JPH04104114A - Variable power lens with short overall length - Google Patents

Variable power lens with short overall length

Info

Publication number
JPH04104114A
JPH04104114A JP2220966A JP22096690A JPH04104114A JP H04104114 A JPH04104114 A JP H04104114A JP 2220966 A JP2220966 A JP 2220966A JP 22096690 A JP22096690 A JP 22096690A JP H04104114 A JPH04104114 A JP H04104114A
Authority
JP
Japan
Prior art keywords
group
lens
variable
object side
image side
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.)
Granted
Application number
JP2220966A
Other languages
Japanese (ja)
Other versions
JP2909765B2 (en
Inventor
Shinichi Mihara
伸一 三原
Tsutomu Uzawa
勉 鵜澤
Atsujirou Ishii
石井 敦次郎
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 JP2220966A priority Critical patent/JP2909765B2/en
Priority to US07/712,980 priority patent/US5189558A/en
Publication of JPH04104114A publication Critical patent/JPH04104114A/en
Application granted granted Critical
Publication of JP2909765B2 publication Critical patent/JP2909765B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00Optical objectives with means for varying the magnification
    • G02B15/14Optical 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
    • G02B15/144Optical 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 four groups only
    • G02B15/1441Optical 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 four groups only the first group being positive
    • G02B15/144113Optical 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 four groups only the first group being positive arranged +-++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To provide a large-diameter variable power lens which is extremely short in overall length, small in front lens diameter, and has small-sized, lightweight, and low-cost constitution and a high power variation rate by composing the lens system of four lens groups and satisfying specific conditions. CONSTITUTION:The lens system consists of the power variation system composed of a 1st group with positive refracting power, a 2nd group with negative refracting power, a 3rd group which has positive refracting power and is invariable fixed, and a 4th group which has positive refracting power and is movable so as to adjust the focus position at the time of power variation, variation in subject distance, etc., in order from the object side. The 3rd group consists of one or two positive lenses and one negative lens which has a large- curvature concave surface on the image side in order from the object side, the 4th group consists of one biconvex lens, and the 3rd or 4th group includes at least one lens with an aspherical surface or is made of a heterogeneous medium. The conditions shown by inequalities I, II, and III are satisfied. Here, fw.fr is the focal lengths of the whole system at its wide-angle end and telephoto end, DII the distance from the most nearest to object side surface peak of the 3rd group to the most nearest to image side surface peak, DIV the thickness of the 4th group, R31 and R36 the radii of curvature of the most nearest to object side surface and most nearest to image side surface of the 3rd group, and N31, N33 the refractive indexes of the most nearest to object side lens and most nearest to image side lens of the 3rd group.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、全長の短い大口径の変倍レンズに関するもの
である。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a large-diameter variable magnification lens with a short overall length.

[従来の技術] 最近、ビデオカメラの小型軽量化、低コスト化の進展は
著しく、カムコーダー市場は大幅に活性化し、一般のユ
ーザーに急速に普及しつつある。
[Prior Art] Recently, video cameras have been significantly reduced in size, weight, and cost, and the camcorder market has been greatly activated and is rapidly becoming popular among general users.

ビデオカメラは、電気回路基板、アクチュエーター系、
光学系からなっており、従来特に電気系を中心に小型、
低コスト化が進められてきたが、最近になって撮像光学
系の大幅な小型化が急進展している。撮像光学系の小型
、低コスト化は、イメージヤ−の小型化技術、回転対称
非球面加工技術、TTL自動合焦検出技術の進展を効果
的に利用した新しいタイプの変倍レンズの開発がなされ
ている。この新しい変倍レンズの一つとして、特開昭6
2−178917号公報、特開平2−39011号公報
、特開平2−53017号公報等に記載されているレン
ズ系のように、正の屈折力を有する第1群と、負の屈折
力を有する第2群とからなる変倍群と、非球面を有する
正の単レンズのみからなり常時固定の第3群と、少なく
とも1枚の負レンズを有し全体として2枚乃至3枚のレ
ンズよりなり変倍時および被写体距離変化等による焦点
位置調節のために可動の第4群ととり構成されたレンズ
系が知られている。このようにコンペンセーターを兼ね
たリアーフォーカスを採用したり非球面を導入すること
によって構成枚数を10枚以下に減らし、それによって
余分なスペースを減らすことが出来るので、前玉径を大
幅に小さ(出来るか全長を短くすることも可能である。
Video cameras are made up of electric circuit boards, actuator systems,
It consists of optical systems, and has traditionally been small-sized, especially electrical systems.
Although efforts have been made to reduce costs, recently there has been rapid progress in significantly downsizing imaging optical systems. In order to reduce the size and cost of imaging optical systems, a new type of variable magnification lens has been developed that effectively utilizes advances in imager miniaturization technology, rotationally symmetric aspheric surface processing technology, and TTL automatic focus detection technology. ing. As one of these new variable magnification lenses,
Like the lens systems described in JP-A No. 2-178917, JP-A-2-39011, JP-A-2-53017, etc., the first group has a positive refractive power and the lens has a negative refractive power. A variable power group consisting of a second group, a permanently fixed third group consisting of only a positive single lens having an aspherical surface, and at least one negative lens, making it a total of two to three lenses. A lens system is known that includes a movable fourth group for adjusting the focus position when changing the magnification and changing the subject distance. In this way, by adopting a rear focus that also serves as a compensator and introducing an aspherical surface, the number of elements in the configuration can be reduced to 10 or less, thereby reducing excess space, and the diameter of the front lens can be significantly reduced ( It is also possible to shorten the overall length if possible.

しかし、上記の従来例よりも更に小型、軽量化すること
への要望が強く特にレンズ系全長の一層短縮が望まれて
いる。
However, there is a strong desire to make the lens system smaller and lighter than the conventional example described above, and in particular, it is desired to further shorten the overall length of the lens system.

[発明が解決しようとする課題] 前述の従来例は、バックフォーカスが必要以上に長くそ
のため全長が十分短くなったとは言い難い。特に第3群
、第4群のレンズ構成を工夫することによって全長を一
層短くする可能性がある。
[Problems to be Solved by the Invention] In the above-mentioned conventional example, the back focus is longer than necessary, so it is difficult to say that the overall length is sufficiently short. In particular, it is possible to further shorten the overall length by devising the lens configurations of the third and fourth groups.

本発明は、以上の点に鑑みなされたもので前述のような
4群構成のレンズ系で、第3群と第4群のレンズ構成を
工夫することによって全長が極めて短く、前玉径が小さ
い小型軽量低コストな高変倍率の大口径変倍レンズを提
供することを目的とするものである。
The present invention has been made in view of the above points, and is a lens system with a four-group configuration as described above, and by devising the lens configuration of the third and fourth groups, the overall length is extremely short and the diameter of the front lens is small. The object of the present invention is to provide a large-diameter variable magnification lens that is small, lightweight, and low-cost and has a high variable magnification ratio.

[課題を解決するための手段] 本発明の変倍レンズは、前記の目的を達成するために、
物体側から順に、正の屈折力を有する第1群と負の屈折
力を有する第2群とよりなる変倍系と、正の屈折力を有
し常時固定の第3群と、正の屈折力を有し変倍時および
被写体距離の変化時の焦点位置調節のために可動の第4
群とより構成され、第3群又は第4群の少なくとも一つ
のレンズに非球面又は不均質媒質を用いたレンズ系で、
第3群を物体側から順に1枚又は2枚の正レンズと像側
に強い凹面を向けた1枚の負レンズとにて構成し、第4
群を1枚の両凸レンズのみにて構成し、更に次の条件(
1)乃至条件(3)を満足するようにしたものである。
[Means for Solving the Problems] In order to achieve the above object, the variable power lens of the present invention has the following features:
In order from the object side, a variable magnification system consisting of a first group having a positive refractive power and a second group having a negative refractive power, a third group having a positive refractive power and always fixed, and a positive refractive power. It has a movable fourth lens for adjusting the focus position when changing the magnification or changing the subject distance.
A lens system consisting of a group and using an aspherical surface or a heterogeneous medium in at least one lens of the third group or the fourth group,
The third group consists of one or two positive lenses and one negative lens with a strongly concave surface facing the image side, in order from the object side, and the fourth group
The group is composed of only one biconvex lens, and the following conditions (
It is designed to satisfy conditions (1) to (3).

(1)  o、t<n、+/(tNs、−1)FLFC
)<z、。
(1) o, t<n, +/(tNs, -1) FLFC
)<z,.

+2)  −1,6<R16/(tl−Nll)n)<
−0,2+31 0.3< (DI+DW)/ff下r
<1.sただしfw、 f□は広角端および望遠端にお
ける全系の焦点距離、 Rm+、Rssは夫々第3群の
最も物体側の面および最も像側の面の曲率半径、N31
+Ns3は夫々第3群の最も物体側のレンズおよび最も
像側のレンズの屈折率、D、は第3群の最も物体側の面
から最も像側の面までの距離、D■は第4群の肉厚であ
る。
+2) -1,6<R16/(tl-Nll)n)<
-0,2+31 0.3< (DI+DW)/ff lower r
<1. s, where fw, f□ is the focal length of the entire system at the wide-angle end and telephoto end, Rm+, Rss are the radii of curvature of the surface closest to the object side and the surface closest to the image side of the third group, respectively, N31
+Ns3 is the refractive index of the lens closest to the object side and the lens closest to the image side of the third group, D is the distance from the surface closest to the object side to the surface closest to the image side of the third group, D is the fourth group It is thick.

本発明のレンズ系のレンズ構成上の特徴は、従来例に比
べて、第3群にてかなり光束を収斂させ光束径を小さく
してからほぼアフォーカルに射出し、これを第4群に入
射させるようにしたため第4群の焦点距離を短く出来、
バックフォーカスを短くすることが出来、これによって
レンズ系の全長を短くし得るようにした。つまり第3群
、第4群を上記のようにして両群のトータルの全長を短
くし全系の全長を短くし得るようにした。このように第
3群に入射する発散光束を急速に収斂させるためには、
第3群の最も物体側の面に強い収斂作用を持たせねばな
らない。
The lens structure of the lens system of the present invention is characterized in that, compared to conventional examples, the third group converges the light beam considerably, reduces the diameter of the light beam, and then emits it almost afocal, which then enters the fourth group. This allows the focal length of the fourth group to be shortened.
The back focus can be shortened, which allows the overall length of the lens system to be shortened. In other words, the third and fourth groups are configured as described above to shorten the total length of both groups, thereby shortening the total length of the entire system. In order to rapidly converge the divergent light beam entering the third group in this way,
The surface of the third group closest to the object must have a strong convergence effect.

上記の理由から第3群の最も物体側の面のパワーを規定
したのが条件(1)である。
For the above reason, condition (1) defines the power of the surface of the third group closest to the object side.

この条件(1)の上限を越えて前記の面のパワーが弱く
なりすぎると第3群で十分に光束を収斂させることが出
来ず、レンズ系の全長を短くすることが出来ない。また
条件(1)の下限を越えて前記の面のパワーが強くなり
すぎると非球面や不均質媒質を用いても球面収差やコマ
収差を良好に補正することが困難になる。
If the power of the above-mentioned surface becomes too weak by exceeding the upper limit of this condition (1), the third group will not be able to sufficiently converge the light beam, and the total length of the lens system will not be shortened. Furthermore, if the power of the surface becomes too strong exceeding the lower limit of condition (1), it becomes difficult to satisfactorily correct spherical aberration and coma aberration even if an aspherical surface or a non-uniform medium is used.

第3群内で急速に収斂させた光束をほぼアフォーカルに
て射出させ第4群に入射するようにしないと、第4群に
て焦点調節を行なった時球面収差ゃコマ収差の変動が大
きくなりすぎるので好ましくない。このようにほぼアフ
ォーカルにて射出するようにするためには、第3群内で
は十分に光束を収束する必要があり強い発散力を持たせ
る面は最も像側の面にしなiすればならない。
Unless the light beam that is rapidly converged in the third group exits almost afocal and enters the fourth group, the spherical aberration and comatic aberration will fluctuate greatly when the focus is adjusted in the fourth group. I don't like it because it's too much. In order to make the light emit almost afocal like this, it is necessary to sufficiently converge the luminous flux within the third group, and the surface that has a strong diverging force must be the surface closest to the image side. .

条件(2)は、この第3群の最も像側の面のパワーを規
定したものである。この条件(2)の上限を越えてこの
面のパワーが強くなりすぎると第3群より射出する光束
が発散光になり、第4群による焦点調節により球面収差
、コマ収差の変動が太き(なりやすいばかりか、バック
フォーカスが長くなり全長が長くなる。又下限を越え前
記の面のパワーが弱くなりすぎると第3群により急速に
収斂させた光束をほぼアフォーカルにて射出させること
が出来なくなり、焦点調節による球面収差、コマ収差の
変動が大きくなり好ましくない。
Condition (2) defines the power of the surface of the third group closest to the image side. If the upper limit of condition (2) is exceeded and the power of this surface becomes too strong, the light beam emerging from the third group becomes a divergent light, and the fluctuations in spherical aberration and coma aberration become large due to focus adjustment by the fourth group ( Not only is this easy to happen, but the back focus becomes longer and the overall length becomes longer.Furthermore, if the lower limit is exceeded and the power of the above-mentioned surface becomes too weak, the light beam rapidly converged by the third group cannot be emitted almost afocal. As a result, fluctuations in spherical aberration and comatic aberration due to focus adjustment become large, which is undesirable.

なお、第3群の面Rst、R*aが非球面の場合や最も
物体側、最も像側のレンズが不均質媒質の場合は、条件
fil 、 (21のRx+、Ria、Nst、Nas
の値は、光軸近傍の値を用いる。
Note that when the surfaces Rst and R*a of the third group are aspherical surfaces, or when the lenses closest to the object side and closest to the image side are inhomogeneous media, the conditions fil, (21 Rx+, Ria, Nst, Nas
The value near the optical axis is used as the value.

以上のように条件fil 、 (2)が満足され゛れば
、バックフォーカスを短くしつつ性能を良好にし得る。
As described above, if condition fil, (2) is satisfied, the back focus can be shortened and the performance can be improved.

しかしバックフォーカスを短くしても、レンズ群の総厚
が無意味に厚いとレンズ系の全長を短くする効果が半減
することになる。第3群の総厚が大であれば、条件(1
1、+21を満足しなくともバックフォーカスを短くす
ることは可能であるか、全長は短くならない。つまり条
件fl) 、 +21 を満足することにより第3群の
総厚を薄くし、しかもバックフォーカスを短(すること
が出来る。
However, even if the back focus is shortened, if the total thickness of the lens group is pointlessly thick, the effect of shortening the total length of the lens system will be halved. If the total thickness of the third group is large, then the condition (1
1. Is it possible to shorten the back focus even if +21 is not satisfied, or the total length will not be shortened. In other words, by satisfying the conditions fl) and +21, it is possible to reduce the total thickness of the third group and shorten the back focus.

同様に第4群も極力薄くすることが望ましい。Similarly, it is desirable to make the fourth group as thin as possible.

そのために条件(3)にて第3群と第4群との厚みの総
和を規定した。条件(3)の上限を越えると、バックフ
ォーカスを短く出来ても全長を短くしにくい。又条件(
3)の下限を越えると、正レンズの練肉の確保が難しく
なるので好ましくない。
For this purpose, the total thickness of the third group and the fourth group was defined in condition (3). If the upper limit of condition (3) is exceeded, it is difficult to shorten the overall length even if the back focus can be shortened. Also, the condition (
If the lower limit of 3) is exceeded, it becomes difficult to secure the dough for the positive lens, which is not preferable.

以上述べたようにして極めて全長の短い変倍レンズを得
ることが出来るが、さらに全長を短くするためには、次
の条件(4) 、 (5)を満足することが好ましい。
As described above, a variable power lens with an extremely short overall length can be obtained, but in order to further shorten the overall length, it is preferable to satisfy the following conditions (4) and (5).

f4)  1.0XIO−”<DT/fT”<7.0X
10−”!53  0.9<f、/fW  <3.5た
だしDlは望遠端で無限連合焦時の第3群と第4群の間
隔、f、は第4群の焦点距離である。
f4) 1.0XIO-"<DT/fT"<7.0X
10-''!53 0.9<f, /fW<3.5 where Dl is the distance between the third and fourth groups at the telephoto end and infinite joint focus, and f is the focal length of the fourth group.

条件(4)は、第3群と第4群の間隔を規定したもので
ある。本発明の目的からすると上2の間隔は極力小さい
値の方がよいが、フォーカシングのためのスペースとし
て必要十分量確保しなければならない。
Condition (4) defines the distance between the third group and the fourth group. From the purpose of the present invention, it is better to have the upper two distances as small as possible, but it is necessary to ensure a sufficient amount of space for focusing.

第3群からの射出光がアフォーカルであると仮定すると
、ある被写体距離に対する第4群の繰出し量Δは次のよ
うに与えられる。
Assuming that the light emitted from the third group is afocal, the amount of extension Δ of the fourth group for a certain subject distance is given as follows.

Δ=a・β21+11 −L” ただしaは定数、β1■は第1群、第2群、第3群のト
ータルの倍率である。
Δ=a·β21+11 −L” where a is a constant and β1■ is the total magnification of the first, second, and third groups.

繰出量Δは全系の焦点距離で決まるので望遠端の焦点距
離が長い程多くのス、ベースを要する。
The amount of extension Δ is determined by the focal length of the entire system, so the longer the focal length at the telephoto end, the more bases are required.

条件(4)の上限を越えるとより近距離にフォーカシン
グ出来るので好ましいが、至近距離性能やスペースのこ
とを考慮すると好ましくない。又下限を越えるとフォー
カシングのためのスペースは節約出来るが近距鮪へのフ
ォーカシングがしにくくなる。
Exceeding the upper limit of condition (4) is preferable because it allows focusing at a closer distance, but it is not preferable in consideration of close-range performance and space. If the lower limit is exceeded, the space for focusing can be saved, but it becomes difficult to focus on close-range tuna.

条件(5)は、第4群の焦点距離を規定したものである
。β1■・f4は全系の焦点距離であるので、繰出量Δ
は、f4には依存しない。又f、は短い程バックフォー
カスが短くなるためf4は極力短い方が好ましい、しか
しf4があまり短いと第4群と像面との間にフィルター
類を配置するためのスペースがなくなる。条件(5)の
上限を越えるとバックフォーカスが長くなりやすく、又
下限を越えると、フィルター類を配置するスペースが少
なくなる。
Condition (5) defines the focal length of the fourth group. Since β1■・f4 is the focal length of the entire system, the amount of extension Δ
does not depend on f4. Also, the shorter f is, the shorter the back focus is, so it is preferable for f4 to be as short as possible.However, if f4 is too short, there will be no space for arranging filters between the fourth group and the image plane. When the upper limit of condition (5) is exceeded, the back focus tends to become long, and when the lower limit is exceeded, the space for arranging filters becomes less.

次に性能面も考慮して一層良好な変倍レンズを得るため
には、下記の条件(6) 、 (7) 、 (81を満
足することが好ましい。
Next, in order to obtain an even better variable power lens in consideration of performance, it is preferable to satisfy the following conditions (6), (7), and (81).

(61−0,9< (RII+R8□)/fRs+−n
sz) <−o、1(710,3<(Rss+Rza)
/(Rss−Rss) < 2.3f83  0.6 
<R41/R36<  2.4ただしLl+R1mは夫
々第3群の最も物体側のレンズの物体側および像側の面
の曲率半径、RM B 4Rssは夫々第3群の最も像
側のレンズの物体側および像側の面の曲率半径、R4□
は第4群の最も物体側の面の曲率半径である。
(61-0,9< (RII+R8□)/fRs+-n
sz) <-o, 1(710, 3<(Rss+Rza)
/(Rss-Rss) < 2.3f83 0.6
<R41/R36< 2.4 However, Ll+R1m is the radius of curvature of the object side and image side surfaces of the lens closest to the object in the third group, respectively, and RM B 4Rss is the radius of curvature of the lens closest to the image side in the third group, respectively. and the radius of curvature of the image side surface, R4□
is the radius of curvature of the surface of the fourth group closest to the object.

条件(5)は、第3群の最も物体側の正レンズのシェー
ブファクターを規定したものである。この条件の下限を
越えると球面収差の補正がしにくくなり又上限を越える
とレンズ系の小型化を達成しにくくなる。
Condition (5) defines the shave factor of the positive lens closest to the object in the third group. If the lower limit of this condition is exceeded, it becomes difficult to correct spherical aberration, and if the upper limit is exceeded, it becomes difficult to achieve miniaturization of the lens system.

条件(7)は、第3群の最も像側の負レンズのシェーブ
ファクターを規定したものである。この条件の下限を越
えるとレンズ系の小型化を達成しに(くなり上限を越え
ると球面収差を補正しにくくなる。
Condition (7) defines the shave factor of the negative lens closest to the image side of the third group. If the lower limit of this condition is exceeded, it becomes difficult to achieve miniaturization of the lens system, and if the upper limit is exceeded, it becomes difficult to correct spherical aberration.

条件(8)は、第3群の最も像側の面の曲率半径!’l
ssと第4群の最も物体側の面の曲率半径R41との比
を規定したものである。第3群と第4群との間隔は可変
であるが、はぼアフォーカルであるために球面収差の変
動は少ない。しかしアフォーカル度は焦点距離によって
変動するので、フォーカシング時の球面収差の変動をよ
り少なくするためには、R36とR41の値は極力近い
方がよい0条件(8)の上限、下限のいずれより外れて
も球面収差のばか非点収差の変動が大きくなる。
Condition (8) is the radius of curvature of the surface closest to the image side of the third group! 'l
This defines the ratio between ss and the radius of curvature R41 of the surface of the fourth group closest to the object. Although the distance between the third and fourth groups is variable, since they are afocal, there is little variation in spherical aberration. However, since the degree of afocalness changes depending on the focal length, in order to further reduce the fluctuation of spherical aberration during focusing, the values of R36 and R41 should be as close as possible to the upper or lower limit of the 0 condition (8). Even if it is off, fluctuations in spherical aberration and astigmatism will increase.

尚、上記の各条件に関しても非球面又は不均質媒質の場
合は、光軸近傍の値を用いることとする。
Regarding each of the above conditions, in the case of an aspherical surface or a non-uniform medium, values near the optical axis are used.

[実施例] 次に本発明の全長の短い変倍レンズの各実施例を示す。[Example] Next, embodiments of the variable power lens having a short overall length according to the present invention will be described.

実施例1 f : 6.900〜38.11100 、 F/1.
45〜F72.232ω= 49.0@ん9.2’ r l= 46.6262 d、” 1.100On、= 1.84666   v
、 = 23.78ra=21.8337 dz= 4.6000   nt” 1.60311 
  V2= 60.70ra = −53,5341 d、= 0.1500 r4= 14.4337 d4= 2.900On3:1.60311   v、
 = 60.70ra” 33.8040 d5=D、(可変) r、= −152,2103 d6= 0.9000    j14= 1.6968
0    v、= 55.52ry” 6.5436 dy=2.30口O r、=−9,8267 da” 0.8000    ns= 1.60311
    v、= 60.70rs=8.4818 ds= 1.9000  1a= 1.84666  
  Vs= 23.78r、。 = 45.4524 d+a=Di(可変) rt、 =oo (絞り) d、、= 1.7000 rlx =IO,0679(非球面) d+□= 3.6000   fi、: 1.5891
3    v、= 60.97r、、  =−62,2
959 d+a=0.1500 rt4 =8.9432 d+、= 4.000On、= 1.72000   
  v、= 50.25r、s  =−71,7917 d、、= 0.1500 r、6 =−202,7666 d、6= 0.800On、= 1.80518   
 v、 = 25.43rtt  == 5.4043 d+t=Ds(可変) r、、 =7.7606 (非球面) d+s= 3.3000   nzo  = 1.58
913  νro= 60.97r+9 =−41,3
529 d+e=04(可変) r、O==QQ dga=6.000Onz  =1.51633   
シ、、= 64.15r、、:QQ 非球面係数 (第12面) P  = 1.0000  、  A、  =−0,1
5714x 1O−3A、= −0,18163x 1
0−’ 、 A、 = 0.703,81 x 10−
1′(第18面) P = 1.0000 、 A、 =−0,22486
X 10−”As=−0,50608xlO−’ 、 
A、 =0.27776 xlO−’f    ’  
6.900  16.362  38.800D+  
   0.900  6.827  11.236D2
  11.636  5.708   1.300D、
    4.465  2.700  5.987D4
   3.521   5.287   2.000全
長(広角端) 、、、52.959 、  前玉有効径
= 21.0Rx+/l1)0.3<R31/{(N3
1−1)、r九τG) = 1.044R,、/(11
−N、、)ffτf、) = −0−410(D厘+D
y)/−/−f、=τ−f−;−= 0.733DT/
f、”= 3.977 X 10−”  、  f4I
/fW= 1.649(Rs++Rstl/(Rst−
Rsgl  =−0,722fRss”RsaJ/ (
Rss−Rssl = 0.948R−+/Raa =
 1.436実施例2 f = 6.900〜38.799 、 F/1.44
〜F/2.172ω=49.0@〜9.2” r + = 33.6905 d、−1,200On、= 1.84666   v、
= 23.78r2= 20.4286 d2= 4.4000   fi、= 1.60311
   vz= 60.70r、=−283,3472 d、=0.1500 r4= 20.9192 d−= 3.1000    na= 1.60311
     ν8= 60.70rs” 70.1720 a5=n+(可変) re= 107.1270 da” 0.8000     n4= 1.8061
0      v−= 40.95r7=5.7148 d、= 2.2000 rs= −8−3221 dll= 0.7000   05= 1.60738
     vs= 56.81re==7.8205 da” 2.1000    na= 1.84666
     vs” 23.78r1a  ”−126,
6923 d+o=Dx(可変) r、、  =OO(絞り) d、、= 1.5000 r1□=9.2402 (非球面) d1z= 3.800On−= 1.58913   
  v7= 6[1,97rls  =−62,760
5 d+a= 0.1500 r+4 =9.0124 d、、=4.1(100n、=1.58913    
 シ、=60.97rt6  =−69,0295 d、5= o、1500 r+s  =26.1836 d、6= 0.8000   1’l、= 1.846
66      v*= 23.78rtt  = 5
.1686 d+t=Dm(可変) r+s =6.7364 (非球面)′d、、=4.0
000    n、、  =1.48749  v、。
Example 1 f: 6.900 to 38.11100, F/1.
45~F72.232ω = [email protected]' r l = 46.6262 d," 1.100On, = 1.84666 v
, = 23.78ra=21.8337 dz= 4.6000 nt” 1.60311
V2 = 60.70ra = -53,5341 d, = 0.1500 r4 = 14.4337 d4 = 2.900On3:1.60311 v,
= 60.70ra" 33.8040 d5=D, (variable) r, = -152,2103 d6= 0.9000 j14= 1.6968
0 v, = 55.52ry" 6.5436 dy = 2.30 mouths Or, = -9,8267 da" 0.8000 ns = 1.60311
v, = 60.70rs = 8.4818 ds = 1.9000 1a = 1.84666
Vs=23.78r,. = 45.4524 d+a=Di (variable) rt, =oo (aperture) d,, = 1.7000 rlx =IO, 0679 (aspherical surface) d+□= 3.6000 fi,: 1.5891
3 v, = 60.97r,, =-62,2
959 d+a=0.1500 rt4 =8.9432 d+,=4.000On,=1.72000
v, = 50.25r, s = -71,7917 d,, = 0.1500 r, 6 = -202,7666 d, 6 = 0.800On, = 1.80518
v, = 25.43rtt == 5.4043 d+t=Ds (variable) r,, =7.7606 (aspherical surface) d+s= 3.3000 nzo = 1.58
913 νro= 60.97r+9 =-41,3
529 d+e=04 (variable) r, O==QQ dga=6.000Onz =1.51633
C, , = 64.15r, , :QQ Aspheric coefficient (12th surface) P = 1.0000, A, =-0,1
5714x 1O-3A, = -0,18163x 1
0-', A, = 0.703,81 x 10-
1' (18th surface) P = 1.0000, A, = -0,22486
X10-"As=-0,50608xlO-',
A, =0.27776 xlO−'f'
6.900 16.362 38.800D+
0.900 6.827 11.236D2
11.636 5.708 1.300D,
4.465 2.700 5.987D4
3.521 5.287 2.000 Overall length (wide-angle end) ,,,52.959 , Front lens effective diameter = 21.0Rx+/l1) 0.3<R31/{(N3
1-1), r9τG) = 1.044R,, /(11
−N,,)ffτf,) = −0−410(D+D
y)/-/-f, = τ-f-;-= 0.733DT/
f, "= 3.977 X 10-", f4I
/fW= 1.649(Rs++Rstl/(Rst-
Rsgl = -0,722fRss”RsaJ/ (
Rss-Rssl = 0.948R-+/Raa =
1.436 Example 2 f = 6.900-38.799, F/1.44
~F/2.172ω=49.0@~9.2" r + = 33.6905 d, -1,200On, = 1.84666 v,
= 23.78r2= 20.4286 d2= 4.4000 fi, = 1.60311
vz = 60.70r, = -283,3472 d, = 0.1500 r4 = 20.9192 d- = 3.1000 na = 1.60311
ν8= 60.70rs" 70.1720 a5=n+(variable) re= 107.1270 da" 0.8000 n4= 1.8061
0 v-=40.95r7=5.7148 d,=2.2000 rs=-8-3221 dll=0.7000 05=1.60738
vs= 56.81re==7.8205 da” 2.1000 na= 1.84666
vs"23.78r1a"-126,
6923 d+o=Dx (variable) r,, =OO (aperture) d,, = 1.5000 r1□=9.2402 (aspherical surface) d1z= 3.800On-= 1.58913
v7=6[1,97rls=-62,760
5 d+a=0.1500 r+4 =9.0124 d,,=4.1(100n,=1.58913
si, = 60.97 rt6 = -69,0295 d, 5 = o, 1500 r+s = 26.1836 d, 6 = 0.8000 1'l, = 1.846
66 v*= 23.78rtt = 5
.. 1686 d+t=Dm (variable) r+s =6.7364 (aspherical surface)'d,,=4.0
000 n,, =1.48749 v,.

=70.2Orts+  =−21,1553 dlQ”D4(可変) rzo::00 d、、=6.000o    n、、  =1.516
33  シ、、=64.15r21 = ■ 非球面係数 (第12面) P = 1.0000 、 A4=−0,25905x
 10−”A、=−0,23436x 10−’  、
  Aa  =0.62261  x 10−’(第1
8面) P  = 1.0000  、  A、  =−0,3
9540xlO−”A、=−D、69335x 10−
’  、  八、  =−0,11826x toづf
     6.900  16−362  38.79
9D、    0.600  9.340  15.2
58D、    8.329   3.958   1
.[100Da    4.044  2.500  
5.508D、    3.464  5.008  
2.[100全長(広角端) =49.669 、  
前玉有効径= 21.7’+/((Nst−1)r了w
]7)’= 0.959Rss/((t−NasLI]
−ゴ〒) = −0,373(Dm”Dlyl /J−
r;丁f、  =0.794DT/f?”= 3.65
9 X 10−”  、  f、 /f、= 1.59
4(Rat”Rsa)/(Rat−Rsal =−0,
743(Rzs+Ra5l/ (Ras〜Rsa) =
1.492R,、/R,、=1.303 実施例3 f =6.900〜38.800 、 F/1.44〜
F/2.042ω=49.0″〜9.2’ r、= 41.7937 d1= 1.20[10n、: 1.84666   
  V、= 23.78r2= 22.8622 d2= 4.1000     n2= 1.6031
1      v2= 60.70ra”−118,8
556 da”0.2000 r4= 19.1412 d4= 3.000On−= 1.60311    
17.= 60.70rs” 73.3694 d5=D1(可変) rs=80.3217 d6= 0.900ロ    n、= 1.69680
     v4=55.52ry=7.7697 d、= 2.8000 re”−11,2903 da= 0.8000    n5= 1.60311
     v5= 60.70r9= 10.5774 d9= 2.0000    j16= 1.8466
6     ve= 23.78rlo  =37.1
339 a、o=O,(可変) r、1=oo(絞り) d、、= 1.7000 r+2= 7.9500 (非球面) d、□=4.600ロ    n、= 1.69680
      v7= 55.52r+s  =−30,
1367 d、3= 0.2000 r、、  = 29.2800 d+−= 3.7303    n−= 1.8466
6     va= 23.78r+s  =6.07
92 d+5=Dx(可変) r、6=7.5823 (非球面) d、、= 3.100On−= 1.60311   
  ve= 60.7Or、、  =−32,4893 d17=D4(可変) r18 =■ d、6=6.000o    nro  = 1.51
633  1J+−o= 64.45r19 :l 非球面係数 (第12面) P = 1.0000 、 A4=−0,25835X
 10−”A、= −0,30075x 10−’  
、  A、= −0,32127x 10−’(第16
面) P = 1.0000  、  A4 =−0,368
53x 10−”A、=0.74935  x 10−
’  、  Aa  =−0,52612x 1O−6
f      6.900  16.362  38.
800D、     0.600   7.480  
12.823D、    13.523   6.64
4   1.300D、     3.589   2
.200   5.481D、     3.892 
  5.281   2.000全長(広角端) =5
4.023 、  前玉有効径= 21.5R,、/(
fNa、−t17F了7]])= 0.697R、、/
 (I t −N 、 、 ) n7五l = −o 
、 439(Dm+Dw) /n7π= 0.711D
、/fT”= 3.641 X 10弓 、  f、/
f、=1.522(Rx++Rs□l/(R8ビR3□
l  =−0,583(Rs5+Rial/(Ri5−
R361=1.524R4,/R,、=1.247 実施例4 f=6.9Do〜38.800 、 F/2.06〜F
/2.052ω=49.0’〜9.2” r、= 49.0000 d、= 1.2000   旧= 1.84666  
 シ、=23.78rg=24.6210 d2” 4.1000   112: 1.60311
     V2= 60.70rs=−87,7864 d、= 0.2000 r4= 17.6736 d、” 3.2000    ns= 1.60311
     v、= 60.70r6= 58.6771 d5=D、(可変) rs = 151.1492 d、= 0.9000    n4= 1.69680
     v、= 55.52ry=7.1029 d、= 2.6500 ra=−11,0922 d−= 0.8000    ns= 1.60311
     v−=’60.70r@ = 10.265
7 d−= 1.8000    ns= 1.84666
     v6= 23.78r1o  =94.47
42 d+o=Dz(可変) r、、  =CX) (絞り) d+ 、= 1.7000 r1□: 6.3725 (非球面) d、2=3.rpoo   nt=1.69680  
 1/、=55.52r+s  ”−50,1345 d1s=o、1500 r+4 =27.9103 d14= 2.742I    ns= 1.8466
6     v8= 23.78r+s  ”5.01
77 d、5=O3(可変) r、l1=7.8414 (非球面) d、、= 3.4000    1]、= 1.603
11      v9= 60.70r+t  =−2
2,6625 dl、=D4(可変) r+a  = (資) d、、”6.0000    neo  =1.516
33   シ、、=64.15rI9 :o。
=70.2Orts+ =-21,1553 dlQ"D4 (variable) rzo::00 d,, =6.000on,, =1.516
33 C,, =64.15r21 = ■ Aspheric coefficient (12th surface) P = 1.0000, A4 = -0,25905x
10-"A, =-0,23436x 10-',
Aa = 0.62261 x 10-' (first
8th side) P = 1.0000, A, = -0,3
9540xlO-”A, =-D, 69335x 10-
', 8, =-0,11826x todf
6.900 16-362 38.79
9D, 0.600 9.340 15.2
58D, 8.329 3.958 1
.. [100Da 4.044 2.500
5.508D, 3.464 5.008
2. [100 total length (wide-angle end) = 49.669,
Front element effective diameter = 21.7'+/((Nst-1)r completed w
]7)'=0.959Rss/((t-NasLI]
-Go〒) = -0,373(Dm"Dlyl/J-
r; dingf, =0.794DT/f? ”= 3.65
9 X 10-”, f, /f, = 1.59
4(Rat"Rsa)/(Rat-Rsal=-0,
743(Rzs+Ra5l/(Ras~Rsa) =
1.492R,, /R,, = 1.303 Example 3 f = 6.900~38.800, F/1.44~
F/2.042ω=49.0″~9.2′ r,=41.7937 d1=1.20[10n,: 1.84666
V, = 23.78r2 = 22.8622 d2 = 4.1000 n2 = 1.6031
1 v2 = 60.70ra”-118,8
556 da"0.2000 r4= 19.1412 d4= 3.000On-= 1.60311
17. = 60.70rs" 73.3694 d5 = D1 (variable) rs = 80.3217 d6 = 0.900 ro n, = 1.69680
v4=55.52ry=7.7697 d, = 2.8000 re”-11,2903 da= 0.8000 n5= 1.60311
v5= 60.70r9= 10.5774 d9= 2.0000 j16= 1.8466
6ve=23.78rlo=37.1
339 a, o=O, (variable) r, 1=oo (aperture) d,, = 1.7000 r+2= 7.9500 (aspherical surface) d, □ = 4.600 ro n, = 1.69680
v7=55.52r+s=-30,
1367 d, 3= 0.2000 r,, = 29.2800 d+-= 3.7303 n-= 1.8466
6 va=23.78r+s=6.07
92 d+5=Dx (variable) r, 6=7.5823 (aspherical surface) d,, = 3.100On-= 1.60311
ve=60.7Or,, =-32,4893 d17=D4 (variable) r18=■ d,6=6.000o nro=1.51
633 1J+-o= 64.45r19 :l Aspheric coefficient (12th surface) P = 1.0000, A4=-0,25835X
10-"A, = -0,30075x 10-'
, A, = -0,32127x 10-' (16th
surface) P = 1.0000, A4 = -0,368
53x 10-”A, = 0.74935 x 10-
', Aa = -0,52612x 1O-6
f 6.900 16.362 38.
800D, 0.600 7.480
12.823D, 13.523 6.64
4 1.300D, 3.589 2
.. 200 5.481D, 3.892
5.281 2.000 Total length (wide-angle end) = 5
4.023, Front lens effective diameter = 21.5R, / (
fNa, -t17F7]])=0.697R,,/
(It −N, , ) n75l = −o
, 439(Dm+Dw) /n7π= 0.711D
,/fT"= 3.641 X 10 bows, f,/
f, =1.522(Rx++Rs□l/(R8BiR3□
l =-0,583(Rs5+Rial/(Ri5-
R361=1.524R4,/R,,=1.247 Example 4 f=6.9Do~38.800, F/2.06~F
/2.052ω=49.0'~9.2" r, = 49.0000 d, = 1.2000 old = 1.84666
shi, =23.78rg=24.6210 d2" 4.1000 112: 1.60311
V2 = 60.70rs = -87,7864 d, = 0.2000 r4 = 17.6736 d," 3.2000 ns = 1.60311
v, = 60.70r6 = 58.6771 d5 = D, (variable) rs = 151.1492 d, = 0.9000 n4 = 1.69680
v, = 55.52ry = 7.1029 d, = 2.6500 ra = -11,0922 d- = 0.8000 ns = 1.60311
v-='60.70r@=10.265
7 d-= 1.8000 ns= 1.84666
v6=23.78r1o=94.47
42 d+o=Dz (variable) r,, =CX) (aperture) d+, = 1.7000 r1□: 6.3725 (aspherical surface) d, 2=3. rpoo nt=1.69680
1/, =55.52r+s ”-50,1345 d1s=o, 1500 r+4 =27.9103 d14= 2.742I ns= 1.8466
6 v8= 23.78r+s ”5.01
77 d, 5=O3 (variable) r, l1=7.8414 (aspherical surface) d,, = 3.4000 1], = 1.603
11 v9=60.70r+t=-2
2,6625 dl, = D4 (variable) r+a = (capital) d,,”6.0000 neo =1.516
33 shi,,=64.15rI9:o.

非球面係数 C第12面) P = 1.0000 、 A4=−0,36365x
 10〜3As= −0,66028x 10−& 、
  A、=−0,14291x lo−6(第16面) P = 1.0000  、A、= −0,27343
x 1O−3A6=−0,85428x 10−’  
、   A、= 0.23185  x 10−’f 
     6.900  16.362  38.80
0D、     0.700   7.606  13
.000Dz    13.600  6.694  
 1.300D3   3.885   2.800 
  6.580D4   4.694   5.780
   2.000全長(広角端) =52.959 、
  前玉有効径= 21.4R,、/((N3.−11
7rTJ17) = 0.559n、a/((l−N3
s17rTJ17) = −0,362fDw”D*l
 / 7rf917= 0.577D、/f、”=4.
371 Xl0−”  、  f4/f、=1.461
(Ri + +R3□)/(Ra+−R3z) ”−0
,774(Ra5”Raa)/ fRas−Rial 
= 1.438R4□/R,、=1.563 実施例5 f = 6.900〜38.800 、 F/1.41
.−F/1.992ω=49.0”〜9,2゜ r、= 43.0767 d、= 1.2000    n、= 1.80518
     v1= 25.43rg=19.5560 d2=4.2000    j12= 1.6(131
1ν2= 60.70r3=−60(1,3543 d、= 0.1500 r4== 20.8028 d4=3.3000   113= 1.65844 
    vs= 50.86rS= 127.7478 dS=O+(可変) ra” 40.8164 da= 0.800On−= 1.69680    
 V4= 55.52r7= 6.1997 d、= 2.3000 r8=−8,3248 d−= 0.700On−= 1.60311    
 νg= 60.70rs=8.9835 d、= 2.000On、= 1.84666    
 v、= 23.78r、、  = 86.3663 d、o=l]、 (可変) r、、  =OO(絞り) d、、= 1.5000 r、2=8.2684 (非球面) d、、=4.6000    n7=1.58913 
    v、=60.97rla  =−15,651
4 d、、= 0.1500 rt4 =54.7313 d、4= 5.0896    n、= 1.8466
6     v、= 23.78r、、  ニア、82
85 d、5=D、 (可変) r+s =7.0945 (非球面) d+6= 4.000On−= 1.48749   
 v9= 71)、2Or、、  =−11,6664 d+7=D<(可変) r18 =(1) d+a=6.000On、o  =1.51633  
 シ、、=64.15r1g : oO 非球面係数 (第12面) P = 1.0000 、 A4=−0,40016x
 10−”A、=−0,17286x  to−5、A
、  = −0,37067x 1O−7(第16面) P = 1.0000  、  A、  =−0,69
721x 10−”A6=−0,33798x 10−
5 、A@ = −[1,37651x 10−’f 
    6.900  16.362  38.800
D、    0.600  9.406  15.23
0D、    8.315  3.911   ]、、
000D、    3.459  2400  5.9
59D、    4.501  5.459  2.0
00全長(広角端) =50.953 、  前玉有効
径= 21.OR,、/(fN、ビ1)Wft)=0.
858R3s/ (fl −N’j 、 )4) = 
−ロ、565(D厘+I)vl /J−了;:]−こ 
= 0.846D、/f、2= 3.958 X 10
−”  、  f、、/f、= 1.410fRx++
R32)/ fRa+−Rszl  = −〇、3o9
(Ri5+Rxa)/fRi5−Rial =1.33
4R4+/Rss = 0.906 実施例6 f =6.900〜3g、801 、 F/2.05〜
F72.312ω=49.0”〜926 r、= 45.0881 d、= 1.2000    n1= 1.846F1
6     v、= 23.78rz= 24.455
3 dz= 4.000o    n、= 1.60311
      v2= 60.70rs=−107,41
35 d、=0.1500 r4= 18.5213 d−” 3−200On−= 1.60311    
 vx= 60.70rs” 53.3680 d、=[l、(可変) r8= 134.7229 ds” 0.8000    n4= 1.80100
     v<= 34.97rア: 5.5979 d、= 1.8000 re =−8,5882 d、= 0.700On、= 1.60311    
 v5= 60.7Or、=7.5579 d、” 2.0000    na= 1.84666
    1/6= 23.78r、、  =−102,
2128 d、。=D2(可変) r、、’=OO(絞り) d+ 、= 1.5000 r1□= 6.2817 (非球面) d、2=3.700On、=1.48749     
v7=70.2Or、、  =−14,3111 d、3= 0.1500 r、4 = 21.9781 d+4= 4.8468    jl、= 1.846
66     シー= 23.78r+s  =5.6
367 d+5=Da(可変) r+s =6.8129 (非球面) d1s= 4.3[100ns= 1.48749  
    v−= 70.2Oray  =−12,52
14 dlff”D−(可変) r、8 :OO d、、=6.000On、o =1.51633  V
、。=64.15r】9 : (資) 非球面係数 (第12面) P = 1.0000 、 A、 =−0,74041
x 10弓A、=−0,58991xlO−’  、 
 A、  =−0,23369xlO−’(第16面) P = 1.0000  、  A、  =−0,53
942x 10−”A、=−0,15165xlO−’
  、   A、=0.35044  xlO−’f 
     6.900  16.362  38.8D
ID、     0.600   9.258  15
.286D、     8.343   4.013 
  1.000D、     3.839   2.5
00   5.856D4   41口17   5.
356   2.000全長(広角端) =49.23
6 、  前玉有効径= 21.5R3,/((N、、
−11,70石)=0.788R,、/((t−N、、
LQ”;ftl = −0,407fDa÷Dlv)/
J7r;7丁?=0.794DT/fT”= 3.89
0 X 10−”  、  f、 /f、= 1.41
5fRx、+R−z)/ (Rs+−R3□l  =−
0,390(Rss+R55l/ (Rss−Rssl
 = 1.690R,、/R3,=1.209 実施例7 f=6.700〜50.440 、 F/1.44〜F
/2.112ω=5(1,4°〜7.2’ r、= 53.9356 d+= t、5ooo    n、= 1.84666
     シ、= 23.78r2= 28.6454 d*= 4.800[1n、= 1.56873   
  v2= 63.16r3=−103,6510 d、、= 0.1500 r4= 20.9530 d4= 3.4500    n、= 1.60311
     y3= 60.70r、= 55.3350 d、=D、(可変) r、= 35.1277 d、=1.10DOn< = 1.69680    
  v4= 55.52rア= 7.6963 (ly=2.9000 ra=−9,8110 d−=1.0000   115= 1.60311 
    vs=60.70rs= 12.3932 d、=2.0000     jl、= 1.8466
6      シロ= 23.78r、。 = 99.
8484 dl。=D2(可変) r、、  =OO(絞り) d1+ = 1.5000 rl2=13.9316  (非球面)d1a= 3.
5000    n、= 1.69680     シ
、= 55.52rts  =−51,9617 d+a= 0.2000 r、4 = 11.2530 d、4”2.500On、=1.60311     
ν、”60.7Or、r、 = 30.6895 d、5= 0.6200 rla  =−192,3609 d+1!= 1.210On−= 1.84666  
   ve= 23.78r+7 =11.1804 d1□=D3(可変) rlg = 12.3060 (非球面)d+s” 3
.3000   n+o = 1.56873  ν+
o= 63.16rle  ”−20,0283 d、、=04(可変) rho  =■ d、、=1.0O00n、、  =1.51633  
V、、=64.15rat  = ■ d2.= 0.7000 r2□ =00 dzz= 5.860On1i  = 1.54771
  v−2= 62.83ris :00 d、s= 1.2100 r24 = ■ d、4=0.600On、、  =1.48749  
シ、、=70.20rzs  ” ■ 非球面係数 (第12面) P =0.5388 、 A、 =−0,10978x
lO−’As= −0,481Hlx 10−’(第1
8面) P = 0.6118 、 A4=−0,22709X
 10−”A、= 0.40034 x 1O−7f 
  6.700 18.383 50.440D、  
 0.700 10.815 18.0750、 18
.875 8.760 1.500D、   4.81
2 2.591 6.626D、    3.503 
  5.724   1.690全長(広角端) =6
4.957 、  前玉有効径=24.3Rx+/((
Ns+−1)r了;’TT;) = t 、 ossR
sa/((1−Nsi)、「6=石1 = −0,71
8(Dw+D*l /J−Ti= 0.616Dr/f
−2=2.604 X 10−”  、  f4/f−
= 2.077(Ra++Razl/(Rs+−Rag
)  =−0,577(Rss+Ra5l/ (R−−
−R−61= 0.890R4+/Rsa =j、ID
] 実施例8 f=6.700〜50.440 、 F/1.43〜F
/2.262ω=50.4°〜7.2゜ rl = 48.9885 d1= 1.500o   n、= 1.84666 
  V1= 23.78rz=24.8892 di= 4.5000   nz= 1.60311 
  V2= 60.7Or= = −377、4066 d3= o、 1500 r4= 23.4540 d、= 3.400On、 = IJ3854   v
、 = 55.38r5= 100.3216 d5=D、(可変) r、= 104.0635 d、= 1.1000    n4= 1.69680
     v4= 55.52r7=7.2555 d、= 2.6000 r8= −9,8423 d、= 1.000On、: 1.H311v5= 6
0.701”9= 10.3952 d、= 2.000On、= 1.84666    
 シロ= 23.78r+o 〜95.3109 d+o=Dz(可変′) r、、  =OO(絞り) d、、= 1.5000 r、□= 11.7960  (非球面)d1g= 4
.0000    n−= 1.60311     
V?= 60.70rla  =−33,4377 d、3= 0.2000 r、、  = 11.0871 d、= 2.650On−= 1.56873    
v−= 63.16r、5 ” 33.0044 d、5= 0.3500 r+6〜106.7443 d、6= 0.900ロ    ne= 1.8466
6      ν9= 23.78ray  =lO,
3881 d+y=Dx(可変) r+a == 13.2932(非球面)d+a= 3
.100On+o  = 1.56873 1)+o=
 63.16r、、  =−19,6489 d+e=n4(可変) r20 :■ d、、”1.000On、、  〜1.51633  
 シz=64.15r2.=OO d2.= 0.7000 r22 :o。
Aspheric coefficient C 12th surface) P = 1.0000, A4 = -0,36365x
10~3As=-0,66028x 10-&,
A, = -0,14291x lo-6 (16th surface) P = 1.0000, A, = -0,27343
x 1O-3A6=-0,85428x 10-'
, A, = 0.23185 x 10-'f
6.900 16.362 38.80
0D, 0.700 7.606 13
.. 000Dz 13.600 6.694
1.300D3 3.885 2.800
6.580D4 4.694 5.780
2.000 total length (wide-angle end) = 52.959,
Front lens effective diameter = 21.4R, / ((N3.-11
7rTJ17) = 0.559n, a/((l-N3
s17rTJ17) = −0,362fDw”D*l
/7rf917=0.577D,/f,”=4.
371 Xl0-", f4/f, = 1.461
(Ri + +R3□)/(Ra+-R3z) ”-0
,774(Ra5”Raa)/fRas-Rial
= 1.438R4□/R,, = 1.563 Example 5 f = 6.900 to 38.800, F/1.41
.. -F/1.992ω=49.0”~9.2°r, = 43.0767 d, = 1.2000 n, = 1.80518
v1= 25.43rg=19.5560 d2=4.2000 j12= 1.6(131
1ν2 = 60.70r3 = -60 (1,3543 d, = 0.1500 r4 = = 20.8028 d4 = 3.3000 113 = 1.65844
vs= 50.86rS= 127.7478 dS=O+(variable) ra" 40.8164 da= 0.800On-= 1.69680
V4 = 55.52r7 = 6.1997 d, = 2.3000 r8 = -8,3248 d- = 0.700On- = 1.60311
νg=60.70rs=8.9835 d,=2.000On,=1.84666
v, = 23.78r,, = 86.3663 d, o=l], (variable) r,, =OO (aperture) d,, = 1.5000 r, 2 = 8.2684 (aspherical surface) d, ,=4.6000 n7=1.58913
v, = 60.97 rla = -15,651
4 d,, = 0.1500 rt4 = 54.7313 d, 4 = 5.0896 n, = 1.8466
6 v, = 23.78r,, near, 82
85 d, 5=D, (variable) r+s = 7.0945 (aspherical surface) d+6= 4.000On-= 1.48749
v9=71), 2Or,, =-11,6664 d+7=D<(variable) r18 =(1) d+a=6.000On, o =1.51633
C,, =64.15r1g: oO Aspheric coefficient (12th surface) P = 1.0000, A4 = -0,40016x
10-”A, =-0,17286x to-5,A
, = -0,37067x 1O-7 (16th surface) P = 1.0000, A, = -0,69
721x 10-”A6=-0,33798x 10-
5, A@ = -[1,37651x 10-'f
6.900 16.362 38.800
D, 0.600 9.406 15.23
0D, 8.315 3.911 ],,
000D, 3.459 2400 5.9
59D, 4.501 5.459 2.0
00 Overall length (wide-angle end) = 50.953, Front lens effective diameter = 21. OR,,/(fN, Bi1)Wft)=0.
858R3s/ (fl −N'j , )4) =
-Ro, 565 (Drin+I)vl /J-了;:]-ko
= 0.846D, /f, 2 = 3.958 x 10
−” , f, , /f, = 1.410fRx++
R32)/fRa+-Rszl = -〇, 3o9
(Ri5+Rxa)/fRi5-Rial =1.33
4R4+/Rss = 0.906 Example 6 f = 6.900~3g, 801, F/2.05~
F72.312ω=49.0”~926 r, = 45.0881 d, = 1.2000 n1 = 1.846F1
6 v, = 23.78 rz = 24.455
3 dz = 4.000on, = 1.60311
v2= 60.70rs=-107,41
35 d, = 0.1500 r4 = 18.5213 d-” 3-200On- = 1.60311
vx= 60.70rs" 53.3680 d, = [l, (variable) r8= 134.7229 ds" 0.8000 n4= 1.80100
v<= 34.97 r a: 5.5979 d, = 1.8000 re = -8,5882 d, = 0.700 On, = 1.60311
v5 = 60.7Or, = 7.5579 d,” 2.0000 na = 1.84666
1/6=23.78r,, =-102,
2128 d. = D2 (variable) r,,' = OO (aperture) d+ , = 1.5000 r1□ = 6.2817 (aspherical surface) d, 2 = 3.700 On, = 1.48749
v7=70.2Or,, =-14,3111 d, 3=0.1500 r, 4=21.9781 d+4=4.8468 jl,=1.846
66 sea=23.78r+s=5.6
367 d+5=Da (variable) r+s =6.8129 (aspherical surface) d1s= 4.3 [100ns= 1.48749
v-=70.2Oray=-12,52
14 dlff"D- (variable) r, 8: OO d,, = 6.000 On, o = 1.51633 V
,. =64.15r]9: (Capital) Aspheric coefficient (12th surface) P = 1.0000, A, = -0,74041
x 10 bow A, = -0,58991xlO-',
A, =-0,23369xlO-' (16th surface) P = 1.0000, A, =-0,53
942x 10-”A, =-0,15165xlO-'
, A, = 0.35044 xlO-'f
6.900 16.362 38.8D
ID, 0.600 9.258 15
.. 286D, 8.343 4.013
1.000D, 3.839 2.5
00 5.856D4 41 mouths 17 5.
356 2.000 Overall length (wide-angle end) = 49.23
6. Front lens effective diameter = 21.5R3,/((N,,
-11,70 stones)=0.788R,,/((t-N,,
LQ"; ftl = -0,407fDa÷Dlv)/
J7r; 7 guns? =0.794DT/fT”=3.89
0 x 10-”, f, /f, = 1.41
5fRx, +R-z)/ (Rs+-R3□l =-
0,390 (Rss+R55l/ (Rss-Rssl
= 1.690R, /R3, = 1.209 Example 7 f=6.700~50.440, F/1.44~F
/2.112ω=5(1,4°~7.2' r, = 53.9356 d+=t, 5ooo n, = 1.84666
shi, = 23.78r2= 28.6454 d*= 4.800[1n, = 1.56873
v2= 63.16r3=-103,6510 d,, = 0.1500 r4= 20.9530 d4= 3.4500 n, = 1.60311
y3 = 60.70r, = 55.3350 d, =D, (variable) r, = 35.1277 d, = 1.10DOn< = 1.69680
v4= 55.52r a= 7.6963 (ly=2.9000 ra=-9,8110 d-=1.0000 115= 1.60311
vs=60.70rs=12.3932 d,=2.0000 jl,=1.8466
6 Shiro = 23.78r,. =99.
8484 dl. =D2 (variable) r,, =OO (aperture) d1+ = 1.5000 rl2=13.9316 (aspherical surface) d1a= 3.
5000 n, = 1.69680 ci, = 55.52 rts = -51,9617 d+a = 0.2000 r, 4 = 11.2530 d, 4"2.500 On, = 1.60311
ν,”60.7Or,r,=30.6895 d,5=0.6200 rla=-192,3609 d+1!=1.210On-=1.84666
ve= 23.78r+7 =11.1804 d1□=D3 (variable) rlg = 12.3060 (aspherical surface) d+s" 3
.. 3000 n+o = 1.56873 ν+
o=63.16rle''-20,0283 d,, =04 (variable) rho =■ d,, =1.0O00n,, =1.51633
V,,=64.15rat=■d2. = 0.7000 r2□ =00 dzz= 5.860On1i = 1.54771
v-2=62.83ris :00 d,s=1.2100 r24= ■ d,4=0.600On,, =1.48749
C, , =70.20rzs” ■ Aspheric coefficient (12th surface) P =0.5388, A, =-0,10978x
lO-'As=-0,481Hlx 10-'(1st
8 sides) P = 0.6118, A4 = -0,22709X
10-”A, = 0.40034 x 1O-7f
6.700 18.383 50.440D,
0.700 10.815 18.0750, 18
.. 875 8.760 1.500D, 4.81
2 2.591 6.626D, 3.503
5.724 1.690 Overall length (wide-angle end) = 6
4.957, front lens effective diameter = 24.3Rx +/((
Ns + - 1) r completion;'TT;) = t, ossR
sa/((1-Nsi), ``6 = stone 1 = -0,71
8(Dw+D*l/J-Ti=0.616Dr/f
−2=2.604×10−”, f4/f−
= 2.077(Ra++Razl/(Rs+-Rag
) =-0,577(Rss+Ra5l/(R--
-R-61=0.890R4+/Rsa=j, ID
] Example 8 f=6.700~50.440, F/1.43~F
/2.262ω=50.4°~7.2°rl = 48.9885 d1= 1.500on, = 1.84666
V1= 23.78rz=24.8892 di= 4.5000 nz= 1.60311
V2= 60.7Or= = -377, 4066 d3= o, 1500 r4= 23.4540 d, = 3.400On, = IJ3854 v
, = 55.38r5 = 100.3216 d5 = D, (variable) r, = 104.0635 d, = 1.1000 n4 = 1.69680
v4=55.52r7=7.2555 d,=2.6000 r8=-9,8423 d,=1.000On,: 1. H311v5=6
0.701”9 = 10.3952 d, = 2.000On, = 1.84666
White = 23.78r+o ~95.3109 d+o=Dz (variable') r,, =OO (aperture) d,, = 1.5000 r, □ = 11.7960 (aspherical surface) d1g = 4
.. 0000 n-= 1.60311
V? = 60.70 rla = -33,4377 d, 3 = 0.2000 r,, = 11.0871 d, = 2.650 On- = 1.56873
v-=63.16r, 5'' 33.0044 d, 5=0.3500 r+6~106.7443 d, 6=0.900ro ne=1.8466
6 ν9=23.78ray=lO,
3881 d+y=Dx (variable) r+a == 13.2932 (aspherical surface) d+a= 3
.. 100On+o = 1.56873 1)+o=
63.16r,, =-19,6489 d+e=n4 (variable) r20: ■ d,,”1.000On,, ~1.51633
sz=64.15r2. =OO d2. = 0.7000 r22 :o.

d、。”5.860On、、  〜1.54771  
 V、、〜62.83r23 :o。
d. ”5.860On,, ~1.54771
V,,~62.83r23:o.

d、、= 1.2100 r24:QQ d24=0.600On、、  ”1.48749  
v、、=70.20r2. =■ 非球面係数 (第12面) P=1.口000  、  A、  =−0,1043
0X 10−”A、=−0,49710xlO−’ 、
  A、〜0.20608 xlO−’(第18面) 
 − P = 1.0000 、 A、 = −0,2037
6x 10−”A、=−0,22521xlO−’ 、
  A、〜0.29150 xlO−’f   6.7
00 18.383 50.440D、   0.80
0 11.933 19.316Di  lj、844
 6.422 1.500D、   4.760 2.
510 6.762D、   3.609 5.858
 1.606全長(広角端) 〜59.299 、  
前玉有効径=24.6R3,/((Ns、−t17rう
C)= 1.064Ra−/((1−N−−1−、r几
τIT)=−0,667(Dm”D■l /−’T;−
了7−ミ0.609Dr/fT”= 2.658 x 
10−”  、  f4/f、= 2.154(Rs+
+Rsx)/ (Rsr−Rs□l  =−0,478
(Ras+Rsal/ (Rs%−R,、l 〜1.2
16R4+/Rss  〜1.280 実施例9 f=6.700〜50.440 、 F/1.45〜F
72.292ω=50.4”〜7.2’ r、 = 55.4246 a、〜1.400On、〜1.84666   シ、=
23.78ra=27.2103 d*= 5−200On、= 1.56873   ν
2 = 63.16rs=−87,4611 aa = 0.1500 r4= 20.1075 d4= 3.3000     jl、= 1.603
11      v−= 60.70r5= 55.4
501 dS=c++(可変) r6= 46.3576 d、= 0.900On、= 1.60311   v
4= 60.70rt=7.6705 d、= 3.3000 rs = −10,4549 d、” 0.9000   Q5= 1.60311 
  v5= 60.70re=9.6357 d−” 2.4000     ns= 1.8051
8      ν5=25.43r+ o = 44.
8278 d+o=Dz(可変) r1□ =oo(絞り) d1□= 1.5000 r、、  〜10.5254 d+z= 5.5403   nt (屈折率分布型レ
ンズ1)rlg =−122,1190 d+−〜0.2000 r+4=57.2174 d+4= 1.2363   ns (屈折率分布型レ
ンズ2)rls 〜10.9471 d+5=Ds(可変) rls 〜16.3464 d、、= 3.6384  19 (屈折率分布型レン
ズ3)r、、 =−38,6328 d17=D4(可変) rIII : cl。
d,,= 1.2100 r24:QQ d24=0.600On,, ”1.48749
v, ,=70.20r2. =■ Aspheric coefficient (12th surface) P=1. Mouth 000, A, =-0,1043
0X 10-"A, = -0,49710xlO-',
A, ~0.20608 xlO-' (18th side)
- P = 1.0000, A, = -0,2037
6x 10-"A, = -0,22521xlO-',
A, ~0.29150 xlO-'f 6.7
00 18.383 50.440D, 0.80
0 11.933 19.316 Di lj, 844
6.422 1.500D, 4.760 2.
510 6.762D, 3.609 5.858
1.606 total length (wide-angle end) ~59.299,
Front lens effective diameter = 24.6R3, / ((Ns, -t17rUC) = 1.064Ra-/((1-N--1-, r τIT) = -0,667(Dm"D■l /-'T;-
7-mi 0.609Dr/fT”= 2.658 x
10-”, f4/f, = 2.154 (Rs+
+Rsx)/(Rsr-Rs□l =-0,478
(Ras+Rsal/ (Rs%-R,,l ~1.2
16R4+/Rss ~1.280 Example 9 f=6.700~50.440, F/1.45~F
72.292ω=50.4”~7.2' r, = 55.4246 a, ~1.400On, ~1.84666 shi, =
23.78ra=27.2103 d*= 5-200On, = 1.56873 ν
2 = 63.16rs = -87,4611 aa = 0.1500 r4 = 20.1075 d4 = 3.3000 jl, = 1.603
11 v-=60.70r5=55.4
501 dS=c++ (variable) r6= 46.3576 d, = 0.900On, = 1.60311 v
4 = 60.70rt = 7.6705 d, = 3.3000 rs = -10,4549 d,” 0.9000 Q5 = 1.60311
v5= 60.70re=***7 d-” 2.4000 ns= 1.8051
8 ν5=25.43r+o=44.
8278 d+o=Dz (variable) r1□ =oo (aperture) d1□=1.5000 r,, ~10.5254 d+z=5.5403 nt (gradient index lens 1) rlg =-122,1190 d+-~ 0.2000 r+4=57.2174 d+4=1.2363 ns (Refractive index distribution lens 2) rls ~10.9471 d+5=Ds (variable) rls ~16.3464 d,, = 3.6384 19 (Refractive index distribution type lens 3) r,, = -38,6328 d17 = D4 (variable) rIII: cl.

d、、”5.8600   n、、 〜1.54771
  シ、、=62.83r19 =■ d、、、= 1.2100 r20 :■ dza=0.600o    n++  〜1.487
49   シ1l=70.20r2■ =■ 屈折率分布型レンズ1 波長   N。     N。
d,,”5.8600 n,, ~1.54771
,,=62.83r19 =■ d,,,= 1.2100 r20:■ dza=0.600on++ ~1.487
49 Shi1l=70.20r2■ =■ Gradient index lens 1 Wavelength N. N.

587.56 1.60311 −0.96088x 
10−3656.2111 1.60008 −0.8
6366XIO−”486.13 1.61002 −
[1,862DIX10−”波長    N2 587.56  0.13611xl(1−’656.
28  0.15883x 10−’486、13  
0.17095x 10−’屈折率分布型レンズ2 波長   N。     N1 587.56 1.68893 −0.44201X 
10−”656.28 1.68248 −0.518
24X 10−”486.13   1.70465 
  −0.52764xlロー2波長    N2 5g7.56   0.62536x 10−’656
.28    0.73930x 10−’486.1
3    0.77591xlO−’屈折率分布型レン
ズ3 波長   N。     Nt 587.56 1.60311 −0.18390xl
O−2656,281,60008−0,17437x
 10−”486.13 1.61002 −0.16
776x 10−”波長    N2 587、56 −0.19369 x 10−’656
.28 −0.29650x 10−’486.13 
−0.55626x 10−’f   6.700 1
8.383 50.440D、   0.700 10
.328 17.2770、 18.077 8.44
9 1.500D、   4.538 2.475 7
.063D、   4.787 6.849 2.26
2全長(広角端) 〜64.965 、  前玉有効径
=25.5Rat/((N、m、−1)fLTr)= 
0.949Rss/((1−Nus)−fLTr、)=
−0,864(Dm”1llvl/Jf、−f、  〜
0.579Dr/fi”〜2.776  xlO−’ 
 、   f−/fW”2.342(RsuRs□l/
 (Rs+−Razl  =−0,841(Rss+R
iel/ (Rss−Rial  = 1.473R4
+/Rss  = 1.493 実施例10 f=6.700〜50,440 、 F/1.45〜F
72.302ω= 50.4”〜7.2’ r+=56.9259 d1= 1.4000   fi、= 1.84666
   vr= 23.78rt = 27.5385 d、〜5.1000   n2=1.56873   
v2=63.16rs = −87,4998 d、= 0.150O r4= 20.8150 d4= 3.300On−= 1.60311   v
s= 60.70rs = 63.8668 ds=Dt(可変) r、= 91.6022 ds= 0.9000   n4= 1.60311 
  ν4= 60.70r−= 7.8421 dア= 3.2000 r8=−10,9528 du = 0.8000   n5= 1.60311
    v5= 60.70re=9.7328 de=2.4000    n6= 1.80518 
     vs= 25.43r1゜= 57.952
6 dl。=D、(可変) r11=■(絞り) d1+= 1−5000 r、、  = 10.6401 d1□= 7.2176   n−(屈折率分布型レン
ズ)r、、 =−34,2560 d、3= 0.2000 r14 =−866,5188 d、4” 0.9000   ns= 1.84666
   ys= 23.78r Is = 12.400
1 d+a=Ds(可変) rlg =11.5959  (非球面)d、、 = 
4.0000   n、” 1.48749   v、
= 70.20r+t  =−18,0077 d+t=04(可変) r18 = (3) d、、=5.8600    n+o  =1.547
71  シ、、=62.83r19 =■ d、、= 1.2100 r20 :o。
587.56 1.60311 -0.96088x
10-3656.2111 1.60008 -0.8
6366XIO-”486.13 1.61002-
[1,862DIX10-'' Wavelength N2 587.56 0.13611xl (1-'656.
28 0.15883x 10-'486, 13
0.17095x 10-' Gradient Index Lens 2 Wavelength N. N1 587.56 1.68893 -0.44201X
10-”656.28 1.68248 -0.518
24X 10-”486.13 1.70465
-0.52764xl Low 2 wavelength N2 5g7.56 0.62536x 10-'656
.. 28 0.73930x 10-'486.1
3 0.77591xlO-' Gradient index lens 3 Wavelength N. Nt 587.56 1.60311 -0.18390xl
O-2656,281,60008-0,17437x
10-”486.13 1.61002 -0.16
776x 10-' Wavelength N2 587, 56 -0.19369 x 10-'656
.. 28 -0.29650x 10-'486.13
-0.55626x 10-'f 6.700 1
8.383 50.440D, 0.700 10
.. 328 17.2770, 18.077 8.44
9 1.500D, 4.538 2.475 7
.. 063D, 4.787 6.849 2.26
2 Overall length (wide-angle end) ~64.965, Front lens effective diameter = 25.5 Rat/((N, m, -1) fLTr) =
0.949Rss/((1-Nus)-fLTr,)=
-0,864(Dm"1llvl/Jf, -f, ~
0.579 Dr/fi"~2.776 xlO-'
, f-/fW”2.342 (RsuRs□l/
(Rs+-Razl =-0,841(Rss+R
iel/ (Rss-Rial = 1.473R4
+/Rss = 1.493 Example 10 f=6.700~50,440, F/1.45~F
72.302ω = 50.4"~7.2' r+ = 56.9259 d1 = 1.4000 fi, = 1.84666
vr = 23.78rt = 27.5385 d, ~5.1000 n2 = 1.56873
v2 = 63.16rs = -87,4998 d, = 0.150O r4 = 20.8150 d4 = 3.300On- = 1.60311 v
s = 60.70rs = 63.8668 ds = Dt (variable) r, = 91.6022 ds = 0.9000 n4 = 1.60311
ν4= 60.70r-= 7.8421 da= 3.2000 r8=-10,9528 du= 0.8000 n5= 1.60311
v5= 60.70re=9.7328 de=2.4000 n6= 1.80518
vs= 25.43r1゜= 57.952
6 dl. =D, (variable) r11=■ (aperture) d1+= 1-5000 r,, = 10.6401 d1□= 7.2176 n- (gradient index lens) r,, =-34,2560 d, 3 = 0.2000 r14 = -866,5188 d, 4" 0.9000 ns = 1.84666
ys = 23.78r Is = 12.400
1 d+a=Ds (variable) rlg =11.5959 (aspherical surface) d,, =
4.0000 n,” 1.48749 v,
= 70.20r+t =-18,0077 d+t=04 (variable) r18 = (3) d,, =5.8600 n+o =1.547
71 ci,,=62.83r19=■d,,=1.2100 r20:o.

d、、=0.600On、、=1.48749  v、
、=70.20r2.=o。
d,,=0.600On,,=1.48749v,
,=70.20r2. = o.

非球面係数 P = 1.0000 、 A、 =−0,19046
x 10弓A、=−0,61255xlO−’  、 
  A、=0.85120 X  10−’屈折率分布
型レンズ 波長    N。     N。
Aspheric coefficient P = 1.0000, A, = -0,19046
x 10 bow A, = -0,61255xlO-',
A, = 0.85120 x 10-' gradient index lens wavelength N. N.

587.56 1.60311 −0.18280 x
lO−”656.28 1.60008 −0.181
74 xlO−2486,131,61002−0,1
8543xlO−”波長     N2 587.56 −0.1475?5 xlO−’656
.28 −0.16875 xlO−’486.13 
  −0.13249  xlO−’f     6.
700  18.383  50.440D、    
 0.700  10.587  17.4220、 
  18.222  8.335   1.500D、
     4.424   2.405   7.03
2D、    4.870  6.889   2.2
62全長(広角端) =64.956 、  前玉有効
径=25.OR,+/((Ns+−t)4rnτG)=
o、i。
587.56 1.60311 -0.18280 x
lO-”656.28 1.60008 -0.181
74 xlO-2486,131,61002-0,1
8543xlO-' Wavelength N2 587.56 -0.1475?5 xlO-'656
.. 28 -0.16875 xlO-'486.13
-0.13249 xlO-'f 6.
700 18.383 50.440D,
0.700 10.587 17.4220,
18.222 8.335 1.500D,
4.424 2.405 7.03
2D, 4.870 6.889 2.2
62 Overall length (wide-angle end) = 64.956, Front lens effective diameter = 25. OR, +/((Ns+-t)4rnτG)=
o,i.

Rsa/(tl−N*、l、rnτ’f’;)=−0,
797(Dm”Dwl /4r67G== 0.670
DT/fT”= 2.764 X 10−”  、  
f、 /f、= 2.260(R□十R3□)/(R,
l−R,□) =−[1,526[R,、÷R3B)/
fR,l−R,、) =0.972R,、/R,、=0
.935 実施例11 f=6.900〜3δ、800 、 F/1.44〜F
72.082ω=49.0”ん9.2’ r、 = 48.3921 d+=1.100ロ    il、= 1.34666
      シ、= 23.78rz= 22.602
9 dz= 4.4000    nt= 1.60311
     vz= 60.70rs”−88,9707 ds= 0.1500 r4= 16.1314 d4= 3.3000    il、= 1.6968
0     v−= 55.52rs=48.9345 a5=O+(可変) rs=175.6903 ds= 0.9000    n4= 1.83400
     v4= 37.16rt=6.1347 dy=2.6000 rs=−8,6183 da= 0.8000    jl、= 1.6031
1     vs= 60.70re” 9.2778 d−= 2.3000     ns= 1.8466
6      vs=23.78rho  =−114
,7736 dl。=D2(可変) rlr = 11.4364  (非球面)d++= 
 3−6000      n7=  1.58913
       νt=  60.97r+*  =−3
1,1462 d、2−4.9(10[1 r、3=OO(絞り) d、、= 0.1500 r14  =9.6567 d、4=3.20DOj18= 1.72000   
   v、= 50.25r、v、 =−151,58
57 d+s=0.1500 r、、  = 106.9332 d+a= 0.8000    n、= 1.8466
6     v、= 23.78rat  〜6.23
25 d+y=Ds(可変) r+a 〜8.0472 (非球面) d、、= 3.300ロ    n、。 = 1.58
913   v、、= 60.97r+*  =−38
,5309 d+e=04(可変) r20 :oO dio=6.(1000n、、  〜1.51633 
 v、、〜64.15r、、:00 非球面係数 (第11面) P  〜1.DOOO、A4 = −〇、15016x
 IQ−3A、=−0,17588x 10−’  、
  A、  =D、21506  x  1O−7(第
18面) P = 1.0000  、  A、  =−0,11
98[1x 10−”A6=−D、12802X10−
’  、All 〜0.31248  x 10−’f
      6.900  16.326  38.8
00D、    0.900  7.000  11.
465D、    11.165   5.066  
 0.600D、    4.332  2.500 
 5.803D4   3.470   5.303 
 2.000全長(広角端) 〜52.955 、  
前玉有効径= 21.2Rat/((Nat−1)7r
67石)= 1.186Ri6/((1−N、、lJ二
151τ)=−0,450(D璽+DW)、#T;−τ
−r=0.822DT/fT″= 3.855 X 1
0−”  、  f4 /f、= 1.682(R3,
÷Raa)/ fR3+−R−a) = −0,463
[R3s+Ra5)/ (Rag−Ra6) = 1.
124R,、/R,、〜1.291 実施例12 f = 6.700〜50.44  、 F/1.44
〜F72.112ω= 50.4@  〜7.2” r+= 55.1109 d、 = 1.3000   n、 = 1.8466
6    v、 = 23.78rz=28.8970 d、 = 4.800On、” 1.56873   
 v、 = 63.16rs= −92,8429 d、= 0.1500 r4= 20.7944 d−= 14500    fi3= 1.60311
    vs= 60.70rs=51.7240 ds=D+(可変) rs” 100.5677 da=0.9000    na= 1.72000 
   v−= 50.25ry=9.0549 d7= 3.2000 ra” −11,5198 d、= 0.8000    ns= 1.60311
   17.: 60.7Or、= 12.5374 d−= 2.0000    ns” 1.84666
    シg=23.78r、、  =73.5525 d、。=D2(可変) r++ = 14.7025  (非球面)d、、〜3
.3000    n、”1.69680     v
、〜55.52r+*  =−55,8822 dtg=1−0000 r+i、=■(絞り) d、、= 1.5000 r+4 =9.4162 dr4= 2.6000   ns= 1.69680
   V6= 55.52r、、  〜30.8448 a、、= 0.7000 r、、  =−32,9050 d+s= 0.8000    ns= 1.8466
6     V9= 23.78rat  =lO,4
169 d+t=Dx(可変) r、、 〜10.1889  (非球面)d+s=3.
600Onto  〜1.56873 11+o=63
.16rts  =−14,9311 d+e=o4(可変) rio  = ■ d−o= 1.0000    fiz  = 1.5
1633  シ、、=64.15r21 =■ d、、=5.8600    n、2 =1.5477
1   シ、、=62.83r2□ =閃 d2□= 1.210(1 r23 =■ d2.=0.600On、s  ”1.48749  
ν、、”70.20r24 =(資) 非球面係数 (第11面) P = 1.0000 、 A、 =−0,18511
X 10−’A、=−0,ID252x 10−’ 、
A、 =0.13963 x to−’(第18面) P = 1.0000 、 A4= −0,37628
x 10−”A、=0.47003  xlO−’  
、  Aa  =−0,24529xlO−7f   
6.700 18.383 50.44DI   0.
700 10.890 18.161D218.161
 7.971 0.700D、   4.709 2.
563 6.507D、   2.718 4.864
 0.920全長(広角端) =63.025 、  
前玉有効径=25.7R3,/((Ns、−1)4「G
τr、)=1.148R3a/((t−N、、l、/T
;7TTl = −0,669(D璽+D*)/、l−
−T7;=;7f“T  =0.734D、/f、”=
 2.558 x 10−3.  f4/f、= 1.
676fRs + +R,□)/ (R,r−Ra2)
 = −0,583(Rss+Rsg)/ 1Rss−
Raa)  = 0.519R,、/R,6=0.97
8 ただしrl、 r2.−・−はレンズ各面の曲率半径、
d、、 d、、・−・は各レンズの肉厚およびレンズ間
隔、n 1 + n z + ・・−は各レンズの屈折
率、シ1.シ2.・−・は各レンズのアツベ数である。
Rsa/(tl-N*,l,rnτ'f';)=-0,
797(Dm"Dwl /4r67G== 0.670
DT/fT”=2.764×10-”,
f, /f, = 2.260 (R□R3□)/(R,
l-R, □) =-[1,526[R,, ÷R3B)/
fR,l-R,,) =0.972R,,/R,,=0
.. 935 Example 11 f=6.900~3δ, 800, F/1.44~F
72.082ω=49.0”9.2' r, = 48.3921 d+=1.100ro il, = 1.34666
shi, = 23.78rz= 22.602
9 dz= 4.4000 nt= 1.60311
vz= 60.70rs"-88,9707 ds= 0.1500 r4= 16.1314 d4= 3.3000 il, = 1.6968
0 v-=55.52rs=48.9345 a5=O+(variable) rs=175.6903 ds=0.9000 n4=1.83400
v4 = 37.16rt = 6.1347 dy = 2.6000 rs = -8,6183 da = 0.8000 jl, = 1.6031
1 vs= 60.70re" 9.2778 d-= 2.3000 ns= 1.8466
6 vs=23.78rho=-114
,7736 dl. =D2 (variable) rlr = 11.4364 (aspherical surface) d++=
3-6000 n7= 1.58913
νt=60.97r+*=-3
1,1462 d, 2-4.9 (10[1 r, 3=OO (aperture) d,, = 0.1500 r14 =9.6567 d, 4=3.20DOj18= 1.72000
v, = 50.25r, v, = -151,58
57 d+s=0.1500 r,, = 106.9332 d+a= 0.8000 n, = 1.8466
6 v, = 23.78 rat ~6.23
25 d+y=Ds (variable) r+a ~8.0472 (aspherical surface) d,, = 3.300 ro n,. = 1.58
913 v,,=60.97r+*=-38
,5309 d+e=04 (variable) r20 :oO dio=6. (1000n,, ~1.51633
v,,~64.15r,,:00 Aspheric coefficient (11th surface) P~1. DOOO, A4 = -〇, 15016x
IQ-3A, = -0,17588x 10-',
A, =D, 21506 x 1O-7 (18th surface) P = 1.0000, A, =-0,11
98[1x 10-”A6=-D, 12802X10-
', All ~0.31248 x 10-'f
6.900 16.326 38.8
00D, 0.900 7.000 11.
465D, 11.165 5.066
0.600D, 4.332 2.500
5.803D4 3.470 5.303
2.000 total length (wide-angle end) ~52.955,
Front element effective diameter = 21.2 Rat/((Nat-1)7r
67 stones) = 1.186 Ri6/((1-N,, lJ2151τ) = -0,450 (D seal + DW), #T; -τ
-r=0.822DT/fT″=3.855×1
0-”, f4/f, = 1.682 (R3,
÷Raa)/fR3+-R-a) = -0,463
[R3s+Ra5)/(Rag-Ra6)=1.
124R,, /R,, ~1.291 Example 12 f = 6.700 ~ 50.44, F/1.44
~F72.112ω= 50.4@ ~7.2” r+= 55.1109 d, = 1.3000 n, = 1.8466
6 v, = 23.78 rz = 28.8970 d, = 4.800 On,” 1.56873
v, = 63.16rs = -92,8429 d, = 0.1500 r4 = 20.7944 d- = 14500 fi3 = 1.60311
vs= 60.70rs=51.7240 ds=D+(variable) rs" 100.5677 da=0.9000 na= 1.72000
v-= 50.25ry=9.0549 d7= 3.2000 ra” -11,5198 d,= 0.8000 ns= 1.60311
17. : 60.7Or, = 12.5374 d-= 2.0000 ns” 1.84666
sig=23.78r,, =73.5525d,. =D2 (variable) r++ = 14.7025 (aspherical surface) d,,~3
.. 3000 n, 1.69680 v
, ~55.52r+* =-55,8822 dtg=1-0000 r+i, = ■ (aperture) d,,= 1.5000 r+4 =9.4162 dr4= 2.6000 ns= 1.69680
V6 = 55.52r,, ~30.8448 a,, = 0.7000 r,, = -32,9050 d+s = 0.8000 ns = 1.8466
6 V9=23.78rat=lO,4
169 d+t=Dx (variable) r,, ~10.1889 (aspherical surface) d+s=3.
600Onto ~1.56873 11+o=63
.. 16rts = -14,9311 d+e=o4 (variable) rio = ■ d-o= 1.0000 fiz = 1.5
1633 ci,, =64.15r21 =■ d,, =5.8600 n,2 =1.5477
1 shi,, =62.83r2□ = flash d2□= 1.210 (1 r23 =■ d2.=0.600On, s ”1.48749
ν,,”70.20r24 = (capital) Aspheric coefficient (11th surface) P = 1.0000, A, =-0,18511
X 10-'A, = -0, ID252x 10-',
A, =0.13963 x to-' (18th surface) P = 1.0000, A4 = -0,37628
x 10-"A, = 0.47003 xlO-'
, Aa = -0,24529xlO-7f
6.700 18.383 50.44DI 0.
700 10.890 18.161D218.161
7.971 0.700D, 4.709 2.
563 6.507D, 2.718 4.864
0.920 total length (wide-angle end) = 63.025,
Front element effective diameter = 25.7R3, / ((Ns, -1) 4"G
τr, )=1.148R3a/((t-N,,l,/T
;7TTl = -0,669 (D seal + D*)/, l-
−T7;=;7f “T =0.734D,/f,”=
2.558 x 10-3. f4/f,=1.
676fRs + +R, □)/ (R, r-Ra2)
= −0,583(Rss+Rsg)/1Rss−
Raa) = 0.519R,, /R,6=0.97
8 However, rl, r2. −・− is the radius of curvature of each lens surface,
d,, d, . . . are the thickness of each lens and the distance between the lenses, n 1 + nz + . . . are the refractive index of each lens, and s1. C2. ... is the Atsube number of each lens.

上記実施例1乃至実施例12のレンズ構成は、夫々第1
図乃至第12図に示す通りである。
The lens configurations of Examples 1 to 12 are as follows:
As shown in FIGS. 12 to 12.

実施例1.3.4.7.9.10.11.12は、第1
群と第3群が常時固定である。これらのうち実施例1と
実施例7は、第3群が2枚の正レンズと像側に強い曲面
を向けた負レンズとからなり、又実施例3.4.9.1
0.11.12は、第3群が1枚の正レンズと像側に強
い凹面を向けた負レンズとからなっている。
Example 1.3.4.7.9.10.11.12 is the first
The group and the third group are always fixed. Of these, in Examples 1 and 7, the third group consists of two positive lenses and a negative lens with a strongly curved surface facing the image side, and Example 3.4.9.1
0.11.12, the third group consists of one positive lens and a negative lens with a strongly concave surface facing the image side.

実施例1.3.4.7.11.12は、第3群の最も物
体側の面と第4群の物体側の面が光軸から離れるにした
がって曲率が小さくなるような非球面である。又実施例
9は第3群、第4群のすべてのレンズが光軸から離れる
にしたがって屈折率が減少するような不均質媒質で構成
されている。
Example 1.3.4.7.11.12 is an aspheric surface whose curvature decreases as the surface of the third group closest to the object and the surface of the fourth group closest to the object move away from the optical axis. . In Example 9, all the lenses in the third and fourth groups are made of a non-homogeneous medium whose refractive index decreases as the distance from the optical axis increases.

実施例1Oは、第3群の物体側の正レンズが光軸から離
れるにしたがって、屈折率が減少するような不均質媒質
で構成されており、更に第4群の物体面が光軸からはな
れるにしたがって、曲率が小さくなるような非球面で構
成されている。
In Example 1O, the positive lens on the object side of the third group is composed of a heterogeneous medium whose refractive index decreases as the distance from the optical axis increases, and the object surface of the fourth group is further away from the optical axis. It is composed of an aspherical surface whose curvature decreases as it becomes more curved.

実施例2.5.6.8は、第3群のみが常時固定で、第
1群と第2群とが変倍時にある一定の比率で逆方向へ移
動する。
In Embodiment 2.5.6.8, only the third group is always fixed, and the first and second groups move in opposite directions at a certain constant ratio when changing the magnification.

実施例2と実施例8は、第3群と第4群の構成が夫々実
施例1と実施例7とにほぼ同じで実施例5と実施例6は
、第3群と第4群の構成が夫々実施例3と実施例4とほ
ぼ同じである。
In Examples 2 and 8, the configurations of the third group and the fourth group are almost the same as in Examples 1 and 7, respectively, and in Examples 5 and 6, the configurations of the third group and the fourth group are almost the same as those in Example 1 and Example 7, respectively. are substantially the same as those in Example 3 and Example 4, respectively.

実施例11i3よび12は、第3群の最も物体側の正レ
ンズと次のレンズとの間に絞りを設けたもので、実施例
1のように絞りを第3群より物体側へ配置するよりも、
全長を短く収差状況を良好にするためには有利である。
In Examples 11i3 and 12, a diaphragm is provided between the positive lens closest to the object side of the third group and the next lens. too,
This is advantageous for shortening the overall length and improving aberration conditions.

それは第3群と第4群とで形成される結像系としての全
長を実施例1の場合に比べて少し長(しやすいからであ
る。
This is because it is easier to make the total length of the imaging system formed by the third and fourth groups a little longer than in the first embodiment.

実施例1などで用いている非球面の形状は、面頂(面と
光軸との交点)を原点、光軸方向をX軸、光軸と垂直な
方向をy軸とする時、次の式にて表わされる。
The shape of the aspheric surface used in Example 1 etc. is as follows, when the apex of the surface (the intersection of the surface and the optical axis) is the origin, the direction of the optical axis is the X axis, and the direction perpendicular to the optical axis is the y axis. It is expressed by the formula.

ただしCは面頂での曲率、pは円錐定数、Aa+は非球
面係数である。
However, C is the curvature at the top of the surface, p is the conic constant, and Aa+ is the aspheric coefficient.

又実施例9.lOで用いている不均質媒質(屈折率分布
型レンズ)の屈折率分布は次の式で表わされる。
Also, Example 9. The refractive index distribution of the inhomogeneous medium (gradient index lens) used in IO is expressed by the following equation.

n(r)=No+N1r”+N2r’+ +++ただし
rは光軸からの距離、n (r)は距!lrにおける屈
折率、Noは軸上での屈折率、N、、N、、・・・は分
布係数である6 [発明の効果] 本発明の変倍レンズは、リレー系である正の第4群を工
夫することにより構成枚数が少なく、変倍比が大で明る
いレンズ系である。
n(r)=No+N1r''+N2r'+ +++where r is the distance from the optical axis, n(r) is the distance!Refractive index at lr, No is the refractive index on the axis, N,, N,... is a distribution coefficient 6 [Effects of the Invention] The variable power lens of the present invention is a bright lens system with a small number of constituent elements and a large variable power ratio by devising a positive fourth group that is a relay system.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図乃至第12図は夫々本発明の実施例1乃至実施例
12の断面図、第13図、第14図、第15図は、夫々
実施例1の広角端、中間焦点距離、望遠端の収差曲線図
、第16図、第17図、第18図は夫々実施例2の広角
端、中間焦点距離。 望遠端の収差曲線図、第19図、第29図、第21図は
夫々実施例3の広角端、中間焦点距離。 望遠端の収差曲線図、第22図、第23図、第24図は
夫々実施例4の広角端、中間焦点距離。 望遠端の収差曲線図、第25図、第26図、第27図は
夫々実施例5の広角端、中間焦点距離。 望遠端の収差曲線図、第28図、第29図、第30図は
夫々実施例6の広角端、中間焦点距離。 望遠端の収差曲線図、第31図、第32図、第33図は
夫々実施例7の広角端、中間焦点距離。 望遠端の収差曲線図、第34図、第35図、第36図は
夫々実施例8の広角端、中間焦点距離。 望遠端の収差曲線図、第37図、第38図、第39図は
夫々実施例9の広角端、中間焦点距離。 望遠端の収差曲線図、第40図、第41図、第42図は
夫々実施例10の広角端、中間焦点距離、望遠端の収差
曲線図、第43図、第44図、第45図は夫々実施例1
1の広角端、中間焦点距離、望遠端の収差曲線図、第4
6図、第47図、第48図は夫々実施例12の広角端、
中間焦点距離、望遠端の収差曲線図である。 出願人 オリンパス光学工業株式会社 代理人   向    寛  二 第1図 第2図 第4図 第5図 第6図 第7図 第8図 窮10図 第11図 第12図 第13図 第14図 第15図 第16図 第17図 第18図 3819図 第21図 第22図 第23図 第24図 第25図 2第26図 第27図 第28図 第29図 第36図 第31図 第32図 第33図 第34図 第35図 第36図 第37図 第38図 球面収差 非点収差  鉦曲収差 第39図 第40図 第41図 球面収差  非点収差  歪曲収差 第42図 非点収差  丼M、収差  歪曲収差 第43図 第44図 第45図 第46図 第47図 第48図 手  続  補  正  書 平成2年/−月ユ2 日
1 to 12 are cross-sectional views of Embodiments 1 to 12 of the present invention, respectively, and FIGS. 13, 14, and 15 are sectional views of Embodiment 1 at the wide-angle end, intermediate focal length, and telephoto end, respectively. The aberration curve diagrams of FIG. 16, FIG. 17, and FIG. 18 are for the wide-angle end and intermediate focal length of Example 2, respectively. The aberration curve diagrams at the telephoto end, FIG. 19, FIG. 29, and FIG. 21 are the wide-angle end and intermediate focal length of Example 3, respectively. The aberration curve diagrams at the telephoto end, FIGS. 22, 23, and 24 are the wide-angle end and intermediate focal length of Example 4, respectively. The aberration curve diagrams at the telephoto end, FIG. 25, FIG. 26, and FIG. 27 are the wide-angle end and intermediate focal length of Example 5, respectively. The aberration curve diagrams at the telephoto end, FIGS. 28, 29, and 30 are the wide-angle end and intermediate focal length of Example 6, respectively. The aberration curve diagrams at the telephoto end, FIG. 31, FIG. 32, and FIG. 33 are the wide-angle end and intermediate focal length of Example 7, respectively. The aberration curve diagrams at the telephoto end, FIG. 34, FIG. 35, and FIG. 36 are the wide-angle end and intermediate focal length of Example 8, respectively. The aberration curve diagrams at the telephoto end, FIGS. 37, 38, and 39 are the wide-angle end and intermediate focal length of Example 9, respectively. The aberration curve diagrams at the telephoto end, FIGS. 40, 41, and 42 are the aberration curve diagrams at the wide-angle end, intermediate focal length, and telephoto end of Example 10, and FIGS. 43, 44, and 45 are respectively the aberration curve diagrams at the telephoto end. Example 1
1. Aberration curve diagram at wide-angle end, intermediate focal length, and telephoto end, 4th
6, 47, and 48 are the wide-angle end of Example 12, respectively.
FIG. 3 is an aberration curve diagram at an intermediate focal length and a telephoto end. Applicant Olympus Optical Industry Co., Ltd. Agent Hiroshi Mukai Figure 1 Figure 2 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 3819 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 2 Figure 26 Figure 27 Figure 28 Figure 29 Figure 36 Figure 31 Figure 32 Fig. 33 Fig. 34 Fig. 35 Fig. 36 Fig. 37 Fig. 38 Spherical aberration Astigmatism Bent aberration Fig. 39 Fig. 40 Fig. 41 Spherical aberration Astigmatism Distortion aberration Fig. 42 Astigmatism Bowl M, Aberration Distortion Figure 43 Figure 44 Figure 45 Figure 46 Figure 47 Figure 48 Procedure Correction Book 1990/-Monday 2nd

Claims (1)

【特許請求の範囲】  物体側から順に正の屈折力を有する第1群と、負の屈
折力を有する第2群とよりなる変倍系と、正の屈折力を
有し常時固定の第3群と、正の屈折力を有し変倍時およ
び被写体距離の変化等の時に焦点位置を調節するために
可動である第4群とよりなる変倍レンズにおいて、前記
第3群が物体側より順に1枚又は2枚の正レンズと、像
側に強い凹面を向けた1枚の負レンズとにて構成され、
前記第4群が両凸レンズ1枚にて構成され、第3群又は
大4群が少なくとも一つのレンズが非球面を有するか不
均質媒質からなり、次の条件(1)、(2)、(3)を
満足する全長の短い変倍レンズ。 (1)0.3<R_3_1/{(N_3_1−1)√(
fw・f¥r)}<2.0(2)−1.6<R_3_5
/{(1−N_3_3)√(fw・fr)}<−0.2
(3)0.3<(D_III+D_IV)/√(fw・fr
)<1.5ただしfw、fTは夫々広角端、望遠端にお
ける全系の焦点距離、D_IIIは第3群の最も物体側の
面頂から最も像側の面頂までの距離、D_IVは第4群の
肉厚、R_3_1、R_3_6は夫々第3群の最も物体
側の面および最も像側の面の曲率半径、N_3_1、N
_3_3は夫々第3群の最も物体側のレンズおよび最も
像側のレンズの屈折率である。
[Claims] A variable power system consisting of, in order from the object side, a first group having a positive refractive power, a second group having a negative refractive power, and a third group having a positive refractive power which is always fixed. and a fourth group that has positive refractive power and is movable to adjust the focal position when changing the magnification or when changing the subject distance, the third group is located from the object side. Consisting of one or two positive lenses and one negative lens with a strongly concave surface facing the image side,
The fourth group is composed of one biconvex lens, and at least one lens of the third group or the fourth large group has an aspherical surface or is made of a non-uniform medium, and the following conditions (1), (2), ( A variable magnification lens with a short overall length that satisfies 3). (1) 0.3<R_3_1/{(N_3_1-1)√(
fw・f¥r)}<2.0(2)-1.6<R_3_5
/{(1-N_3_3)√(fw・fr)}<-0.2
(3) 0.3<(D_III+D_IV)/√(fw・fr
)<1.5 However, fw and fT are the focal lengths of the entire system at the wide-angle end and the telephoto end, respectively, D_III is the distance from the top of the surface closest to the object side to the top of the surface closest to the image side of the third lens group, and D_IV is the distance of the fourth lens group. The thickness of the group, R_3_1, R_3_6 is the radius of curvature of the surface closest to the object side and the surface closest to the image side of the third group, respectively, N_3_1, N
_3_3 is the refractive index of the lens closest to the object side and the lens closest to the image side of the third group, respectively.
JP2220966A 1990-06-11 1990-08-24 Zoom lens with short overall length Expired - Fee Related JP2909765B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2220966A JP2909765B2 (en) 1990-08-24 1990-08-24 Zoom lens with short overall length
US07/712,980 US5189558A (en) 1990-06-11 1991-06-10 Vari-focal system having short total length

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2220966A JP2909765B2 (en) 1990-08-24 1990-08-24 Zoom lens with short overall length

Publications (2)

Publication Number Publication Date
JPH04104114A true JPH04104114A (en) 1992-04-06
JP2909765B2 JP2909765B2 (en) 1999-06-23

Family

ID=16759348

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2909765B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999036821A1 (en) * 1998-01-14 1999-07-22 Matsushita Electric Industrial Co., Ltd. Zoom lens and video camera and electronic still camera using this
JP2001066500A (en) * 1999-08-27 2001-03-16 Canon Inc Variable magnification optical system having vibration- proof function
US6650484B2 (en) 2000-06-21 2003-11-18 Matsushita Electric Industrial Co., Ltd. Zoom lens, and its manufacturing method
JP2009198799A (en) * 2008-02-21 2009-09-03 Sony Corp Collapsible zoom lens
JP2012027084A (en) * 2010-07-20 2012-02-09 Canon Inc Zoom lens and imaging device having the same
US8593735B2 (en) 2010-04-28 2013-11-26 Olympus Corporation Image forming optical system and electronic image pickup apparatus using the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999036821A1 (en) * 1998-01-14 1999-07-22 Matsushita Electric Industrial Co., Ltd. Zoom lens and video camera and electronic still camera using this
JP2001066500A (en) * 1999-08-27 2001-03-16 Canon Inc Variable magnification optical system having vibration- proof function
JP4545849B2 (en) * 1999-08-27 2010-09-15 キヤノン株式会社 Variable magnification optical system
US6650484B2 (en) 2000-06-21 2003-11-18 Matsushita Electric Industrial Co., Ltd. Zoom lens, and its manufacturing method
JP2009198799A (en) * 2008-02-21 2009-09-03 Sony Corp Collapsible zoom lens
US8593735B2 (en) 2010-04-28 2013-11-26 Olympus Corporation Image forming optical system and electronic image pickup apparatus using the same
JP2012027084A (en) * 2010-07-20 2012-02-09 Canon Inc Zoom lens and imaging device having the same

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