381 0.39484 ９ 6.64 0.94629 0.21901 0.85382 0.22917 １０ 6.64 0.85491 0.20119 0.85523 0.05553 １１ 6.64 0.94867 0.37452 0.73366 0.09671 １２ 6.0 1.20313 0.30301 0.95350 1.26698 。Example L d / L D FT / f T M 3 / M 2 f 11 / f 12 1 5.6 0.72088 0.78471 1.19347 -0.12343 2 6.0 0.79009 0.76004 0.53348 -0.32094 3 5.6 0.71748 0.11496 0.93206 0.36284 4 6.0 0.69413 0.15191 0.92989 0.20 5 6.64 0.76797 0.25931 Negative for 3rd group 0 6 6.64 0.74877 0.27393 Negative for 3rd group 0 7 6.64 1.19996 0.17676 0.91213 0.37232 8 6.64 1.17430 0.22374 0.93381 0.39484 9 6.64 0.94629 0.21901 0.85382 0.22917 483 12 6.0 1.20313 0.30301 0.95350 1.26698.

【０１１７】 実施例 βRt ａ ｔLPF １ -1.6884 3.0 1.80 ２ -1.19598 3.0 1.80 ３ -1.49396 3.0 1.80 ４ -1.26884 3.0 0.80 ５ -1.51672 3.0 1.55 ６ -1.38530 3.0 1.44 ７ -1.26560 3.0 1.44 ８ -1.30121 3.0 1.44 ９ -1.05735 3.0 1.44 １０ -1.14882 3.0 1.44 １１ -0.86588 3.0 1.44 １１ -1.36309 2.5 1.20 。Example β Rt a t LPF 1 -1.6884 3.0 1.80 2 -1.19598 3.0 1.80 3 -1.49396 3.0 1.80 4 -1.26884 3.0 0.80 5 -1.51672 3.0 1.55 6 -1.38530 3.0 1.44 7 -1.26560 3.0 1.44 8 -1.30121 3.0 1.44 9 -1.05735 3.0 1.44 10 -1.14882 3.0 1.44 11 -0.86588 3.0 1.44 11 -1.36309 2.5 1.20.

【０１１８】次に、本発明の光路折り曲げズーム光学系
の沈胴方式の例について説明する。図１５は、具体的に
図９の光路折り曲げズーム光学系（実施例９）に適用し
た例であり、図１５（ｂ）は実施例９の光路折り曲げズ
ーム光学系が広角端にある状態（図９（ｃ））の光路折
り曲げ光軸を含む断面図であり、この状態において、第
１−２群Ｇ１−２と第２群Ｇ２の間の空間に、第２群Ｇ
２の２枚のレンズと第１−１群Ｇ１−１の光路折り曲げ
プリズムＰを退避させ、空いた空間に第１−１群Ｇ１−
１の光路折り曲げプリズムＰより前の負メニスカスレン
ズＬ１を沈胴させて、この光路折り曲げズーム光学系に
入射する光軸方向（カメラの奥行き方向）の厚さを薄く
している。なお、第２群Ｇ２より像面Ｉ側に空間がある
場合には、光路折り曲げプリズムＰと第１−２群Ｇ１−
２だけでなく、第２群Ｇ２等を含めて像面Ｉ側に退避さ
せるようにしてもよい。Next, an example of the collapsing method of the optical path bending zoom optical system of the present invention will be described. FIG. 15 is an example applied specifically to the optical path bending zoom optical system (Example 9) of FIG. 9, and FIG. 15B is a state in which the optical path bending zoom optical system of Example 9 is at the wide-angle end (FIG. 9 (c)) is a cross-sectional view including the optical path bending optical axis, and in this state, a second group G is provided in a space between the first-second group G1-2 and the second group G2.
2 of the two lenses and the optical path bending prism P of the 1-1st group G1-1 are retracted, and the 1-1st group G1-
The negative meniscus lens L1 in front of the first optical path bending prism P is collapsed to reduce the thickness in the optical axis direction (depth direction of the camera) incident on the optical path bending zoom optical system. When there is a space on the image plane I side of the second group G2, the optical path bending prism P and the first-second group G1-
Not only the second group G2 but also the second group G2 and the like may be retracted to the image plane I side.

【０１１９】図１６は、光路折り曲げ用の反射光学素子
をミラーＭで構成した場合の１つの沈胴方式の概念図で
あり、ミラーＭを破線の位置に倒し、かつ、そのミラー
Ｍよりも像面Ｉ側のレンズＬ２、Ｌ３も破線の位置に倒
して、この光路折り曲げズーム光学系に入射する光軸方
向（カメラの奥行き方向）の厚さを薄くするようにして
いる。FIG. 16 is a conceptual diagram of one collapsing method in which the reflecting optical element for bending the optical path is composed of the mirror M. The mirror M is tilted to the position of the broken line, and the image plane is larger than that of the mirror M. The lenses L2 and L3 on the I side are also tilted to the position of the broken line to reduce the thickness in the optical axis direction (camera depth direction) incident on the optical path bending zoom optical system.

【０１２０】図１７は、光路折り曲げ用の反射光学素子
をミラーＭで構成した場合の別の沈胴方式の概念図であ
り、ミラーＭを破線の位置に倒し、空いた空間にそのミ
ラーＭよりも物体側のレンズ群ＬＧを沈胴させて、同様
に厚さを薄くしている。なお、ミラーＭを倒すのではな
く、図１５のように、折り曲げ後の光軸に沿って退避さ
せるようにしてもよい。FIG. 17 is a conceptual diagram of another collapsing method in the case where the reflecting optical element for bending the optical path is composed of the mirror M. The mirror M is tilted to the position of the broken line and the mirror M is placed in an empty space. Similarly, the lens group LG on the object side is collapsed to reduce the thickness. Instead of tilting the mirror M, the mirror M may be retracted along the bent optical axis as shown in FIG.

【０１２１】図１８は、光路折り曲げ用の反射光学素子
を液体プリズムあるいは変形可能なプリズムＬＰで構成
し（図１８（ａ））、収納時に液体を抜く等して図１８
（ｂ）のようにつぶして薄くすることもでき、その空い
た空間にプリズムＬＰよりも物体側のレンズ群を沈胴さ
せるなり（図１７）、他のレンズを倒すなり（図１６）
して同様に厚さを薄くすることもできる。In FIG. 18, the reflective optical element for bending the optical path is constituted by a liquid prism or a deformable prism LP (FIG. 18 (a)), and the liquid is drained at the time of storage and the like.
It can be thinned by crushing as in (b), and the lens group closer to the object side than the prism LP is collapsed in the vacant space (FIG. 17) and other lenses are tilted (FIG. 16).
Similarly, the thickness can be reduced.

【０１２２】また、本発明の光路折り曲げズーム光学系
において、光路折り曲げ用の反射光学素子を形状可変ミ
ラーで構成することもできる。形状可変ミラーは、変形
可能なフィルムに反射ミラーコーティングを施した反射
ミラーであり、折り畳みあるいは巻き取りによって退避
させることが可能である。Further, in the optical path bending zoom optical system of the present invention, the reflective optical element for bending the optical path may be composed of a variable shape mirror. The variable shape mirror is a reflective mirror in which a deformable film is coated with a reflective mirror, and can be retracted by folding or winding.

【０１２３】また、光路折り曲げ用の反射光学素子を形
状可変ミラーで構成する場合に、形状可変ミラーを変形
させて合焦させるようにすることも可能である。図１９
にその概念図を示す。近距離の物体に対しての合焦は、
無限遠合焦時に平面の形状可変ミラーＤＭの反射面を図
示の矢印で示したように凹面に変えることにより、形状
可変ミラーＤＭの面形状のみの変更で行っている。近距
離合焦の際に、形状可変ミラーＤＭの面形状を反射面の
有効面内で非球面形状とする。特に、反射面にパワーを
持たせた場合、回転対称な反射面形状であると、その反
射面に偏心して入射することによる偏心収差が発生す
る。そのため、形状可変ミラーＤＭの面形状を回転非対
称な曲面とすることが望ましい。Further, when the reflective optical element for bending the optical path is composed of a variable shape mirror, it is possible to deform the variable shape mirror to focus. FIG. 19
Shows the conceptual diagram. Focusing on an object at a short distance is
By changing the reflecting surface of the planar variable shape mirror DM to a concave surface as indicated by an arrow when focusing on infinity, only the surface shape of the variable shape mirror DM is changed. When focusing on a short distance, the surface shape of the variable shape mirror DM is made an aspherical shape within the effective surface of the reflecting surface. In particular, when the reflecting surface is provided with power and has a rotationally symmetrical reflecting surface shape, decentering aberration occurs due to decentering and entering the reflecting surface. Therefore, it is desirable that the surface shape of the variable shape mirror DM is a rotationally asymmetric curved surface.

【０１２４】また、偏心により軸外において回転非対称
な歪曲収差等が発生する。偏心により発生する面対称な
偏心収差を補正するために、形状可変ミラーＤＭの面形
状を、図２０に示すように、形状可変ミラーＤＭの反射
面に入射し反射する光軸を含む平面を唯一の対称面とし
た面対称な曲面に変形することが望ましい。Further, due to the eccentricity, rotationally asymmetric distortion aberration and the like occur off-axis. In order to correct the plane-symmetrical eccentric aberration generated by the eccentricity, the surface shape of the variable shape mirror DM is, as shown in FIG. It is desirable to transform the surface into a plane-symmetric curved surface.

【０１２５】図１９の構成の場合、形状可変ミラーＤＭ
は無限遠合焦時に平面であるが、近距離物点への合焦時
には、図２０に示すように、対称面を１面のみとする回
転非対称非球面に変形することで、近距離合焦時におけ
る偏心収差を補正することができる。このような構成に
より、電子撮像装置全体の小型化と性能の維持が達成さ
れる。In the case of the configuration of FIG. 19, the variable shape mirror DM
Is a plane at the time of focusing at infinity, but at the time of focusing at an object point at a short distance, as shown in FIG. It is possible to correct decentration aberrations at the time. With such a configuration, downsizing and maintenance of performance of the entire electronic image pickup device can be achieved.

【０１２６】図２１は、形状可変ミラーＤＭの反射面を
矢印方向にチルトすることにより手ブレ補正を行った例
である。図１９の状態では手ブレを起こしていない場合
であり、図２１は形状可変ミラーＤＭの反射面をチルト
する手ブレ補正機能が働いた状態である。撮影方向に対
して撮像装置が図２１のように下を向いた際には、図に
示すように、形状可変ミラーＤＭの反射面の傾きを破線
から実線位置へ変えることで、入射光軸が傾かないよう
になっている。その際に収差の変動を抑えるように、形
状可変ミラーＤＭの面形状全体も変更することが望まし
い。FIG. 21 shows an example in which camera shake correction is performed by tilting the reflecting surface of the deformable mirror DM in the direction of the arrow. In the state of FIG. 19, there is no camera shake, and in FIG. 21, the camera shake correction function of tilting the reflecting surface of the deformable mirror DM is activated. When the image pickup device faces downward in the shooting direction as shown in FIG. 21, the incident optical axis is changed by changing the inclination of the reflecting surface of the deformable mirror DM from the broken line to the solid line position as shown in the figure. It doesn't lean. At this time, it is desirable to change the entire surface shape of the variable shape mirror DM so as to suppress the fluctuation of aberration.

【０１２７】なお、本発明の光路折り曲げ用の反射光学
素子の反射面にパワーを持たせ、その面形状を自由曲面
等で構成してもよい。あるいは、反射光学素子の反射面
をホログフィック光学素子（ＨＯＥ）で構成してもよ
い。The reflecting surface of the reflecting optical element for bending the optical path of the present invention may be provided with power, and its surface shape may be constituted by a free curved surface or the like. Alternatively, the reflective surface of the reflective optical element may be composed of a holographic optical element (HOE).

【０１２８】また、その反射光学素子を実施例１〜１２
のように光路折り曲げプリズムＰで構成する場合に、そ
の光路折り曲げプリズムＰの前後に配置されるレンズと
プリズムＰを接合するように構成してもよい。In addition, the reflective optical element is used in Examples 1 to 12.
When the optical path bending prism P is used as described above, the lenses arranged before and after the optical path bending prism P may be bonded to the prism P.

【０１２９】ところで、本発明の光路折り曲げズーム光
学系を用いてデジタルカメラのような電子撮像装置を構
成する場合に、光路折り曲げズーム光学系とＣＣＤのよ
うな電子撮像素子との間に、光路分割素子を配置して撮
影光路をファインダー光路に分割するようにしてもよ
い。その例を図２２に示す。図２２は、デジタルカメラ
４０の正面図であり、この場合の光路折り曲げズーム光
学系は９０°光路を折り曲げる反射光学素子Ｍ１とその
像面側に配置されているレンズ群ＬＡとからなり、像面
に撮像素子のＣＣＤ４９が配置されている。そして、レ
ンズ群ＬＡとＣＣＤ４９の間にハーフミラーのような光
路分割素子Ｍ２が配置されており、反射光学素子Ｍ１で
の反射前後の光軸を含む平面に対し略垂直の側（図では
上側）に光路が分割される。もちろん、光路分割素子Ｍ
２はファインダー光路に光束を導くときのみ挿入される
反射面であってもよい。光路分割素子Ｍ２で反射された
光路は、別の反射面Ｍ３により、光路分割素子Ｍ２での
反射前後の光軸を含む平面内で９０°折り曲げられ、さ
らに第４の反射面Ｍ４により９０°折り曲げられ、光軸
が反射光学素子Ｍ１に入射する光軸と略平行に射出する
ようになっている。図２２では、接眼光学系は図示され
ていないが、第４の反射面Ｍ４の射出側あるいはその反
射面Ｍ４を含んだ前後に接眼光学系が配置され、第４の
反射面Ｍ４の射出側に位置する観察者の眼球によって被
写体の観察像が観察される。By the way, when an electronic image pickup device such as a digital camera is constructed using the optical path bending zoom optical system of the present invention, an optical path division is performed between the optical path bending zoom optical system and an electronic image pickup device such as a CCD. Elements may be arranged to divide the photographing optical path into the finder optical path. An example thereof is shown in FIG. FIG. 22 is a front view of the digital camera 40. In this case, the optical path bending zoom optical system is composed of a reflective optical element M1 that bends the optical path by 90 ° and a lens group LA arranged on the image surface side thereof. The CCD 49 of the image pickup device is arranged at. An optical path splitting element M2 such as a half mirror is arranged between the lens group LA and the CCD 49, and a side (upper side in the figure) substantially perpendicular to a plane including the optical axis before and after reflection by the reflective optical element M1. The optical path is split into. Of course, the optical path splitting element M
Reference numeral 2 may be a reflecting surface that is inserted only when guiding the light beam to the finder optical path. The optical path reflected by the optical path splitting element M2 is bent by 90 ° in a plane including the optical axis before and after reflection by the optical path splitting element M2 by another reflecting surface M3, and further bent by 90 ° by the fourth reflecting surface M4. The optical axis is emitted substantially parallel to the optical axis incident on the reflective optical element M1. In FIG. 22, although the eyepiece optical system is not shown, the eyepiece optical system is arranged on the exit side of the fourth reflecting surface M4 or before and after including the reflecting surface M4, and on the exit side of the fourth reflecting surface M4. The observation image of the subject is observed by the eyeball of the observer located.

【０１３０】ところで、実施例１〜１２のローパスフィ
ルターＬＦは何れも３枚重ねで構成している。もちろ
ん、上述の実施例は、例えばローパスフィルターＬＦを
１枚で構成する等、前記した構成の範囲内で種々変更可
能である。By the way, the low-pass filters LF of the first to twelfth embodiments are each formed by stacking three sheets. Of course, the above-described embodiment can be variously modified within the range of the above-described configuration, for example, one low-pass filter LF is configured.

【０１３１】以上の各実施例において、最終レンズ群の
像側には、図示のように、近赤外カットフィルターＩＦ
又は近赤外カットコート面ＩＣを入射面側に施したロー
パスフィルターＬＦを有している。この近赤外カットフ
ィルターＩＦ、近赤外カットコート面ＩＣは、波長６０
０ｎｍでの透過率が８０％以上、波長７００ｎｍでの透
過率が１０％以下となるように構成されている。具体的
には、例えば次のような２７層の層構成からなる多層膜
である。ただし、設計波長は７８０ｎｍである。In each of the above embodiments, the near-infrared cut filter IF is provided on the image side of the final lens group as shown in the figure.
Alternatively, it has a low-pass filter LF in which a near-infrared cut coat surface IC is provided on the incident surface side. This near-infrared cut filter IF and near-infrared cut coat surface IC have a wavelength of 60
The transmittance at 0 nm is 80% or more, and the transmittance at a wavelength of 700 nm is 10% or less. Specifically, for example, it is a multilayer film having the following 27-layer structure. However, the design wavelength is 780 nm.

【０１３２】 基 板 材質 物理的膜厚（ｎｍ） λ／４ ─────────────────────────────── 第１層 Ａｌ2 Ｏ3 ５８．９６ ０．５０ 第２層 ＴｉＯ2 ８４．１９ １．００ 第３層 ＳｉＯ2 １３４．１４ １．００ 第４層 ＴｉＯ2 ８４．１９ １．００ 第５層 ＳｉＯ2 １３４．１４ １．００ 第６層 ＴｉＯ2 ８４．１９ １．００ 第７層 ＳｉＯ2 １３４．１４ １．００ 第８層 ＴｉＯ2 ８４．１９ １．００ 第９層 ＳｉＯ2 １３４．１４ １．００ 第10層 ＴｉＯ2 ８４．１９ １．００ 第11層 ＳｉＯ2 １３４．１４ １．００ 第12層 ＴｉＯ2 ８４．１９ １．００ 第13層 ＳｉＯ2 １３４．１４ １．００ 第14層 ＴｉＯ2 ８４．１９ １．００ 第15層 ＳｉＯ2 １７８．４１ １．３３ 第16層 ＴｉＯ2 １０１．０３ １．２１ 第17層 ＳｉＯ2 １６７．６７ １．２５ 第18層 ＴｉＯ2 ９６．８２ １．１５ 第19層 ＳｉＯ2 １４７．５５ １．０５ 第20層 ＴｉＯ2 ８４．１９ １．００ 第21層 ＳｉＯ2 １６０．９７ １．２０ 第22層 ＴｉＯ2 ８４．１９ １．００ 第23層 ＳｉＯ2 １５４．２６ １．１５ 第24層 ＴｉＯ2 ９５．１３ １．１３ 第25層 ＳｉＯ2 １６０．９７ １．２０ 第26層 ＴｉＯ2 ９９．３４ １．１８ 第27層 ＳｉＯ2 ８７．１９ ０．６５ ─────────────────────────────── 空 気 。Base plate Material Physical film thickness (nm) λ / 4 ─────────────────────────────── 1st layer Al 2 O 3 58.96 0.50 Second layer TiO 2 84.19 1.00 Third layer SiO 2 134.14 1.00 Fourth layer TiO 2 84.19 1.00 Fifth layer SiO 2 134. 14 1.00 6th layer TiO 2 84.19 1.00 7th layer SiO 2 134.14 1.00 8th layer TiO 2 84.19 1.00 9th layer SiO 2 134.14 1.00 10th Layer TiO 2 84.19 1.00 11th layer SiO 2 134.14 1.00 12th layer TiO 2 84.19 1.00 13th layer SiO 2 134.14 1.00 14th layer TiO 2 84.19 1.00 15th layer SiO 2 178.41 1.33 16th layer TiO 2 101.03 1.21 17th layer SiO 2 167.67 1.25 18th layer TiO 2 96.82 1.15 19th layer SiO 2 147.55 1.05 20th layer TiO 2 84.19 1.00 21st layer SiO 2 160 .97 1.20 22nd layer TiO 2 84.19 1.00 23rd layer SiO 2 154.26 1.15 24th layer TiO 2 95.13 1.13 25th layer SiO 2 160.97 1.20 26th layer TiO 2 99.34 1.18 27th layer SiO 2 87.19 0.65 ────────────────────────────── ──

【０１３３】上記の近赤外シャープカットコートの透過
率特性は図２３に示す通りである。The transmittance characteristics of the above-mentioned near infrared sharp cut coat are as shown in FIG.

【０１３４】また、ローパスフィルターＬＦの射出面側
には、図２４に示すような短波長域の色の透過を低滅す
る色フィルターを設けるか若しくはコーティングを行う
ことで、より一層電子画像の色再現性を高めている。Further, on the exit surface side of the low-pass filter LF, a color filter as shown in FIG. 24 for reducing the transmission of colors in the short wavelength range is provided or coated to further improve the color reproduction of the electronic image. It is increasing the nature.

【０１３５】具体的には、このフィルター若しくはコー
ティングにより、波長４００ｎｍ〜７００ｎｍで透過率
が最も高い波長の透過率に対する４２０ｎｍの波長の透
過率の比が１５％以上であり、その最も高い波長の透過
率に対する４００ｎｍの波長の透過率の比が６％以下で
あることが好ましい。Specifically, with this filter or coating, the ratio of the transmittance of the wavelength of 420 nm to the transmittance of the wavelength of 400 nm to 700 nm having the highest transmittance is 15% or more. The ratio of the transmittance at the wavelength of 400 nm to the transmittance is preferably 6% or less.

【０１３６】それにより、人間の目の色に対する認識
と、撮像及び再生される画像の色とのずれを低減させる
ことができる。言い換えると、人間の視覚では認識され
難い短波長側の色が、人間の目で容易に認識されること
による画像の劣化を防止することができる。As a result, it is possible to reduce the difference between the color recognition of the human eye and the color of the image picked up and reproduced. In other words, it is possible to prevent the deterioration of the image due to the color on the short wavelength side, which is difficult to be recognized by human eyes, to be easily recognized by human eyes.

【０１３７】上記の４００ｎｍの波長の透過率の比が６
％を越えると、人間の目では認識され難い単波長城が認
識し得る波長に再生されてしまい、逆に、上記の４２０
ｎｍの波長の透過率の比が１５％よりも小さいと、人間
の認識し得る波長城の再生が低くなり、色のバランスが
悪くなる。The transmittance ratio at the wavelength of 400 nm is 6
If it exceeds%, a single wavelength castle that is difficult for the human eye to recognize will be reproduced at a wavelength that can be recognized.
If the transmittance ratio of the wavelength of nm is less than 15%, the reproduction of the wavelength castle that can be recognized by humans becomes low, and the color balance becomes poor.

【０１３８】このような波長を制限する手段は、補色モ
ザイクフィルターを用いた撮像系においてより効果を奏
するものである。Such means for limiting the wavelength is more effective in the image pickup system using the complementary color mosaic filter.

【０１３９】上記各実施例では、図２４に示すように、
波長４００ｎｍにおける透過率を０％、４２０ｎｍにお
ける透過率を９０％、４４０ｎｍにて透過率のピーク１
００％となるコーティングとしている。In each of the above embodiments, as shown in FIG.
The transmittance at a wavelength of 400 nm is 0%, the transmittance at 420 nm is 90%, and the transmittance peak 1 is at 440 nm.
The coating is 00%.

【０１４０】前記した近赤外シャープカットコートとの
作用の掛け合わせにより、波長４５０ｎｍの透過率９９
％をピークとして、４００ｎｍにおける透過率を０％、
４２０ｎｍにおける透過率を８０％、６００ｎｍにおけ
る透過率を８２％、７００ｎｍにおける透過率を２％と
している。それにより、より忠実な色再現を行ってい
る。By multiplying the above-mentioned action with the near infrared sharp cut coat, the transmittance 99 at a wavelength of 450 nm is 99.
% As a peak, and the transmittance at 400 nm is 0%,
The transmittance at 420 nm is 80%, the transmittance at 600 nm is 82%, and the transmittance at 700 nm is 2%. Thereby, more faithful color reproduction is performed.

【０１４１】また、ローパスフィルターＬＦは、像面上
投影時の方位角度が水平（＝０°）と±４５°方向にそ
れぞれ結晶軸を有する３種類のフィルターを光軸方向に
重ねて使用しており、それぞれについて、水平にａμ
ｍ、±４５°方向にそれぞれSQRT(1/2) ×ａだけずらす
ことで、モアレ抑制を行っている。ここで、ＳＱＲＴは
前記のようにスクエアルートであり平方根を意味する。Further, the low-pass filter LF uses three kinds of filters having azimuth angles at the time of projection on the image plane that have crystal axes in the horizontal (= 0 °) and ± 45 ° directions, respectively, and are stacked in the optical axis direction. And horizontal aμ for each
Moire suppression is performed by shifting SQRT (1/2) × a in the m and ± 45 ° directions. Here, SQRT is a square root as described above and means a square root.

【０１４２】また、ＣＣＤの撮像面Ｉ上には、図２５に
示す通り、シアン、マゼンダ、イエロー、グリーン
（緑）の４色の色フィルターを撮像画素に対応してモザ
イク状に設けた補色モザイクフィルターを設けている。
これら４種類の色フィルターは、それぞれが略同じ数に
なるように、かつ、隣り合う画素が同じ種類の色フィル
ターに対応しないようにモザイク状に配置されている。
それにより、より忠実な色再現が可能となる。On the image pickup surface I of the CCD, as shown in FIG. 25, a complementary color mosaic in which four color filters of cyan, magenta, yellow and green (green) are provided in a mosaic pattern corresponding to the image pickup pixels. A filter is provided.
These four types of color filters are arranged in a mosaic pattern so that the numbers of the filters are substantially the same and adjacent pixels do not correspond to the same type of color filters.
This allows more faithful color reproduction.

【０１４３】補色モザイクフィルターは、具体的には、
図２５に示すように少なくとも４種類の色フィルターか
ら構成され、その４種類の色フィルターの特性は以下の
通りであることが好ましい。The complementary color mosaic filter is specifically
As shown in FIG. 25, at least four types of color filters are included, and the four types of color filters preferably have the following characteristics.

【０１４４】グリーンの色フイルターＧは波長ＧP に分
光強度のピークを有し、イエローの色フィルターＹe は
波長ＹP に分光強度のピークを有し、シアンの色フィル
ターＣは波長ＣP に分光強度のピークを有し、マゼンダ
の色フィルターＭは波長ＭP1とＭP2にピークを有し、以
下の条件を満足する。The green color filter G has a spectral intensity peak at a wavelength G P , the yellow color filter Y e has a spectral intensity peak at a wavelength Y P , and the cyan color filter C has a wavelength C P. The magenta color filter M has a peak of the spectral intensity and the peaks of the wavelengths M P1 and M P2 , which satisfy the following conditions.

【０１４５】５１０ｎｍ＜ＧP ＜５４０ｎｍ ５ｎｍ＜ＹP −ＧP ＜３５ｎｍ −１００ｎｍ＜ＣP −ＧP ＜−５ｎｍ ４３０ｎｍ＜ＭP1＜４８０ｎｍ ５８０ｎｍ＜ＭP2＜６４０ｎｍ さらに、グリーン、イエロー、シアンの色フィルターは
それぞれの分光強度のピークに対して波長５３０ｎｍで
は８０％以上の強度を有し、マゼンダの色フィルターは
その分光強度のピークに対して波長５３０ｎｍでは１０
％から５０％の強度を有することが、色再現性を高める
上でより好ましい。[0145] 510nm <G P <540nm 5nm < Y P -G P <35nm -100nm <C P -G P <-5nm 430nm <M P1 <480nm 580nm <M P2 <640nm Furthermore, green, yellow, cyan The filter has an intensity of 80% or more at a wavelength of 530 nm with respect to each spectral intensity peak, and the magenta color filter has an intensity of 10% at a wavelength of 530 nm with respect to the spectral intensity peak.
% To 50% is more preferable in order to improve color reproducibility.

【０１４６】上記各実施例におけるそれぞれの波長特性
の一例を図２６に示す。グリーンの色フィルターＧは５
２５ｎｍに分光強度のビークを有している。イエローの
色フィルターＹe は５５５ｎｍに分光強度のピークを有
している。シアンの色フイルターＣは５１０ｎｍに分光
強度のピークを有している。マゼンダの色フィルターＭ
は４４５ｎｍと６２０ｎｍにピークを有している。ま
た、５３０ｎｍにおける各色フィルターは、それぞれの
分光強度のピークに対して、Ｇは９９％、Ｙe は９５
％、Ｃは９７％、Ｍは３８％としている。FIG. 26 shows an example of each wavelength characteristic in each of the above embodiments. Green color filter G is 5
It has a spectral intensity beak at 25 nm. The yellow color filter Y e has a spectral intensity peak at 555 nm. Cyan color filter C has a peak of spectral intensity at 510 nm. Magenta color filter M
Has peaks at 445 nm and 620 nm. In addition, in each color filter at 530 nm, G is 99% and Y e is 95% with respect to each spectral intensity peak.
%, C is 97%, and M is 38%.

【０１４７】このような補色フイルターの場合、図示し
ないコントローラー（若しくは、デジタルカメラに用い
られるコントローラー）で、電気的に次のような信号処
理を行い、 輝度信号 Ｙ＝｜Ｇ＋Ｍ＋Ｙe ＋Ｃ｜×１／４ 色信号 Ｒ−Ｙ＝｜（Ｍ＋Ｙe ）−（Ｇ＋Ｃ）｜ Ｂ−Ｙ＝｜（Ｍ＋Ｃ）−（Ｇ＋Ｙe ）｜ の信号処理を経てＲ（赤）、Ｇ（緑）、Ｂ（青）の信号
に変換される。In the case of such a complementary color filter, a controller (or a controller used in a digital camera) (not shown) electrically performs the following signal processing to obtain a luminance signal Y = | G + M + Y e + C | × 1 / Four color signals R-Y = | (M + Y e )-(G + C) | B-Y = | (M + C)-(G + Y e ) | signal processing, and R (red), G (green), B (blue) Is converted to a signal.

【０１４８】ところで、上記した近赤外シャープカット
コートの配置位置は、光路上のどの位置であってもよ
い。また、ローパスフィルターＬＦの枚数も前記した通
り２枚でも１枚でも構わない。By the way, the arrangement position of the above-mentioned near infrared sharp cut coat may be any position on the optical path. Further, the number of low-pass filters LF may be two or one as described above.

【０１４９】また、各実施例の明るさ絞りの部分につい
ての詳細を図２７示す。ただし、この図は４群構成の場
合であり、第１群Ｇ１（第１−１群Ｇ１−１＋第１−２
群Ｇ１−２）における光路折り曲げプリズムＰは省いて
図示してある。撮像光学系の第１群Ｇ１と第２群Ｇ２と
の間の光軸上の絞り位置に、０段、−１段、−２段、−
３段、−４段の明るさ調節を可能とするターレット１０
を配置している。ターレット１０には、０段の調整をす
る開口形状が直径約４ｍｍの円形で固定の空間からなる
開口１Ａ（波長５５０ｎｍに対する透過率は１００％)
と、−１段補正するために開口１Ａの開口面積の約半分
の開口面積を有する開口形状が固定の透明な平行平板
（波長５５０ｎｍに対する透過率は９９％）からなる開
口１Ｂと、開口１Ｂと同じ面積の円形開口部を有し、−
２段、−３段、−４段に補正するため、各々波長５５０
ｎｍに対する透過率が５０％、２５％、１３％のＮＤフ
ィルターが設けられた開口部１Ｃ、１Ｄ、１Ｅとを有し
ている。FIG. 27 shows details of the aperture stop portion of each embodiment. However, this figure shows a case of a four-group configuration, and the first group G1 (1-1st group G1-1 + 1-2)
The optical path bending prism P in the group G1-2) is omitted in the drawing. At the diaphragm position on the optical axis between the first group G1 and the second group G2 of the imaging optical system, 0 stage, −1 stage, −2 stage, −
Turret 10 with 3 or -4 steps of brightness control
Are arranged. The turret 10 has an aperture 1A having a circular shape with a diameter of about 4 mm and a fixed space for adjusting 0 steps (100% transmittance for a wavelength of 550 nm).
And an opening 1B composed of a transparent parallel plate (having a transmittance of 99% for a wavelength of 550 nm) having a fixed opening shape and having an opening area approximately half that of the opening 1A for -1 step correction. Has circular openings of the same area,
Wavelength of 550 for correction to 2 steps, -3 steps, and -4 steps
It has openings 1C, 1D, and 1E provided with ND filters having transmittances of 50%, 25%, and 13% for nm.

【０１５０】そして、ターレット１０の回転軸１１の周
りの回動により何れかの開口を絞り位置に配することで
光量調節を行っている。Then, by rotating the turret 10 around the rotary shaft 11, one of the openings is arranged at the diaphragm position to adjust the light amount.

【０１５１】また、実効ＦナンバーＦno' がＦno' ＞ａ
／０．４μｍとなるときに、開口内に波長５５０ｎｍに
対する透過率が８０％未満のＮＤフィルターが配される
構成としている。具体的には、実施例１では、望遠端の
実効Ｆ値が上記式を満たすのは、絞り開放時（０段）に
対して−２段とした実行Ｆ値が９．０となるときであ
り、そのときに対応する開口は１Ｃとなる。それによ
り、絞りの回折現象による像の劣化を抑えている。Also, the effective F number F no 'is F no '> a
When /0.4 μm, an ND filter having a transmittance of less than 80% for a wavelength of 550 nm is arranged in the opening. Specifically, in the first embodiment, the effective F value at the telephoto end satisfies the above expression when the execution F value at −2 stops becomes 9.0 with respect to the full aperture (0 stops). Yes, the corresponding opening is 1C. This suppresses the deterioration of the image due to the diffraction phenomenon of the diaphragm.

【０１５２】また、図２７に示すターレット１０に代え
て、図２８（ａ）に示すターレット１０’を用いた例を
示す。撮像光学系の第１群Ｇ１と第２群Ｇ２との間の光
軸上の明るさ絞り位置に、０段、−１段、−２段、−３
段、−４段の明るさ調節を可能とするターレット１０’
を配置している。ターレット１０’には、０段の調整を
する開口形状が直径約４ｍｍの円形で固定の開口１Ａ'
と、−１段補正するために開口１Ａ’の開口面積の約半
分の開口面積を有する開口形状が固定の開口１Ｂ' と、
さらに開口面積が順に小さくなり、−２段、−３段、−
４段に補正するための形状が固定の開口部１Ｃ' 、１
Ｄ' 、１Ｅ' とを有している。そして、ターレット１
０’の回転軸１１の周りの回動により何れかの開口を絞
り位置に配することで光量調節を行っている。An example in which the turret 10 'shown in FIG. 27A is used instead of the turret 10 shown in FIG. At the aperture stop position on the optical axis between the first group G1 and the second group G2 of the imaging optical system, 0 stage, −1 stage, −2 stage, −3
Turret 10 'that allows you to adjust the brightness of 4 steps and 4 steps
Are arranged. The turret 10 'has a circular opening 1A' with an opening shape for adjusting 0 steps and a diameter of about 4 mm.
And an opening 1B 'having a fixed opening shape having an opening area that is about half the opening area of the opening 1A' for -1 step correction,
Furthermore, the opening area decreases in order, -2 steps, -3 steps,-
Apertures 1C ′ whose shape is fixed for four-stage correction, 1
D ', 1E'. And turret 1
The amount of light is adjusted by arranging any of the openings at the diaphragm position by rotating about the 0'rotation axis 11.

【０１５３】また、これら複数の開口の中の１Ａ' から
１Ｄ' にそれぞれ空間周波数特性の異なる光学的ローパ
スフィルターを配している。そして、図２８（ｂ）に示
すように、開口径が小さくなる程光学フィルターの空間
周波数特性を高く設定しており、それにより絞り込むこ
とによる回折現象による像の劣化を抑えている。なお、
図２８（ｂ）の各曲線は、ローパスフィルターのみの空
間周波数特性を示すものであり、各絞りの回折も含めた
特性は何れも等しくなるように設定しているものであ
る。Further, optical low-pass filters having different spatial frequency characteristics are arranged in 1A 'to 1D' in the plurality of apertures. Then, as shown in FIG. 28B, the spatial frequency characteristic of the optical filter is set to be higher as the aperture diameter becomes smaller, thereby suppressing the deterioration of the image due to the diffraction phenomenon due to the narrowing. In addition,
Each curve in FIG. 28B shows the spatial frequency characteristic of only the low-pass filter, and the characteristics including the diffraction of each diaphragm are set to be equal.

【０１５４】さて、以上のような本発明の電子撮像装置
は、ズームレンズ等の結像光学系で物体像を形成しその
像をＣＣＤや銀塩フィルムといった撮像素子に受光させ
て撮影を行う撮影装置、とりわけデジタルカメラやビデ
オカメラ、情報処理装置の例であるパソコン、電話、特
に持ち運びに便利な携帯電話等に用いることができる。
以下に、その実施形態を例示する。In the electronic image pickup apparatus according to the present invention as described above, an image of an object is formed by an image forming optical system such as a zoom lens, and the image is picked up by an image pickup device such as a CCD or a silver salt film for image pickup. The present invention can be used for devices, particularly digital cameras and video cameras, personal computers, which are examples of information processing devices, telephones, and particularly mobile phones that are convenient to carry.
The embodiment will be exemplified below.

【０１５５】図２９〜図３１は、本発明による結像光学
系をデジタルカメラの撮影光学系４１に組み込んだ構成
の概念図を示す。図２９はデジタルカメラ４０の外観を
示す前方斜視図、図３０は同後方斜視図、図３１はデジ
タルカメラ４０の構成を示す断面図である。デジタルカ
メラ４０は、この例の場合、撮影用光路４２を有する撮
影光学系４１、ファインダー用光路４４を有するファイ
ンダー光学系４３、シャッター４５、フラッシュ４６、
液晶表示モニター４７等を含み、カメラ４０の上部に配
置されたシャッター４５を押圧すると、それに連動して
撮影光学系４１、例えば実施例２の光路折り曲げズーム
光学系を通して撮影が行われる。撮影光学系４１によっ
て形成された物体像が、近赤外カットフィルターＩＦと
光学的ローパスフィルターＬＦを介してＣＣＤ４９の撮
像面上に形成される。このＣＣＤ４９で受光された物体
像は、処理手段５１を介し、電子画像としてカメラ背面
に設けられた液晶表示モニター４７に表示される。ま
た、この処理手段５１には記録手段５２が接続され、撮
影された電子画像を記録することもできる。なお、この
記録手段５２は処理手段５１と別体に設けてもよいし、
フロッピー（登録商標）ディスクやメモリーカード、Ｍ
Ｏ等により電子的に記録書込を行うように構成してもよ
い。また、ＣＣＤ４９に代わって銀塩フィルムを配置し
た銀塩カメラとして構成してもよい。29 to 31 are conceptual diagrams showing a configuration in which the image forming optical system according to the present invention is incorporated in the photographing optical system 41 of a digital camera. 29 is a front perspective view showing the external appearance of the digital camera 40, FIG. 30 is a rear perspective view of the same, and FIG. 31 is a sectional view showing the configuration of the digital camera 40. In this example, the digital camera 40 includes a photographing optical system 41 having a photographing optical path 42, a finder optical system 43 having a finder optical path 44, a shutter 45, and a flash 46.
When the shutter 45, which includes the liquid crystal display monitor 47 and the like and is disposed above the camera 40, is pressed, the photographing is performed through the photographing optical system 41, for example, the optical path bending zoom optical system of the second embodiment in conjunction therewith. The object image formed by the photographing optical system 41 is formed on the image pickup surface of the CCD 49 via the near infrared cut filter IF and the optical low pass filter LF. The object image received by the CCD 49 is displayed as an electronic image on the liquid crystal display monitor 47 provided on the rear surface of the camera via the processing means 51. Further, the recording means 52 is connected to the processing means 51, and the captured electronic image can be recorded. The recording means 52 may be provided separately from the processing means 51,
Floppy (registered trademark) disk, memory card, M
Recording and writing may be performed electronically by O or the like. Further, it may be configured as a silver salt camera in which a silver salt film is arranged instead of the CCD 49.

【０１５６】さらに、ファインダー用光路４４上にはフ
ァインダー用対物光学系５３が配置してある。このファ
インダー用対物光学系５３によって形成された物体像
は、像正立部材であるポロプリズム５５の視野枠５７上
に形成される。このポリプリズム５５の後方には、正立
正像にされた像を観察者眼球Ｅに導く接眼光学系５９が
配置されている。なお、撮影光学系４１及びファインダ
ー用対物光学系５３の入射側、接眼光学系５９の射出側
にそれぞれカバー部材５０が配置されている。Further, a finder objective optical system 53 is arranged on the finder optical path 44. The object image formed by the finder objective optical system 53 is formed on the field frame 57 of the Porro prism 55 which is an image erecting member. Behind the poly prism 55, an eyepiece optical system 59 for guiding an erect image to the observer's eye E is arranged. A cover member 50 is arranged on each of the incident side of the photographing optical system 41 and the objective optical system 53 for the finder, and the exit side of the eyepiece optical system 59.

【０１５７】このように構成されたデジタルカメラ４０
は、撮影光学系４１が広画角で高変倍比であり、収差が
良好で、明るく、フィルター等が配置できるバックフォ
ーカスの大きなズームレンズであるので、高性能・低コ
スト化が実現できる。[0157] The digital camera 40 configured as above
Since the photographic optical system 41 is a zoom lens having a wide angle of view, a high zoom ratio, good aberrations, a high brightness, and a large back focus in which filters and the like can be arranged, high performance and low cost can be realized.

【０１５８】なお、図３１の例では、カバー部材５０と
して平行平面板を配置しているが、パワーを持ったレン
ズを用いてもよい。In the example of FIG. 31, a plane parallel plate is arranged as the cover member 50, but a lens having power may be used.

【０１５９】次に、本発明の結像光学系が対物光学系と
して内蔵された情報処理装置の一例であるパソコンが図
３２〜図３４に示される。図３２はパソコン３００のカ
バーを開いた前方斜視図、図３３はパソコン３００の撮
影光学系３０３の断面図、図３４は図３２の状態の側面
図である。図３２〜図３４に示されるように、パソコン
３００は、外部から繰作者が情報を入力するためのキー
ボード３０１と、図示を省略した情報処理手段や記録手
段と、情報を操作者に表示するモニター３０２と、操作
者自身や周辺の像を撮影するための撮影光学系３０３と
を有している。ここで、モニター３０２は、図示しない
バックライトにより背面から照明する透過型液晶表示素
子や、前面からの光を反射して表示する反射型液晶表示
素子や、ＣＲＴディスプレイ等であってよい。また、図
中、撮影光学系３０３は、モニター３０２の右上に内蔵
されているが、その場所に限らず、モニター３０２の周
囲や、キーボード３０１の周囲のどこであってもよい。Next, FIGS. 32 to 34 show a personal computer as an example of an information processing apparatus in which the image forming optical system of the present invention is incorporated as an objective optical system. 32 is a front perspective view of the personal computer 300 with the cover opened, FIG. 33 is a sectional view of the photographing optical system 303 of the personal computer 300, and FIG. 34 is a side view of the state of FIG. As shown in FIGS. 32 to 34, the personal computer 300 includes a keyboard 301 for the preparer to input information from the outside, information processing means and recording means (not shown), and a monitor for displaying information to the operator. It has an image pickup optical system 303 for taking an image of the operator himself or herself and surroundings. Here, the monitor 302 may be a transmissive liquid crystal display element that illuminates from the back side with a backlight (not shown), a reflective liquid crystal display element that reflects and displays light from the front side, a CRT display, or the like. Further, in the figure, the photographing optical system 303 is built in the upper right of the monitor 302, but not limited to that location, it may be anywhere around the monitor 302 or around the keyboard 301.

【０１６０】この撮影光学系３０３は、撮影光路３０４
上に、本発明による光路折り曲げズーム光学系（図では
略記）からなる対物レンズ１１２と、像を受光する撮像
素子チップ１６２とを有している。これらはパソコン３
００に内蔵されている。This photographing optical system 303 has a photographing optical path 304.
An objective lens 112 including an optical path bending zoom optical system (abbreviated in the drawing) according to the present invention and an image pickup device chip 162 that receives an image are provided on the top. These are PC 3
It is built into 00.

【０１６１】ここで、撮像素子チップ１６２上には光学
的ローパスフィルターＬＦが付加的に貼り付けられて撮
像ユニット１６０として一体に形成され、対物レンズ１
１２の鏡枠１１３の後端にワンタッチで嵌め込まれて取
り付け可能になっているため、対物レンズ１１２と撮像
素子チップ１６２の中心合わせや面間隔の調整が不要で
あり、組立が簡単となっている。また、鏡枠１１３の先
端（図示略）には、対物レンズ１１２を保護するための
カバーガラス１１４が配置されている。なお、鏡枠１１
３中のズームレンズの駆動機構等は図示を省いてある。Here, an optical low-pass filter LF is additionally attached on the image pickup element chip 162 to integrally form an image pickup unit 160, and the objective lens 1
Since it can be fitted and attached to the rear end of the lens frame 113 of No. 12 with one touch, the centering of the objective lens 112 and the image pickup device chip 162 and the adjustment of the surface interval are unnecessary, and the assembly is easy. . Further, a cover glass 114 for protecting the objective lens 112 is arranged at the tip (not shown) of the lens frame 113. The lens frame 11
The drive mechanism and the like of the zoom lens in 3 are not shown.

【０１６２】撮像素子チップ１６２で受光された物体像
は、端子１６６を介して、パソコン３００の処理手段に
入力され、電子画像としてモニター３０２に表示され
る、図３２には、その一例として、操作者の撮影された
画像３０５が示されている。また、この画像３０５は、
処理手段を介し、インターネットや電話を介して、遠隔
地から通信相手のパソコンに表示されることも可能であ
る。The object image received by the image pickup device chip 162 is input to the processing means of the personal computer 300 via the terminal 166 and displayed on the monitor 302 as an electronic image. In FIG. A photographed image 305 of the person is shown. Also, this image 305
It is also possible to display it on a personal computer of a communication partner from a remote place via the processing means and the Internet or a telephone.

【０１６３】次に、本発明の結像光学系が撮影光学系と
して内蔵された情報処理装置の一例である電話、特に持
ち運びに便利な携帯電話が図３５に示される。図３５
（ａ）は携帯電話４００の正面図、図３５（ｂ）は側面
図、図３５（ｃ）は撮影光学系４０５の断面図である。
図３５（ａ）〜（ｃ）に示されるように、携帯電話４０
０は、操作者の声を情報として入力するマイク部４０１
と、通話相手の声を出力するスピーカ部４０２と、操作
者が情報を入力する入力ダイアル４０３と、操作者自身
や通話相手等の撮影像と電話番号等の情報を表示するモ
ニター４０４と、撮影光学系４０５と、通信電波の送信
と受信を行うアンテナ４０６と、画像情報や通信情報、
入力信号等の処理を行う処理手段（図示せず）とを有し
ている。ここで、モニター４０４は液晶表示素子であ
る。また、図中、各構成の配置位置は、特にこれらに限
られない。この撮影光学系４０５は、撮影光路４０７上
に配置された本発明による光路折り曲げズーム光学系
（図では略記）からなる対物レンズ１１２と、物体像を
受光する撮像素子チップ１６２とを有している。これら
は、携帯電話４００に内蔵されている。Next, FIG. 35 shows a telephone, which is an example of an information processing apparatus in which the imaging optical system of the present invention is incorporated as a photographing optical system, in particular, a portable telephone which is convenient to carry. Fig. 35
35A is a front view of the mobile phone 400, FIG. 35B is a side view thereof, and FIG. 35C is a cross-sectional view of the photographing optical system 405.
As shown in FIGS. 35A to 35C, the mobile phone 40
0 indicates a microphone unit 401 for inputting the operator's voice as information.
A speaker unit 402 for outputting the voice of the other party, an input dial 403 for the operator to input information, a monitor 404 for displaying a photographed image of the operator himself or the other party and information such as a telephone number, and photographing. An optical system 405, an antenna 406 for transmitting and receiving communication radio waves, image information and communication information,
And processing means (not shown) for processing the input signal and the like. Here, the monitor 404 is a liquid crystal display element. Further, in the drawing, the arrangement position of each component is not particularly limited to these. The photographing optical system 405 includes an objective lens 112 which is arranged on a photographing optical path 407 and includes an optical path bending zoom optical system (not shown in the figure) according to the present invention, and an image pickup element chip 162 which receives an object image. . These are built into the mobile phone 400.

【０１６４】ここで、撮像素子チップ１６２上には光学
的ローパスフィルターＬＦが付加的に貼り付けられて撮
像ユニット１６０として一体に形成され、対物レンズ１
１２の鏡枠１１３の後端にワンタッチで嵌め込まれて取
り付け可能になっているため、対物レンズ１１２と撮像
素子チップ１６２の中心合わせや面間隔の調整が不要で
あり、組立が簡単となっている。また、鏡枠１１３の先
端（図示略）には、対物レンズ１１２を保護するための
カバーガラス１１４が配置されている。なお、鏡枠１１
３中のズームレンズの駆動機構等は図示を省いてある。Here, an optical low-pass filter LF is additionally attached on the image pickup element chip 162 to integrally form an image pickup unit 160, and the objective lens 1
Since it can be fitted and attached to the rear end of the lens frame 113 of No. 12 with one touch, the centering of the objective lens 112 and the image pickup device chip 162 and the adjustment of the surface interval are unnecessary, and the assembly is easy. . Further, a cover glass 114 for protecting the objective lens 112 is arranged at the tip (not shown) of the lens frame 113. The lens frame 11
The drive mechanism and the like of the zoom lens in 3 are not shown.

【０１６５】撮影素子チップ１６２で受光された物体像
は、端子１６６を介して、図示していない処理手段に入
力され、電子画像としてモニター４０４に、又は、通信
相手のモニターに、又は、両方に表示される。また、通
信相手に画像を送信する場合、撮像素子チップ１６２で
受光された物体像の情報を、送信可能な信号へと変換す
る信号処理機能が処理手段には含まれている。The object image received by the image pickup element chip 162 is input to a processing means (not shown) through a terminal 166 and is displayed as an electronic image on the monitor 404, on the monitor of the communication partner, or on both. Is displayed. Further, when transmitting an image to a communication partner, the processing means includes a signal processing function of converting the information of the object image received by the image sensor chip 162 into a transmittable signal.

【０１６６】以上の本発明の電子撮像装置は例えば次の
ように構成することができる。The electronic image pickup apparatus of the present invention described above can be configured, for example, as follows.

【０１６７】〔１〕 広角端から望遠端に変倍する際に
物体側にのみ移動する群を少なくとも１つ含み、変倍時
に可動な全ての群の最も物体側のレンズよりも物体側に
光路を折り曲げるための反射光学素子を少なくとも１つ
含む光路折り曲げズーム光学系及びその像側に配置され
た電子撮像素子を有することを特徴とする電子撮像装
置。[1] At least one group that moves only to the object side when zooming from the wide-angle end to the telephoto end is included, and the optical path is closer to the object side than the most object-side lens of all the groups that are movable during zooming. An electronic image pickup apparatus comprising: an optical path bending zoom optical system including at least one reflective optical element for bending the optical axis; and an electronic image pickup element arranged on the image side thereof.

【０１６８】〔２〕 最も物体側のレンズから前記変倍
時に可動な全ての群の中最も物体側の面の直前までの部
分系の合成焦点距離が負である上記１記載の電子撮像装
置。[2] The electronic image pickup device according to the above item 1, wherein the combined focal length of the subsystems from the lens closest to the object side to immediately before the surface closest to the object side of all the groups that are movable during zooming is negative.

【０１６９】〔３〕 物体側より順に、負レンズ群と光
路折り曲げのための反射光学素子とにて構成された第１
−１群、正レンズを１枚含む第１−２群、正の屈折力を
有する第２群を含み、広角端から望遠端に変倍する際は
前記第２群が物体側にのみ移動する光路折り曲げズーム
光学系及びその像側に配置された電子撮像素子を有する
ことを特徴とする電子撮像装置。[3] A first lens element which is composed of, in order from the object side, a negative lens group and a reflective optical element for bending the optical path.
-1 group, a 1-2 group including one positive lens, and a second group having a positive refractive power, the second group moves only to the object side when zooming from the wide-angle end to the telephoto end. An electronic image pickup device comprising an optical path bending zoom optical system and an electronic image pickup element arranged on the image side thereof.

【０１７０】〔４〕 物体側より順に、入射面、射出面
の少なくとも一方が凹面である光路折り曲げのための反
射光学素子であるプリズムを含む第１−１群、正レンズ
を１枚含む第１−２群、正の屈折力を有する第２群を含
み、広角端から望遠端に変倍する際は前記第２群が物体
側へ単調に移動するような光路折り曲げズーム光学系及
びその像側に配置された電子撮像素子を有することを特
徴とする電子撮像装置。[4] From the object side, in order from the object side, at least one of an entrance surface and an exit surface is a concave surface, a first-first group including a prism which is a reflective optical element for bending an optical path, and a first group including one positive lens. -2 group, an optical path bending zoom optical system including a second group having a positive refractive power, such that the second group monotonously moves toward the object side when zooming from the wide-angle end to the telephoto end, and its image side An electronic image pickup device having an electronic image pickup device disposed in the.

【０１７１】〔５〕 前記第２群の像側に正の屈折力を
有する第３群を含み、広角端から望遠端に変倍する際は
前記第２群と第３群が相対的間隔を変えながら移動する
ことを特徴とする上記３又は４記載の電子撮像装置。[5] The image side of the second lens unit includes a third lens unit having a positive refractive power, and when zooming from the wide-angle end to the telephoto end, the second lens unit and the third lens unit have a relative distance. The electronic image pickup device as described in 3 or 4 above, wherein the electronic image pickup device moves while changing.

【０１７２】〔６〕 沈胴時に前記反射光学素子を退避
し、その空間に前記反射光学素子よりも物体側にある負
レンズ群を収納することを特徴とする上記３又は４記載
の電子撮像装置。[6] The electronic image pickup device according to the above item 3 or 4, wherein the reflective optical element is retracted at the time of collapsing, and a negative lens group closer to the object side than the reflective optical element is housed in the space.

【０１７３】〔７〕 物体側より順に、負の第１レンズ
群、光路折り曲げのための反射光学素子、正の第２レン
ズ群を有し、沈胴時に前記反射光学素子を退避し、その
空間に前記第１レンズ群を収納する光路折り曲げズーム
光学系及びその像側に配置された電子撮像素子を有する
ことを特徴とする電子撮像装置。[7] It has, in order from the object side, a negative first lens group, a reflective optical element for bending the optical path, and a positive second lens group. An electronic image pickup apparatus comprising: an optical path bending zoom optical system that houses the first lens group; and an electronic image pickup element that is arranged on an image side thereof.

【０１７４】〔８〕 前記第１レンズ群の収納時、前記
第２レンズ群が撮影時の最も像面から離れた位置よりも
像側に退避することを特徴とする上記７記載の電子撮像
装置。[8] When the first lens group is housed, the second lens group is retracted toward the image side with respect to the position farthest from the image plane during photographing, .

【０１７５】[0175]

〔９〕 前記反射光学素子を薄板に反射ミ
ラーコーティングを施した反射ミラーで構成し、前記収
納時、前記反射ミラーを反射面が折り曲げ前の光軸と垂
直な方向にチルトすることを特徴とする上記６又は７記
載の電子撮像装置。[9] It is characterized in that the reflection optical element is composed of a reflection mirror coated with a reflection mirror on a thin plate, and the reflection mirror is tilted in a direction perpendicular to the optical axis before the reflection surface is bent during the storage. The electronic image pickup device according to 6 or 7 above.

【０１７６】〔１０〕 前記反射光学素子が像面方向に
退避することを特徴とする上記８記載の電子撮像装置。[10] The electronic image pickup device according to the above item 8, wherein the reflective optical element is retracted in the image plane direction.

【０１７７】〔１１〕 反射光学素子を含む撮影光学系
と電子撮像素子との間に、前記反射光学素子での反射前
後の光軸を含む平面に対し略垂直の側にも光路を分割す
る第２の反射面を設け、その反射側に沿って前記第２の
反射面の法線に対し略直角である法線を有し、かつ、前
記第２の反射面の光軸を含む入射平面と略同一の入射平
面を有する第３の反射面を設け、さらに、反射後の光路
が前記撮影光学系の入射側の光軸と略平行に射出するよ
うに第４の反射面を設けたことを特徴とする電子撮像装
置。[11] Between the photographing optical system including the reflection optical element and the electronic image pickup element, the optical path is divided also on the side substantially perpendicular to the plane including the optical axis before and after reflection by the reflection optical element. An incident plane including two reflection surfaces, having a normal line along the reflection side that is substantially perpendicular to the normal line of the second reflection surface, and including the optical axis of the second reflection surface; A third reflecting surface having substantially the same plane of incidence is provided, and further, a fourth reflecting surface is provided so that the optical path after reflection exits substantially parallel to the optical axis on the incident side of the photographing optical system. A characteristic electronic imaging device.

【０１７８】〔１２〕 前記反射光学素子の反射面の直
前の屈折面から反射面の直後の屈折面までの光軸上の空
気換算長ｄが以下の条件（ａ）を満足することを特徴と
する上記３又は４記載の電子撮像装置。[12] The air-converted length d on the optical axis from the refracting surface immediately before the reflecting surface of the reflecting optical element to the refracting surface immediately after the reflecting surface satisfies the following condition (a): 3. The electronic image pickup device according to 3 or 4 above.

【０１７９】（ａ） ０．５＜ｄ／Ｌ＜１．６ ただし、Ｌは電子撮像素子の有効撮像領域の対角長であ
る。(A) 0.5 <d / L <1.6 where L is the diagonal length of the effective image pickup area of the electronic image pickup device.

【０１８０】〔１３〕 前記反射面により光路を折り曲
げる方向の画角が２５°±３°の範囲内の場合は以下の
条件（ａ−１）を満足し、前記画角が１９°±３°の範
囲内の場合は以下の条件（ａ−２）を満足することを特
徴とする上記１２記載の電子撮像装置。[13] When the angle of view in the direction of bending the optical path by the reflecting surface is within the range of 25 ° ± 3 °, the following condition (a-1) is satisfied, and the angle of view is 19 ° ± 3 °. 13. The electronic image pickup apparatus according to the above 12, wherein the following condition (a-2) is satisfied in the range of.

【０１８１】（ａ−１） ０．８＜ｄ／Ｌ＜１．４ （ａ−２） ０．５＜ｄ／Ｌ＜１．０ 〔１４〕 前記反射光学素子を、平面部を有するプリズ
ムの平面部に平凹レンズが接合さた接合プリズムで構成
したことを特徴とする上記１、３、４の何れか１項記載
の電子撮像装置。(A-1) 0.8 <d / L <1.4 (a-2) 0.5 <d / L <1.0 [14] The reflective optical element is a prism having a plane portion. 5. The electronic image pickup device according to any one of the items 1, 3, and 4, wherein the electronic image pickup device is configured by a cemented prism in which a plano-concave lens is cemented to a plane portion.

【０１８２】〔１５〕 最も物体側に正レンズを配した
ことを特徴とする上記１、３、４の何れか１項記載の電
子撮像装置。[15] The electronic image pickup apparatus described in any one of the above items 1, 3, and 4, characterized in that a positive lens is arranged closest to the object side.

【０１８３】〔１６〕 前記ズーム光学系の最も像面側
に非球面を有する単レンズにて構成した最終群を有する
ことを特徴とする上記１、３、４の何れか１項記載の電
子撮像装置。[16] The electronic image pickup according to any one of the above items 1, 3 and 4, characterized in that the zoom optical system has a final group composed of a single lens having an aspherical surface closest to the image plane. apparatus.

【０１８４】〔１７〕 前記最終群は固定であることを
特徴とする上記１６記載の電子撮像装置。[17] The electronic image pickup apparatus according to the above item 16, wherein the final group is fixed.

【０１８５】〔１８〕 前記ズーム光学系の最も像面側
に最終群を配し、前記最終群を除く前記第２群以降の群
でフォーカシングを行うことを特徴とする上記１、３、
４の何れか１項記載の電子撮像装置。[18] The above-mentioned 1, 3, wherein the final group is disposed on the most image side of the zoom optical system, and focusing is performed by the second and subsequent groups excluding the final group.
4. The electronic image pickup device according to any one of 4 above.

【０１８６】〔１９〕 前記ズーム光学系の最も像面側
に最終群を配し、前記最終群から物体側に２番目の群で
フォーカシングを行うことを特徴とする上記１、３、４
の何れか１項記載の電子撮像装置。[19] The final group is disposed on the most image plane side of the zoom optical system, and focusing is performed by the second group from the final group to the object side.
The electronic imaging device according to claim 1.

【０１８７】〔２０〕 前記最終群から物体側に２番目
の群と３番目の群の望遠端での無限遠物点合焦時の光軸
上空気間隔ＤFTが以下の条件式を満足することを特徴と
する上記１９記載の電子撮像装置。[20] The air distance D FT on the optical axis when focusing on an object point at infinity at the telephoto end of the second and third groups from the last group to the object side satisfies the following conditional expression. 21. The electronic image pickup device as described in 19 above.

【０１８８】（ｂ） ０．１＜ＤFT／ｆT ＜１．５ ただし、ｆT は望遠端での無限遠物点合焦時の全系焦点
距離である。(B) 0.1 <D FT / f T <1.5 where f T is the focal length of the entire system when focusing on an object point at infinity at the telephoto end.

【０１８９】〔２１〕 無限遠合焦時に広角端から望遠
端に変倍する際の前記第２群、前記第３群のそれぞれの
移動量Ｍ2 、Ｍ3 の比が以下の条件（ｃ）を満足するこ
とを特徴とする上記５記載の電子撮像装置。[21] The ratio of the moving amounts M 2 and M 3 of the second group and the third group when zooming from the wide-angle end to the telephoto end during focusing at infinity is under the following condition (c). The electronic image pickup device according to the above item 5, characterized in that

【０１９０】（ｃ） ０．５＜Ｍ3 ／Ｍ2 ＜２．０ 〔２２〕 前記第１−２群を含みそれよりも物体側の群
全体は変倍時、フォーカシング時共に固定であることを
特徴とする上記３又は４記載の電子撮像装置。(C) 0.5 <M 3 / M 2 <2.0 [22] The entire group including the first-second group and closer to the object side than the first-second group is fixed during zooming and during focusing. 5. The electronic image pickup device described in 3 or 4 above.

【０１９１】〔２３〕 前記第１−２群は、物体側から
順に、負レンズ、正レンズの２枚若しくは正レンズ１枚
から構成したことを特徴とする上記３、４、５の何れか
１項記載の電子撮像装置。[23] The first-second lens group is composed of, in order from the object side, two negative lens elements and one positive lens element or one positive lens element. The electronic imaging device according to the item.

【０１９２】〔２４〕 前記第１−１群における光路を
折り曲げるための前記反射光学素子より物体側の負レン
ズ群は、物体側に凸の負レンズ１枚のみであることを特
徴とする上記３記載の電子撮像装置。[24] The negative lens group closer to the object side than the reflective optical element for bending the optical path in the first-first lens group is only one negative lens convex toward the object side. The electronic imaging device described.

【０１９３】〔２５〕 前記第１−１群と前記第１−２
群のパワー比が以下の条件（ｄ）を満足することを特徴
とする上記３又は４記載の電子撮像装置。[25] The first-first group and the first-second group
The electronic image pickup device according to the above item 3 or 4, wherein the power ratio of the group satisfies the following condition (d).

【０１９４】 （ｄ） −０．８＜ｆ11／ｆ12＜０．９ ただし、ｆ11は第１−１群の焦点距離、ｆ12は第１−２
群の焦点距離である。(D) −0.8 <f 11 / f 12 <0.9, where f 11 is the focal length of the 1-1st lens group, and f 12 is the 1-2nd lens.
The focal length of the group.

【０１９５】〔２６〕 前記第２群又は前記第３群の何
れか一方が単レンズであることを特徴とする上記５記載
の電子撮像装置。[26] The electronic image pickup device according to the above item 5, wherein one of the second group and the third group is a single lens.

【０１９６】〔２７〕 前記第２群又は前記第３群の何
れか一方が単レンズで構成され、他方の群が少なくとも
凹レンズを含むことを特徴とする上記５記載の電子撮像
装置。[27] The electronic image pickup device according to the above item 5, wherein one of the second group and the third group includes a single lens, and the other group includes at least a concave lens.

【０１９７】〔２８〕 前記第２群と前記第３群は変倍
時に相対的間隔を変えながら同一方向に移動することを
特徴とする上記５記載の電子撮像装置。[28] The electronic image pickup device according to the above item 5, wherein the second lens unit and the third lens unit move in the same direction while changing their relative intervals during zooming.

【０１９８】〔２９〕 望遠端において以下の条件
（ｅ）を満足することを特徴とする上記５記載の電子撮
像装置。[29] The electronic image pickup apparatus as described in 5 above, which satisfies the following condition (e) at the telephoto end.

【０１９９】（ｅ） ０．７＜−βRt＜２．１ ただし、βRtは第２群以降の望遠端における合成倍率
（無限遠物点）である。(E) 0.7 <-β Rt <2.1 where β Rt is the composite magnification (infinity object point) at the telephoto end after the second lens unit.

【０２００】〔３０〕 前記ズーム光学系後方にある電
子撮像素子よりも物体側に、６００ｎｍでの透過率が８
０％以上、７００ｎｍでの透過率が１０％以下の近赤外
シャープカットコートを用いたフィルターを配したこと
を特徴とする上記１、３、４の何れか１項記載の電子撮
像装置。[30] The transmittance at 600 nm is 8 on the object side of the electronic image sensor behind the zoom optical system.
5. The electronic image pickup device according to any one of 1, 3, and 4, wherein a filter using a near infrared sharp cut coat having a transmittance of 0% or more and a transmittance at 700 nm of 10% or less is arranged.

【０２０１】〔３１〕 前記電子撮像素子が補色モザイ
クフィルターを有することを特徴とする上記３０記載の
電子撮像装置。[31] The electronic image pickup device according to the above item 30, wherein the electronic image pickup device has a complementary color mosaic filter.

【０２０２】〔３２〕 前記ズーム光学系後方にある電
子撮像素子よりも物体側に総厚ｔ LPF （ｍｍ）が以下の
条件（ｆ）を満たす光学的ローパスフィルターを配した
ことを特徴とする上記１、３、４の何れか１項記載の電
子撮像装置。[32] The electric power provided at the rear of the zoom optical system.
Total thickness t on the object side of the child image sensor LPF(Mm) is
An optical low-pass filter satisfying the condition (f) was arranged.
The battery according to any one of the above 1, 3, 4 characterized in that
Child imaging device.

【０２０３】 （ｆ） ０．１５ａ＜ｔLPF ＜０．４５ａ ただし、ａは電子撮像素子の水平画素ピッチ（単位μ
ｍ）であり、ａは５μｍ以下である。(F) 0.15a <t LPF <0.45a where a is the horizontal pixel pitch (unit μ
m) and a is 5 μm or less.

【０２０４】〔３３〕 前記ズーム光学系後方にある電
子撮像素子よりも物体側に総厚ｔ LPF （ｍｍ）が以下の
条件（ｆ' ）を満たす光学的ローパスフィルターを配し
たことを特徴とする上記１、３、４の何れか１項記載の
電子撮像装置。[33] The electric power provided at the rear of the zoom optical system.
Total thickness t on the object side of the child image sensor LPF(Mm) is
An optical low pass filter that satisfies the condition (f ')
5. The method according to any one of the above 1, 3, 4 characterized in that
Electronic imaging device.

【０２０５】 （ｆ’） ０．１３ａ＜ｔLPF ＜０．４２ａ ただし、ａは電子撮像素子の水平画素ピッチ（単位μ
ｍ）であり、ａは４μｍ以下である。(F ′) 0.13a <t LPF <0.42a where a is the horizontal pixel pitch (unit μ
m) and a is 4 μm or less.

【０２０６】〔３４〕 開口形状が固定の複数の開口を
有し、その中の１つを第１群の最も像側のレンズ面と第
３群の最も物体側のレンズ面の間の何れかの光路内に挿
入可能であり、かつ、他の開口と交換可能とすることで
像面照度の調節を行うことを特徴とする上記１、３、４
の何れか１項記載の電子撮像装置。[34] A plurality of apertures each having a fixed aperture shape are provided, and one of them is located between the most image side lens surface of the first group and the most object side lens surface of the third group. The illuminance of the image plane is adjusted by being able to be inserted into the optical path of the lens and being exchangeable with another aperture.
The electronic imaging device according to claim 1.

【０２０７】〔３５〕 前記複数の開口の中、一部の開
口内に５５０ｎｍに対する透過率が８０％未満である媒
体を有すると共に、他の一部の開口の波長５５０ｎｍに
対する透過率を８０％以上としたことを特徴とする上記
３４記載の電子撮像装置。[35] Among the plurality of openings, a medium having a transmittance of less than 80% for 550 nm is provided in a part of the openings, and the transmittance of another part of the openings for a wavelength of 550 nm is 80% or more. 35. The electronic image pickup device according to the above item 34.

【０２０８】〔３６〕 ズーム光学系の焦点距離と入射
瞳の直径から求まるＦナンバーをＦno、前記開口におけ
る波長５５０ｎｍにおける透過率をＴとしたときのＦno
／√Ｔを実効Ｆno’とし、前記電子撮像素子の水平画素
ピッチをａとするとき、Ｆ no’＞ａ（μｍ）／０．４μ
ｍとなるような実効Ｆナンバーに相当する光量になるよ
うに調節する場合は、開口内に５５０ｎｍに対する透過
率Ｔが８０％未満の媒体を備えた開口を前記ズーム光学
系の光路に挿入するようにしたことを特徴とする上記３
４記載の電子撮像装置。[36] Focal Length of Zoom Optical System and Incident
The F number obtained from the diameter of the pupil is Fno, In the opening
F when the transmittance at a wavelength of 550 nm is Tno
/ √T is effective Fno'And the horizontal pixel of the electronic image sensor
When the pitch is a, F no′> A (μm) /0.4μ
The amount of light will be equivalent to the effective F number so that m will be obtained.
Transmission to 550 nm within the aperture
The aperture provided with a medium having a ratio T of less than 80% is used for the zoom optical system.
The above-mentioned 3 characterized by being inserted into the optical path of the system
4. The electronic imaging device according to 4.

【０２０９】〔３７〕 前記複数の開口の中の複数にそ
れぞれ空間周波数特性の異なる光学的ローパスフィルタ
ーを配したことを特徴とする上記３４記載の電子撮像装
置。[37] The electronic image pickup device according to the above item 34, wherein an optical low-pass filter having a different spatial frequency characteristic is arranged in each of the plurality of openings.

【０２１０】〔３８〕 収納時に少なくとも反射光学素
子以外の１枚のレンズをチルト移動させることで撮影時
よりも薄く収納することを特徴とする上記１記載の電子
撮像装置。[38] The electronic image pickup apparatus as described in the above item 1, characterized in that at least one lens other than the reflective optical element is tilted at the time of storage so that the lens is stored thinner than at the time of shooting.

【０２１１】〔３９〕 前記反射光学素子をプリズムに
て構成し、前記プリズムの外殻を固体で形成し、内部を
液体で充填し、前記ズーム光学系の沈胴時に前記液体を
抜くことにより薄く変形させることを特徴とする上記
１、３、４、６の何れか１項記載の電子撮像装置。[39] The reflective optical element is composed of a prism, the outer shell of the prism is formed of a solid, the inside is filled with a liquid, and the liquid is removed when the zoom optical system is collapsed to be thinly deformed. 7. The electronic imaging device according to any one of the above 1, 3, 4, and 6, wherein

【０２１２】〔４０〕 前記第４の反射面により反射さ
れた光束を観察者眼球に導くファインダー光路としたこ
とを特徴とする上記１１記載の電子撮像装置。[40] The electronic image pickup device according to the above item 11, wherein the light flux reflected by the fourth reflecting surface is used as a finder optical path that guides it to an observer's eyeball.

【０２１３】〔４２〕 前記反射光学素子を移動させる
ことで撮影方向を変更可能としたことを特徴とする上記
１、３、４、６、１１の何れか１項記載の電子撮像装
置。[42] The electronic image pickup apparatus described in any one of the above items 1, 3, 4, 6 and 11, wherein the photographing direction can be changed by moving the reflective optical element.

【０２１４】〔４３〕 広角端から望遠端に変倍する際
に物体側にのみ移動する群を少なくとも１つ含み、変倍
時に可動な全ての群の最も物体側のレンズよりも物体側
に入射面・射出面の少なくとも一方が曲率を有する面で
ある光路を折り曲げるための反射光学素子を少なくとも
１つ含む光路折り曲げズーム光学系及びその像側に配置
された電子撮像素子を有することを特徴とする電子撮像
装置。[43] At least one group that moves only to the object side when zooming from the wide-angle end to the telephoto end, and is incident on the object side of the most object-side lens of all the groups that are movable during zooming An optical path bending zoom optical system including at least one reflective optical element for bending an optical path having at least one of a surface and an exit surface having a curvature, and an electronic image pickup device arranged on the image side thereof. Electronic imaging device.

【０２１５】〔４４〕 前記光路を折り曲げるための反
射光学素子が前記光路折り曲げズーム光学系の最も物体
側に配置されていることを特徴とする上記４３記載の電
子撮像装置。[44] The electronic image pickup apparatus according to the above item 43, wherein a reflective optical element for bending the optical path is arranged on the most object side of the optical path bending zoom optical system.

【０２１６】〔４５〕 前記光路を折り曲げるための反
射光学素子は入射面が物体側に凹面を向けていることを
特徴とする上記４３又は４４記載の電子撮像装置。[45] The electronic image pickup device according to the item 43 or 44, wherein the reflecting optical element for bending the optical path has an incident surface which is concave toward the object side.

【０２１７】〔４６〕 前記光路を折り曲げるための反
射光学素子は入射面が非球面であることを特徴とする上
記４５記載の電子撮像装置。[46] The electronic image pickup device according to the above item 45, wherein the reflecting optical element for bending the optical path has an aspherical incident surface.

【０２１８】〔４７〕 前記光路を折り曲げるための反
射光学素子は射出面が平面であることを特徴とする上記
４６記載の電子撮像装置。[47] The electronic image pickup apparatus as described in 46 above, wherein the reflecting optical element for bending the optical path has a flat exit surface.

【０２１９】〔４８〕 前記の広角端から望遠端に変倍
する際に物体側にのみ移動する群は、２つの正レンズと
少なくとも１つの負レンズとからなり、少なくとも１つ
ずつの正レンズと負レンズが互いに接合されていること
を特徴とする上記４３から４７の何れか１項記載の電子
撮像装置。[48] The group which moves only to the object side when zooming from the wide-angle end to the telephoto end is composed of two positive lenses and at least one negative lens, and at least one positive lens. 48. The electronic image pickup device according to any one of 43 to 47, wherein the negative lenses are cemented to each other.

【０２２０】〔４９〕 前記の広角端から望遠端に変倍
する際に物体側にのみ移動する群は、２つの正レンズと
１つの負レンズとからなり、前記負レンズが少なくとも
一方の正レンズと互いに接合されていることを特徴とす
る上記４３から４７の何れか１項記載の電子撮像装置。[49] The group that moves only to the object side when zooming from the wide-angle end to the telephoto end is composed of two positive lenses and one negative lens, and the negative lens is at least one positive lens. 48. The electronic image pickup device according to any one of the items 43 to 47, wherein the electronic image pickup device is joined to the electronic image pickup device.

【０２２１】[0221]

【発明の効果】以上の説明から明らかなように、本発明
により、沈胴厚が薄く、収納性に優れ、かつ、高倍率で
リアフォーカスにおいても結像性能の優れたズームレン
ズを得ることができ、ビデオカメラやデジタルカメラの
徹底的薄型化を図ることが可能となる。As is apparent from the above description, according to the present invention, it is possible to obtain a zoom lens which has a thin collapsible thickness, is excellent in storability, and has a high magnification and excellent imaging performance even in rear focusing. It is possible to make video cameras and digital cameras thinner.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の電子撮像装置に用いられる光路折り曲
げズーム光学系の実施例１の無限遠物点合焦時の望遠端
（ａ）、中間状態（ｂ）、広角端（ｃ）でのレンズ断面
図である。FIG. 1 is a diagram illustrating an optical path bending zoom optical system used in an electronic image pickup apparatus of the present invention at a telephoto end (a), an intermediate state (b), and a wide-angle end (c) when focusing on an object point at infinity. It is a lens sectional view.

【図２】実施例２の光路折り曲げズーム光学系の図１と
同様のレンズ断面図である。2 is a lens cross-sectional view similar to FIG. 1 of an optical path bending zoom optical system of Example 2. FIG.

【図３】実施例３の光路折り曲げズーム光学系の図１と
同様のレンズ断面図である。3 is a lens cross-sectional view similar to FIG. 1 of an optical path bending zoom optical system of Example 3. FIG.

【図４】実施例４の光路折り曲げズーム光学系の図１と
同様のレンズ断面図である。FIG. 4 is a lens cross-sectional view similar to FIG. 1 of an optical path bending zoom optical system of Example 4.

【図５】実施例５の光路折り曲げズーム光学系の図１と
同様のレンズ断面図である。5 is a lens cross-sectional view similar to FIG. 1 of the optical path bending zoom optical system of Example 5. FIG.

【図６】実施例６の光路折り曲げズーム光学系の図１と
同様のレンズ断面図である。6 is a lens cross-sectional view similar to FIG. 1 of the optical path bending zoom optical system of Example 6. FIG.

【図７】実施例７の光路折り曲げズーム光学系の図１と
同様のレンズ断面図である。7 is a lens cross-sectional view similar to FIG. 1 of the optical path bending zoom optical system of Example 7. FIG.

【図８】実施例８の光路折り曲げズーム光学系の図１と
同様のレンズ断面図である。8 is a lens cross-sectional view similar to FIG. 1 of the optical path bending zoom optical system of Example 8. FIG.

【図９】実施例９の光路折り曲げズーム光学系の図１と
同様のレンズ断面図である。9 is a lens cross-sectional view similar to FIG. 1 of the optical path bending zoom optical system of Example 9. FIG.

【図１０】実施例１０の光路折り曲げズーム光学系の図
１と同様のレンズ断面図である。10 is a lens cross-sectional view similar to FIG. 1 of the optical path bending zoom optical system of Example 10. FIG.

【図１１】実施例１１の光路折り曲げズーム光学系の図
１と同様のレンズ断面図である。11 is a lens cross-sectional view similar to FIG. 1 of the optical path bending zoom optical system of Example 11. FIG.

【図１２】実施例１２の光路折り曲げズーム光学系の図
１と同様のレンズ断面図である。12 is a lens cross-sectional view similar to FIG. 1 of the optical path bending zoom optical system of Example 12. FIG.

【図１３】実施例１の無限遠物点合焦時の収差図であ
る。FIG. 13 is an aberration diagram for Example 1 upon focusing on an object point at infinity.

【図１４】実施例１２の無限遠物点合焦時の収差図であ
る。FIG. 14 is an aberration diagram for Example 12 upon focusing on an object point at infinity.

【図１５】本発明の光路折り曲げズーム光学系の沈胴方
式の１例を説明するための図である。FIG. 15 is a diagram for explaining an example of a collapsing method of the optical path bending zoom optical system of the present invention.

【図１６】光路折り曲げ用の反射光学素子をミラーで構
成した場合の１つの沈胴方式の概念図である。FIG. 16 is a conceptual diagram of one collapsing method in the case where the reflective optical element for bending the optical path is composed of a mirror.

【図１７】光路折り曲げ用の反射光学素子をミラーで構
成した場合の別の沈胴方式の概念図である。FIG. 17 is a conceptual diagram of another retractable method in the case where the reflective optical element for bending the optical path is composed of a mirror.

【図１８】光路折り曲げ用の反射光学素子を液体プリズ
ムあるいは変形可能なプリズムで構成した場合の別の沈
胴方式の概念図である。FIG. 18 is a conceptual diagram of another collapsing method when the reflective optical element for bending the optical path is formed of a liquid prism or a deformable prism.

【図１９】光路折り曲げ用の反射光学素子を形状可変ミ
ラーで構成する場合の合焦方式の概念図である。FIG. 19 is a conceptual diagram of a focusing method when a reflective optical element for bending an optical path is configured by a variable shape mirror.

【図２０】形状可変ミラーの面形状を説明するための概
念図である。FIG. 20 is a conceptual diagram for explaining the surface shape of the variable shape mirror.

【図２１】光路折り曲げ用の反射光学素子を形状可変ミ
ラーで構成する場合の手ブレ補正方式の概念図である。FIG. 21 is a conceptual diagram of a camera shake correction method when a reflective optical element for bending an optical path is configured by a variable shape mirror.

【図２２】光路折り曲げズーム光学系からファインダー
光路を分割する構成の概念図である。FIG. 22 is a conceptual diagram of a configuration for dividing the finder optical path from the optical path bending zoom optical system.

【図２３】近赤外シャープカットコートの一例の透過率
特性を示す図である。FIG. 23 is a diagram showing transmittance characteristics of an example of a near infrared sharp cut coat.

【図２４】ローパスフィルターの射出面側に設ける色フ
ィルターの一例の透過率特性を示す図である。FIG. 24 is a diagram showing the transmittance characteristics of an example of a color filter provided on the exit surface side of a low-pass filter.

【図２５】補色モザイクフィルターの色フィルター配置
を示す図である。FIG. 25 is a diagram showing a color filter arrangement of complementary color mosaic filters.

【図２６】補色モザイクフィルターの波長特性の一例を
示す図である。FIG. 26 is a diagram showing an example of wavelength characteristics of a complementary color mosaic filter.

【図２７】各実施例の明るさ絞りの部分の一例の詳細を
示す斜視図である。FIG. 27 is a perspective view showing details of an example of a portion of the aperture stop of each embodiment.

【図２８】各実施例の明るさ絞りの部分の別の例の詳細
を示す図である。FIG. 28 is a diagram illustrating details of another example of the aperture stop portion of each example.

【図２９】本発明による光路折り曲げズーム光学系を組
み込んだデジタルカメラの外観を示す前方斜視図であ
る。FIG. 29 is a front perspective view showing the outer appearance of a digital camera incorporating the optical path bending zoom optical system according to the present invention.

【図３０】図２９のデジタルカメラの後方斜視図であ
る。30 is a rear perspective view of the digital camera shown in FIG. 29. FIG.

【図３１】図２９のデジタルカメラの断面図である。31 is a cross-sectional view of the digital camera shown in FIG.

【図３２】本発明による光路折り曲げズーム光学系を対
物光学系として組み込れたパソコンのカバーを開いた前
方斜視図である。FIG. 32 is a front perspective view of the personal computer in which the optical path bending zoom optical system according to the present invention is incorporated as an objective optical system with the cover open.

【図３３】パソコンの撮影光学系の断面図である。FIG. 33 is a sectional view of a photographing optical system of a personal computer.

【図３４】図３２の状態の側面図である。FIG. 34 is a side view of the state shown in FIG. 32.

【図３５】本発明による光路折り曲げズーム光学系を対
物光学系として組み込れた携帯電話の正面図、側面図、
その撮影光学系の断面図である。FIG. 35 is a front view, a side view, and a side view of a mobile phone in which the optical path bending zoom optical system according to the present invention is incorporated as an objective optical system.
It is a sectional view of the photographing optical system.

【符号の説明】[Explanation of symbols]

Ｇ１…第１群 Ｇ１−１…第１−１群 Ｇ１−２…第１−２群 Ｇ２…第２群 Ｇ３…第３群 Ｇ４…第４群 Ｇ５…第５群 Ｐ…光路折り曲げプリズム Ｓ…開口絞り（独立の場合） ＩＦ…近赤外カットフィルター ＩＣ…近赤外カットコート面 ＬＦ…光学的ローパスフィルター ＣＧ…カバーガラス Ｉ…像面 Ｅ…観察者眼球 Ｌ１…負メニスカスレンズ Ｍ…光路折り曲げ用ミラー Ｌ２、Ｌ３…レンズ ＬＧ…レンズ群 ＬＰ…液体プリズム、変形可能なプリズム ＤＭ…形状可変ミラー Ｍ１…反射光学素子 ＬＡ…レンズ群 Ｍ２…光路分割素子 Ｍ３、Ｍ４…反射面 １Ａ、１Ｂ、１Ｃ、１Ｄ、１Ｅ…開口 １Ａ’、１Ｂ’、１Ｃ’、１Ｄ’、１Ｅ’…開口 １０…ターレット １０’…ターレット １１…回転軸 ４０…デジタルカメラ ４１…撮影光学系 ４２…撮影用光路 ４３…ファインダー光学系 ４４…ファインダー用光路 ４５…シャッター ４６…フラッシュ ４７…液晶表示モニター ４９…ＣＣＤ ５０…カバー部材 ５１…処理手段 ５２…記録手段 ５３…ファインダー用対物光学系 ５５…ポロプリズム ５７…視野枠 ５９…接眼光学系 １１２…対物レンズ １１３…鏡枠 １１４…カバーガラス １６０…撮像ユニット １６２…撮像素子チップ １６６…端子 ３００…パソコン ３０１…キーボード ３０２…モニター ３０３…撮影光学系 ３０４…撮影光路 ３０５…画像 ４００…携帯電話 ４０１…マイク部 ４０２…スピーカ部 ４０３…入力ダイアル ４０４…モニター ４０５…撮影光学系 ４０６…アンテナ ４０７…撮影光路 G1 ... 1st group G1-1 ... Group 1-1 G1-2 ... Group 1-2 G2 ... Second group G3 ... Group 3 G4 ... Group 4 G5 ... Fifth group P ... Optical path bending prism S ... Aperture stop (when independent) IF ... Near infrared cut filter IC: Near infrared cut coat surface LF ... Optical low pass filter CG ... cover glass I ... Image plane E ... Observer eye L1 ... Negative meniscus lens M ... Mirror for bending the optical path L2, L3 ... Lens LG: Lens group LP: Liquid prism, deformable prism DM: Variable shape mirror M1 ... Reflective optical element LA ... Lens group M2 ... Optical path splitting element M3, M4 ... Reflective surface 1A, 1B, 1C, 1D, 1E ... Opening 1A ', 1B', 1C ', 1D', 1E '... Opening 10 ... Turret 10 '... turret 11 ... Rotation axis 40 ... Digital camera 41 ... Shooting optical system 42 ... Optical path for photography 43 ... Finder optical system 44 ... Optical path for finder 45 ... Shutter 46 ... Flash 47 ... LCD monitor 49 ... CCD 50 ... Cover member 51 ... Processing means 52 ... Recording means 53 ... Objective optical system for viewfinder 55 ... Porro prism 57 ... Field of view frame 59 ... Eyepiece optical system 112 ... Objective lens 113 ... Mirror frame 114 ... Cover glass 160 ... Imaging unit 162 ... Image sensor chip 166 ... Terminal 300 ... PC 301 ... Keyboard 302 ... Monitor 303 ... Shooting optical system 304 ... Shooting optical path 305 ... Image 400 ... Mobile phone 401 ... Microphone part 402 ... Speaker unit 403 ... Input dial 404 ... Monitor 405 ... Photography optical system 406 ... Antenna 407 ... Shooting optical path

───────────────────────────────────────────────────── フロントページの続き (72)発明者 榛澤 豊治 東京都渋谷区幡ヶ谷２丁目43番２号 オリ ンパス光学工業株式会社内 (72)発明者 渡邉 正仁 東京都渋谷区幡ヶ谷２丁目43番２号 オリ ンパス光学工業株式会社内 (72)発明者 石井 敦次郎 東京都渋谷区幡ヶ谷２丁目43番２号 オリ ンパス光学工業株式会社内 (72)発明者 武山 哲英 東京都渋谷区幡ヶ谷２丁目43番２号 オリ ンパス光学工業株式会社内 (72)発明者 今村 文美 東京都渋谷区幡ヶ谷２丁目43番２号 オリ ンパス光学工業株式会社内 Ｆターム(参考） 2H087 KA01 LA01 PA07 PA18 PB08 QA03 QA07 QA17 QA21 QA25 QA34 QA42 QA45 RA01 RA41 RA43 SA63 SA64 SA65 SA72 SA76 SB03 SB12 SB24 SB32 SB42 TA01 TA03 2H101 FF00 5C022 AB44 AB55 AB66 AC54    ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toyoji Harusawa             2-43 Hatagaya, Shibuya-ku, Tokyo Ori             Inside Npus Optical Industry Co., Ltd. (72) Inventor Masahito Watanabe             2-43 Hatagaya, Shibuya-ku, Tokyo Ori             Inside Npus Optical Industry Co., Ltd. (72) Inventor Atsujiro Ishii             2-43 Hatagaya, Shibuya-ku, Tokyo Ori             Inside Npus Optical Industry Co., Ltd. (72) Inventor Tetsuhide Takeyama             2-43 Hatagaya, Shibuya-ku, Tokyo Ori             Inside Npus Optical Industry Co., Ltd. (72) Inventor Fumi Imamura             2-43 Hatagaya, Shibuya-ku, Tokyo Ori             Inside Npus Optical Industry Co., Ltd. F term (reference) 2H087 KA01 LA01 PA07 PA18 PB08                       QA03 QA07 QA17 QA21 QA25                       QA34 QA42 QA45 RA01 RA41                       RA43 SA63 SA64 SA65 SA72                       SA76 SB03 SB12 SB24 SB32                       SB42 TA01 TA03                 2H101 FF00                 5C022 AB44 AB55 AB66 AC54

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 広角端から望遠端に変倍する際に物体側
にのみ移動する群を少なくとも１つ含み、変倍時に可動
な全ての群の最も物体側のレンズよりも物体側に光路を
折り曲げるための反射光学素子を少なくとも１つ含む光
路折り曲げズーム光学系及びその像側に配置された電子
撮像素子を有することを特徴とする電子撮像装置。1. At least one group that moves only to the object side when zooming from the wide-angle end to the telephoto end, and has an optical path closer to the object side than the lens closest to the object side in all the groups that are movable during zooming. An electronic image pickup apparatus comprising: an optical path bending zoom optical system including at least one reflecting optical element for bending; and an electronic image pickup element arranged on an image side thereof. 【請求項２】 最も物体側のレンズから前記変倍時に可
動な全ての群の中最も物体側の面の直前までの部分系の
合成焦点距離が負である請求項１記載の電子撮像装置。2. The electronic image pickup apparatus according to claim 1, wherein the combined focal length of the subsystems from the lens closest to the object side to immediately before the surface closest to the object side of all the groups that are movable during zooming is negative. 【請求項３】 物体側より順に、負レンズ群と光路折り
曲げのための反射光学素子とにて構成された第１−１
群、正レンズを１枚含む第１−２群、正の屈折力を有す
る第２群を含み、広角端から望遠端に変倍する際は前記
第２群が物体側にのみ移動する光路折り曲げズーム光学
系及びその像側に配置された電子撮像素子を有すること
を特徴とする電子撮像装置。3. A first-first lens unit which is composed of, in order from the object side, a negative lens group and a reflective optical element for bending an optical path.
An optical path bending in which a second lens group, a first and second lens group including one positive lens, and a second lens group having a positive refractive power are included, and the second lens group moves only to the object side when zooming from the wide-angle end to the telephoto end. An electronic image pickup device comprising a zoom optical system and an electronic image pickup device arranged on the image side thereof. 【請求項４】 物体側より順に、入射面、射出面の少な
くとも一方が凹面である光路折り曲げのための反射光学
素子であるプリズムを含む第１−１群、正レンズを１枚
含む第１−２群、正の屈折力を有する第２群を含み、広
角端から望遠端に変倍する際は前記第２群が物体側へ単
調に移動するような光路折り曲げズーム光学系及びその
像側に配置された電子撮像素子を有することを特徴とす
る電子撮像装置。4. A 1-1 group including a prism which is a reflective optical element for bending an optical path in which at least one of an entrance surface and an exit surface is a concave surface in order from the object side, and a 1-th group including one positive lens. An optical path bending zoom optical system including the second lens group and the second lens group having a positive refractive power so that the second lens group moves monotonically toward the object side when zooming from the wide-angle end to the telephoto end. An electronic image pickup device having an electronic image pickup device arranged. 【請求項５】 前記第２群の像側に正の屈折力を有する
第３群を含み、広角端から望遠端に変倍する際は前記第
２群と第３群が相対的間隔を変えながら移動することを
特徴とする請求項３又は４記載の電子撮像装置。5. A third lens unit having a positive refractive power on the image side of the second lens unit, the relative distance between the second lens unit and the third lens unit changing when zooming from the wide-angle end to the telephoto end. The electronic image pickup apparatus according to claim 3, wherein the electronic image pickup apparatus moves while moving. 【請求項６】 沈胴時に前記反射光学素子を退避し、そ
の空間に前記反射光学素子よりも物体側にある負レンズ
群を収納することを特徴とする請求項３又は４記載の電
子撮像装置。6. The electronic image pickup apparatus according to claim 3, wherein the reflective optical element is retracted when retracted, and a negative lens group on the object side of the reflective optical element is housed in the space. 【請求項７】 物体側より順に、負の第１レンズ群、光
路折り曲げのための反射光学素子、正の第２レンズ群を
有し、沈胴時に前記反射光学素子を退避し、その空間に
前記第１レンズ群を収納する光路折り曲げズーム光学系
及びその像側に配置された電子撮像素子を有することを
特徴とする電子撮像装置。7. A negative first lens group, a reflective optical element for bending an optical path, and a positive second lens group in order from the object side, wherein the reflective optical element is retracted when retracted, and the space is provided with the reflective optical element. An electronic image pickup apparatus comprising: an optical path bending zoom optical system that houses a first lens group; and an electronic image pickup element that is arranged on an image side thereof. 【請求項８】 反射光学素子を含む撮影光学系と電子撮
像素子との間に、前記反射光学素子での反射前後の光軸
を含む平面に対し略垂直の側にも光路を分割する第２の
反射面を設け、その反射側に沿って前記第２の反射面の
法線に対し略直角である法線を有し、かつ、前記第２の
反射面の光軸を含む入射平面と略同一の入射平面を有す
る第３の反射面を設け、さらに、反射後の光路が前記撮
影光学系の入射側の光軸と略平行に射出するように第４
の反射面を設けたことを特徴とする電子撮像装置。8. A second optical path between the photographing optical system including the reflective optical element and the electronic image sensor, the optical path being divided also on a side substantially perpendicular to a plane including an optical axis before and after reflection by the reflective optical element. Is provided, and has a normal line which is substantially perpendicular to the normal line of the second reflection surface along the reflection side thereof, and is substantially an incident plane including the optical axis of the second reflection surface. A third reflecting surface having the same plane of incidence is provided, and further, a fourth reflecting surface is formed so that the optical path after reflection exits substantially parallel to the optical axis on the incident side of the photographing optical system.
An electronic image pickup device characterized in that a reflection surface is provided.
JP2002131458A 2001-05-14 2002-05-07 Electronic imaging device Pending JP2003043354A (en)

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JP2002131458A JP2003043354A (en) 2001-05-14 2002-05-07 Electronic imaging device
EP12153251.9A EP2450731B1 (en) 2002-04-05 2003-03-27 Electronic imaging system comprising a zoom lens
PCT/JP2003/003864 WO2003085438A1 (en) 2002-04-05 2003-03-27 Zoom lens and electronic imaging apparatus using it
EP12153258.4A EP2450732B1 (en) 2002-04-05 2003-03-27 Electronic imaging system comprising a zoom lens
CNB038079542A CN100337140C (en) 2002-04-05 2003-03-27 Zoom lens and electronic imaging apparatus using it
EP12153263.4A EP2450733B1 (en) 2002-04-05 2003-03-27 Electronic imaging system comprising a zoom lens
EP03715536A EP1494053B1 (en) 2002-04-05 2003-03-27 Electronic imaging apparatus with zoom lens

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