JP2001021804A - Zoom lens - Google Patents
Zoom lensInfo
- Publication number
- JP2001021804A JP2001021804A JP11191514A JP19151499A JP2001021804A JP 2001021804 A JP2001021804 A JP 2001021804A JP 11191514 A JP11191514 A JP 11191514A JP 19151499 A JP19151499 A JP 19151499A JP 2001021804 A JP2001021804 A JP 2001021804A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- group
- positive
- negative
- refractive power
- 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
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
- G02B15/144—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 four groups only
- G02B15/1441—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 four groups only the first group being positive
- G02B15/144113—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 four groups only the first group being positive arranged +-++
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はテレビカメラ、ビデ
オカメラ、写真用カメラ、そしてデジタルカメラ等に好
適なズームレンズに関し、特に第１群中の一部のレンズ
群でフォーカスを行う、いわゆるインナーフォーカス式
を用いることにより至近撮影距離が短く、被写体距離全
般にわたり、高い光学性能を有したズームレンズに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zoom lens suitable for a television camera, a video camera, a photographic camera, a digital camera, etc., and more particularly to a so-called inner focus in which a part of the first lens group focuses. The present invention relates to a zoom lens having high optical performance over the entire subject distance with a short shooting distance by using the formula.
【０００２】[0002]
【従来の技術】従来よりテレビカメラやビデオカメラ等
のズームレンズにはカメラ全体の小型化に伴い、レンズ
系全体が小型で、しかも大口径比、高変倍比、そして広
角のものが要求されている。2. Description of the Related Art Conventionally, zoom lenses for television cameras, video cameras, and the like have been required to have a small lens system with a large aperture ratio, a high zoom ratio, and a wide angle, as the size of the entire camera has been reduced. ing.
【０００３】ズームレンズのうち物体側から順に合焦用
の正の屈折力の第１群（合焦レンズ群）変倍用の負の屈
折力の第２群（変倍レンズ群）、変倍に伴って変動する
像面を補正する為の正又は負の屈折力の第３群（補正レ
ンズ群）、開口絞り、そして結像用の正の屈折力の第４
群（リレーレンズ群）の４つのレンズ群より成る、所謂
４群ズームレンズにおいて、第１群中の一部のレンズを
移動させてフォーカスを行う、インナーフォーカス式を
採用したものが、特公昭５９−４６８６号公報、特開平
６−２４２３７８号公報等で提案されている。In the zoom lens, in order from the object side, a first group having a positive refractive power for focusing (focusing lens group), a second group having a negative refractive power for zooming (magnifying lens group), and a variable magnification The third group (correction lens group) having a positive or negative refractive power for correcting an image plane which fluctuates with the above, an aperture stop, and the fourth group having a positive refractive power for imaging.
A so-called four-group zoom lens, which includes four lens groups (relay lens group), employs an inner focus type in which a part of the first group is moved to perform focusing, and Japanese Patent Publication No. SHO 59-59. No. 4686, Japanese Patent Laid-Open No. 6-242378, and the like.
【０００４】同公報等では第１群を負の屈折力の第１１
群、正の屈折力の第１２群、そして正の屈折力の第１３
群の３つのレンズ群より構成し、無限遠物体から至近距
離物体にかけてのフォーカスを第１２群を像面側へ移動
させて行っている。In the same publication, the first lens unit has a negative refractive power of 11th.
Group, twelfth group with positive refractive power, and thirteenth group with positive refractive power
It is composed of three lens groups, and focuses from an object at infinity to an object at a close distance by moving the twelfth group to the image plane side.
【０００５】一般にインナーフォーカス式のズームレン
ズは第１群全体を移動させてフォーカスを行うズームレ
ンズに比べて第１群の有効径が小さくなり、レンズ系全
体の小型化が容易となり、又近接撮影、特に極近接撮影
が容易となり、更に比較的小型軽量のレンズ群を移動さ
せて行っているのでレンズ群の駆動力が小さくてすみ、
迅速な焦点合わせができるなどの特徴を有している。In general, an inner focus type zoom lens has a smaller effective diameter of the first lens group than a zoom lens which moves and focuses the entire first lens group. In particular, extremely close-up shooting is facilitated, and the relatively small and lightweight lens group is moved, so that the driving force of the lens group can be small,
It has features such as quick focusing.
【０００６】[0006]
【発明が解決しようとする課題】一般にズームレンズに
おいてインナーフォーカス方式を採用すると前述の如く
レンズ系全体が小型化され、又迅速なるフォーカスが可
能となり、更に近接撮影が容易になるなどの特徴が得ら
れる。Generally, when the inner focus method is adopted in a zoom lens, the whole lens system is reduced in size as described above, quick focusing becomes possible, and further, close-up photographing becomes easy. Can be
【０００７】しかしながら反面、大口径比（Ｆナンバー
１．６）で高変倍比（ズーム比８〜１５程度）で至近物
体距離を短縮しつつ広角化を行うと歪曲収差の増大、特
に広角端における負の歪曲収差が増大してしまうという
問題が顕著になる。On the other hand, however, if the wide angle is achieved while reducing the close object distance with a large aperture ratio (F number 1.6) and a high zoom ratio (zoom ratio of about 8 to 15), distortion increases, especially at the wide angle end. In this case, the problem that the negative distortion is increased becomes significant.
【０００８】これは、至近物体距離を短縮して広角化を
達成しようとすると第１群中の最も物体側にあるレンズ
群（第１１群）のパワーを強める必要があり、これが広
角端の負の歪曲収差を増大させるからである。In order to achieve a wide angle by shortening the closest object distance, it is necessary to increase the power of the lens unit (the eleventh unit) closest to the object in the first unit, which is negative at the wide angle end. Is increased.
【０００９】一般に全変倍範囲にわたり高い光学性能を
得るには、例えば各レンズ群のレンズ枚数を増加させて
収差補正上の自由度を増やすことが必要となってくる。Generally, in order to obtain high optical performance over the entire zoom range, it is necessary to increase, for example, the number of lenses in each lens group to increase the degree of freedom in aberration correction.
【００１０】この為、大口径で広画角、高変倍比のズー
ムレンズを達成しようとすると、レンズ枚数が増加し、
レンズ系全体が大型化してくるという問題点が生じてき
て、小型軽量化の要望に応えることができなくなってく
る。Therefore, in order to achieve a zoom lens having a large aperture, a wide angle of view, and a high zoom ratio, the number of lenses increases.
A problem arises in that the entire lens system becomes large, and it is no longer possible to meet the demand for miniaturization and weight reduction.
【００１１】本発明は、４群ズームレンズを構成するフ
ォーカス用の第１群の一部のレンズ群を光軸上移動させ
てフォーカスを行うインナーフォーカスを採用しつつ、
広画角化及び至近物体距離の短縮、及び高変倍化を図る
とともに、レンズ系全体の小型化を図りつつ広角端の負
の歪曲収差がよく補正された高い光学性能のズームレン
ズの提供を目的とする。The present invention employs an inner focus in which a part of a first lens group for focusing constituting a four-group zoom lens is moved on an optical axis to perform focusing.
To provide a zoom lens with high optical performance in which a wide angle of view, a short object distance and a high zoom ratio are achieved, and the negative distortion at the wide-angle end is well corrected while reducing the size of the entire lens system. Aim.
【００１２】[0012]
【課題を解決するための手段】請求項１の発明のズーム
レンズは、物体側より順に正の屈折力の第１群、変倍用
の負の屈折力の第２群、変倍に伴う像面変動を補正する
正又は負の屈折力の第３群、開口絞り、そして変倍中固
定の結像作用を有する第４群とを有したズームレンズに
おいて、該第２群は変倍の際に結像倍率が−１倍を含む
領域内で変化し、該第１群は合焦時に固定で負の屈折力
の第１１群と、合焦時に光軸に沿って移動する第１２群
と、合焦時固定の正の屈折力の第１３群を有し、第１１
群の焦点距離をｆ１１、第１２群の焦点距離をｆ１２、
第１３群の焦点距離をｆ１３、第１群の焦点距離をｆ１
としたとき １．２≦｜ｆ１１／ｆ１｜≦１．７ ‥‥‥（１） ４．０≦ｆ１２／ｆ１≦７．０ ‥‥‥（２） １．１≦ｆ１３／ｆ１≦１．７ ‥‥‥（３） を満足し、更に第１２群中、軸上光束の最大入射高をｈ
Ｔ、広角端での最大画角の軸外光束の最大入射高をｈＷ
としたとき、ｈＷ＞ｈＴを満足する少なくとも１つのレ
ンズ面に、正の屈折面に施した場合はレンズ周辺に行く
に従い正の屈折力が強くなる非球面又は負の屈折面に施
した場合はレンズ周辺に行くに従い負の屈折力が弱くな
る形状の非球面を有し、かつ第１３群には、正の屈折面
に施した場合はレンズ周辺に行くに従い正の屈折力が弱
くなる非球面又は負の屈折面に施した場合はレンズ周辺
に行くに従い負の屈折力が強くなる形状の非球面を少な
くとも１面有することを特徴としている。According to a first aspect of the present invention, there is provided a zoom lens having a first lens unit having a positive refractive power, a second lens unit having a negative refractive power for zooming, and an image associated with zooming. In a zoom lens having a third lens unit having a positive or negative refractive power for correcting a surface variation, an aperture stop, and a fourth lens unit having a fixed image forming function during zooming, the second lens unit is used for zooming. The first lens unit has a negative refractive power which is fixed at the time of focusing and a twelfth lens unit which moves along the optical axis at the time of focusing. Has a thirteenth group of positive refractive power fixed at the time of focusing, and
The focal length of the group is f11, the focal length of the twelfth group is f12,
The focal length of the 13th lens group is f13, and the focal length of the first lens group is f1.
1.2 ≦ | f11 / f1 | ≦ 1.7 (1) 4.0 ≦ f12 / f1 ≦ 7.0 (2) 1.1 ≦ f13 / f1 ≦ 1.7 ‥‥‥ (3) is satisfied, and in the twelfth group, the maximum incident height of the on-axis light flux is defined as h
T, the maximum incident height of the off-axis luminous flux having the maximum angle of view at the wide-angle end is hW
When applied to at least one lens surface that satisfies hW> hT, when applied to a positive refractive surface, applied to an aspherical surface or a negative refractive surface where the positive refractive power becomes stronger toward the periphery of the lens. The thirteenth lens group has an aspheric surface whose positive refractive power becomes weaker toward the lens periphery when applied to a positive refractive surface. Alternatively, at least one aspherical surface having a shape in which the negative refractive power becomes stronger toward the periphery of the lens when applied to the negative refraction surface.
【００１３】請求項２の発明は請求項１の発明におい
て、前記第１２群は１つの正の第１２pレンズを有して
おり、該正の第１２ｐレンズの材質の屈折力をＮ１２ｐ
とし、前記第１３群は１つの負の第１３ｎレンズを有し
ており、該負の第１３ｎレンズの材質の屈折力をＮ１３
ｎとし、広角端における前記第２群の横倍率をβＶＷと
したとき Ｎ１２ｐ≦１．６７ ‥‥‥（４） １．７６≦Ｎ１３ｎ ‥‥‥（５） −０．４≦βＶＷ≦−０．２ ‥‥‥（６） を満足することを特徴としている。According to a second aspect of the present invention, in the first aspect, the twelfth group has one positive twelfth lens, and the refractive power of the material of the positive twelfth lens is N12p.
The 13th lens unit has one negative 13n lens, and the refractive power of the material of the negative 13n lens is N13.
n12p ≦ 1.67 前 記 (4) 1.76 ≦ N13n ‥‥‥ (5) −0.4 ≦ βVW ≦ −0. 2 ‥‥‥ (6) is satisfied.
【００１４】[0014]
【発明の実施の形態】図１，図６，図１１は各々本発明
の数値実施例１，２，３の広角端におけるレンズ断面図
である。FIG. 1, FIG. 6, and FIG. 11 are lens cross-sectional views at the wide angle end of Numerical Examples 1, 2, and 3, respectively.
【００１５】図２，図３，図４，図５は本発明の数値実
施例１のｆ＝５．７２で無限遠物体、ｆ＝２２．８８で
無限遠物体、ｆ＝４５．７７で無限遠物体、ｆ＝４５．
７７で至近距離物体での収差図である。FIGS. 2, 3, 4, and 5 show an infinite object at f = 5.72, an infinite object at f = 22.88, and an infinite object at f = 45.77 in Numerical Embodiment 1 of the present invention. Distant object, f = 45.
FIG. 77 is an aberration diagram of a close object at 77.
【００１６】図７，図８，図９，図１０は本発明の数値
実施例２のｆ＝５．７２で無限遠物体、ｆ＝２２．８８
で無限遠物体、ｆ＝４５．７７で無限遠物体、ｆ＝４
５．７７で至近距離物体での収差図である。FIGS. 7, 8, 9, and 10 show an object at infinity at f = 5.72 in numerical embodiment 2 of the present invention, and f = 22.88.
At infinity, f = 45.77 at infinity, f = 4
FIG. 5 is an aberration diagram for a close object at 5.77.
【００１７】図１２，図１３，図１４，図１５は本発明
の数値実施例３のｆ＝６．７で無限遠物体、ｆ＝２６．
６３で無限遠物体、ｆ＝９９．８３で無限遠物体、ｆ＝
９９．８３で至近距離物体での収差図である。FIGS. 12, 13, 14 and 15 show an object at infinity at f = 6.7 in numerical embodiment 3 of the present invention, and f = 26.
63 at infinity, f = 99.83 at infinity, f =
FIG. 9 is an aberration diagram for a close object at 99.83.
【００１８】図中、Ｆは第１群としての正の屈折力のフ
ォーカス群（第１レンズ群）であり、合焦（フォーカ
ス）時固定で負の屈折力の第１１群Ｆ１１と、正の屈折
力で少なくとも１つの正の第１２ｐレンズを有する光軸
上移動してフォーカスを行う第１２群Ｆ１２、そして合
焦時固定で正の屈折力で少なくとも１つの負の第１３ｎ
レンズを有する第１３群Ｆ１３とを有している。In the drawing, F denotes a focus group (first lens group) having a positive refractive power as a first group, and an 11th group F11 having a fixed refractive power and a negative refractive power, and a positive lens. A twelfth unit F12 that moves on the optical axis to perform focusing by having at least one positive twelfth p-th lens with a refractive power, and at least one negative thirteenth lens that has a positive refractive power and is fixed at the time of focusing
And a thirteenth group F13 having a lens.
【００１９】無限遠物体から至近距離物体へのフォーカ
スは第１２群Ｆ１２を像面側へ移動させて行っている。
Ｖは第２群としての変倍用の負の屈折力のバリエーター
（第２群）であり、光軸上像面側へ単調に移動させるこ
とにより、広角端（ワイド）から望遠端（テレ）への変
倍を行っている。Focusing from an object at infinity to an object at a close distance is performed by moving the twelfth lens unit F12 to the image plane side.
V denotes a variator (second group) having a negative refractive power for zooming as a second group, which is monotonously moved to the image plane side on the optical axis to change from the wide-angle end (wide) to the telephoto end (tele). To zoom.
【００２０】第２群Ｖは広角端から望遠端への変倍の際
に結像倍率が−１倍を含む領域内で変化させている。Ｃ
は第３群としての正又は負の屈折力のコンペンセーター
であり、変倍に伴う像面変動を補正する為に、物体側へ
直線的に又は物体側へ凸状の軌跡を有して移動してい
る。The second lens unit V is changed in an area including an imaging magnification of -1 at the time of zooming from the wide-angle end to the telephoto end. C
Is a compensator having a positive or negative refractive power as a third unit, which moves linearly to the object side or has a convex locus toward the object side in order to correct image plane fluctuation due to zooming. are doing.
【００２１】ＳＰは開口絞り、Ｒは第４群としての正の
屈折力のリレー群である。Ｇは色分解プリズムや光学フ
ィルター等であり、同図ではガラスブロックとして示し
ている。SP is an aperture stop, and R is a relay group having a positive refractive power as a fourth group. G denotes a color separation prism, an optical filter, and the like, which are shown as glass blocks in FIG.
【００２２】本発明のような４群ズームレンズにおいて
最も物体側の第１群全体を移動させて焦点合わせを行
う、前玉フォーカス方式はどのような焦点距離において
も同一物体距離であれば第１群の繰り出し量が一定にな
るため、レンズ鏡筒構造が簡単になるという特長があ
る。In the four-unit zoom lens system according to the present invention, the entire first lens unit closest to the object side is moved to perform focusing. The front lens focus method uses the first lens unit at the same object distance at any focal length. There is an advantage that the lens barrel structure is simplified because the amount of extension of the group is constant.
【００２３】しかしながら第１群が正の屈折力を有し、
広画角を含むズームレンズにおいては広角端において至
近距離物体に焦点合わせをする際、第１群が物体側へ移
動するため、軸外光束を確保するために第１群の有効径
が増大し、又比較的重量の重い第１群を移動させるため
駆動トルクが増大し、迅速なる合焦が難しくなってく
る。However, the first group has a positive refractive power,
In a zoom lens having a wide angle of view, when focusing on a close object at the wide angle end, the first lens unit moves toward the object side, so that the effective diameter of the first lens unit increases to secure off-axis light flux. In addition, since the first group, which is relatively heavy, is moved, the driving torque is increased, and it is difficult to perform quick focusing.
【００２４】又、４群ズームレンズにおいて、大口径化
を図ろうとすると、前玉レンズ群（前玉）の有効径が著
しく増大してくる。これは軸上光線の入射高が増加する
ためであり、これが原因となってズーミングやフォーカ
シングによる球面収差や色収差をはじめとする諸収差の
発生量が多くなる。一般にこの時の諸収差を良好に補正
するのが難しい。In the case of an attempt to increase the diameter of the four-unit zoom lens, the effective diameter of the front lens unit (front lens) increases significantly. This is because the incident height of the on-axis ray increases, and as a result, the amount of various aberrations such as spherical aberration and chromatic aberration caused by zooming and focusing increases. Generally, it is difficult to satisfactorily correct various aberrations at this time.
【００２５】これに対しレンズ枚数を増やして設計の自
由度を増加させると、レンズ系全体が大型化し重量や製
造コストが増加してくる。On the other hand, if the number of lenses is increased to increase the degree of freedom in design, the entire lens system becomes large, and the weight and manufacturing cost increase.
【００２６】そこで本発明においては各レンズ群を前述
の如く構成し、かつ条件式（１），（２），（３）を満
足するとともに、無限遠物体から至近距離物体への焦点
合わせを第１群中の第１２群Ｆ１２を像面側へ移動させ
て行うインナーフォーカス方式を採用することによって
第１群Ｆのレンズ有効径の増大を防止し、レンズ系全体
の小型化を図り、更に撮影可能な至近距離の短縮化を図
っている。Therefore, in the present invention, each lens group is configured as described above, and while satisfying conditional expressions (1), (2), and (3), focusing from an object at infinity to an object at a close distance is performed. By adopting an inner focus method in which the twelfth lens unit F12 in one lens unit is moved to the image plane side, an increase in the effective diameter of the lens of the first lens unit F is prevented, the size of the entire lens system is reduced, and photographing is further performed. The shortest possible distance is being reduced.
【００２７】特に第１群を構成する第１１群Ｆ１１，第
１２群Ｆ１２，第１３群Ｆ１３の３つのレンズ群と第１
群Ｆとの焦点距離の比を条件式（１），（２），（３）
を満足するように設定することによりレンズ系全体の小
型化と広画角化を同時に達成している。In particular, three lens groups, ie, an eleventh group F11, a twelfth group F12, and a thirteenth group F13, which constitute the first group, and the first group
Conditional expressions (1), (2), (3)
By satisfying the above conditions, the overall size of the lens system can be reduced and the angle of view can be increased.
【００２８】次に前述の条件式（１）〜（３）の技術的
意味について説明する。条件式（１）の下限値を越える
とレンズ系の小型化には有利になるが広角端において負
の歪曲収差が増大し、後述する非球面を導入しても良好
なる収差補正が難しくなる。Next, the technical meaning of the conditional expressions (1) to (3) will be described. Exceeding the lower limit of conditional expression (1) is advantageous for miniaturization of the lens system, but increases negative distortion at the wide-angle end, making it difficult to achieve good aberration correction even when an aspheric surface described later is introduced.
【００２９】条件式（２）の下限値を越えると望遠端に
おいて、物体距離が変化したときの球面収差の変動が増
加し、良好な収差補正のためには、移動レンズ群の構成
枚数を増やす必要が生じてくる。If the lower limit of conditional expression (2) is exceeded, the variation of spherical aberration when the object distance changes at the telephoto end increases, and the number of moving lens groups must be increased for good aberration correction. The need arises.
【００３０】条件式（３）の下限値を越えると後述する
非球面を導入したとしても望遠端の球面収差の良好なる
補正が困難になるだけでなく、広角端からズーム中間に
かけての歪曲収差の変動（樽型から糸巻き型への変化）
が大きくなり好ましくない。If the lower limit of conditional expression (3) is exceeded, it will be difficult to satisfactorily correct spherical aberration at the telephoto end even if an aspherical surface, which will be described later, is introduced. Fluctuation (change from barrel to pincushion)
Is undesirably large.
【００３１】又、条件式（１），（２）及び（３）のい
ずれの上限値を越えると収差補正上は有利になるが前玉
径が増大し、フォーカスの際の第１２群の移動量が増大
し、大きな空間が必要になり、レンズ系全体の小型軽量
化が難しくなってくる。Exceeding any of the upper limits of the conditional expressions (1), (2) and (3) is advantageous for aberration correction, but increases the front lens diameter and moves the twelfth lens unit during focusing. The amount increases, a large space is required, and it becomes difficult to reduce the size and weight of the entire lens system.
【００３２】更に本発明では、第１２群と第１３群に非
球面を導入することにより広画角化をはかりつつ、全変
倍範囲にわたり画面全体の光学性能を良好に維持してい
る。Further, in the present invention, by introducing an aspherical surface into the twelfth and thirteenth units, the optical performance of the entire screen is favorably maintained over the entire zoom range while widening the angle of view.
【００３３】第１２群に施す非球面は軸上光束の最大入
射高をｈＴ、広角端での最大画角の軸外光束の最大入射
高をｈＷとしたとき、ｈＷ＞ｈＴを満足する少なくとも
１つのレンズ面に、正の屈折面に施した場合はレンズ周
辺に行くに従い正の屈折力が強くなるが非球面、負の屈
折面に施した場合はレンズ周辺に行くに従い負の屈折力
が弱くなる形状の非球面を施している。The aspherical surface applied to the twelfth lens group has at least one that satisfies hW> hT, where hT is the maximum incident height of the on-axis light beam and hW is the maximum incident height of the off-axis light beam having the maximum angle of view at the wide-angle end. On one lens surface, when applied to the positive refraction surface, the positive refractive power increases as it goes to the periphery of the lens, but when applied to the aspherical surface, the negative refraction power decreases as it goes to the periphery of the lens. It has an aspherical shape.
【００３４】この非球面により広角端で増大する負の歪
曲収差を軽減している。又第１３群に施す非球面は、正
の屈折面に施した場合はレンズ周辺に行くに従い正の屈
折力が弱くなる非球面、負の屈折面に施した場合はレン
ズ周辺に行くに従い負の屈折力が強くなる形状の非球面
とするのが良い。これにより望遠端における球面収差を
良好に補正している。又、広角端からズーム中間へズー
ムした時に歪曲収差が負から正へ大きく変化するのを軽
減している。The aspherical surface reduces negative distortion that increases at the wide-angle end. The aspheric surface applied to the 13th lens unit is such that when applied to the positive refractive surface, the positive refractive power becomes weaker toward the periphery of the lens, and when applied to the negative refractive surface, the negative aspheric surface becomes closer to the lens. It is preferable to use an aspherical surface having a shape having a high refractive power. As a result, spherical aberration at the telephoto end is favorably corrected. Also, when zooming from the wide-angle end to the middle of the zoom, distortion is prevented from greatly changing from negative to positive.
【００３５】本発明に係るインナーフォーカス式を用い
たズームレンズは以上の諸条件を満足することにより達
成されるが、更に物体距離全般にわたり、かつ全変倍範
囲にわたり良好なる光学性能を得るには次の諸条件のう
ちの少なくとも１つを満足させるのが良い。The zoom lens using the inner focus type according to the present invention can be achieved by satisfying the above conditions. However, in order to obtain good optical performance over the entire object distance and over the entire zoom range. It is preferable to satisfy at least one of the following conditions.
【００３６】（ア−１）前記第１２群は１つの正の第１
２ｐレンズを有しており、該正の第１２ｐレンズの材質
の屈折力をＮ１２ｐとし、前記第１３群は１つの負の第
１３ｎレンズを有しており、該負の第１３ｎレンズの材
質の屈折力をＮ１３ｎとし、広角端における前記第２群
の横倍率をβＶＷとしたとき Ｎ１２ｐ≦１．６７ ‥‥‥（４） １．７６≦Ｎ１３ｎ ‥‥‥（５） −０．４≦βＶＷ≦−０．２ ‥‥‥（６） を満足することである。(A-1) The twelfth lens group has one positive first lens.
The positive 12p lens has a refractive power of N12p, and the 13th group has one negative 13n lens. The negative 13n lens has a negative 13n lens. When the refractive power is N13n and the lateral magnification of the second lens unit at the wide-angle end is βVW, N12p ≦ 1.67 ‥‥‥ (4) 1.76 ≦ N13n ‥‥‥ (5) −0.4 ≦ βVW ≦ −0.2 ‥‥‥ (6).
【００３７】条件式（４）を外れて第１２群の正の第１
２ｐレンズの材質の屈折率が高くなると、該第１２ｐレ
ンズの曲率が小さくなり、非球面を導入しても広角端で
の負の歪曲収差の補正が困難になり、又正のペッツバー
ル和が減少し、第２群で発生する負のペッツバール和を
補正するのが困難になる。Deviating from conditional expression (4), the positive first
As the refractive index of the material of the 2p lens increases, the curvature of the twelfth lens decreases, making it difficult to correct negative distortion at the wide-angle end even if an aspheric surface is introduced, and reducing the positive Petzval sum. However, it becomes difficult to correct the negative Petzval sum generated in the second lens unit.
【００３８】条件式（５）は望遠端における球面収差の
補正に関する式で、下限を超えて負の第１３ｎレンズの
材質の屈折率が低くなると良好な球面収差の補正が困難
になる。Conditional expression (5) relates to correction of spherical aberration at the telephoto end. If the refractive index of the material of the negative 13n lens becomes lower than the lower limit, it becomes difficult to properly correct spherical aberration.
【００３９】条件式（６）は前玉に対する第２群以降の
パワーを規定する条件式であり、下限を超えると収差補
正上は有利になるが、高変倍比の達成が困難になり、上
限を超えると小型化、高変倍比化には有利であるが、収
差補正上の困難さが増大してしまうので良くない。Conditional expression (6) is a conditional expression for defining the power of the second lens unit and thereafter with respect to the front lens. If the lower limit is exceeded, it is advantageous for aberration correction, but it is difficult to achieve a high zoom ratio. Exceeding the upper limit is advantageous for reducing the size and increasing the zoom ratio, but is not preferable because the difficulty in correcting aberrations increases.
【００４０】（ア−２） 物体側より順に前記第１１群
は物体側へ凸面を向けたメニスカス状の少なくとも１つ
の負レンズ、両レンズ面が凹面の負レンズ、そして物体
側へ凸面を向けた正レンズを有していることである。(A-2) In order from the object side, the eleventh unit has at least one negative meniscus lens having a convex surface facing the object side, a negative lens having both lens surfaces concave, and a convex surface facing the object side. It has a positive lens.
【００４１】（ア−３） 物体側より順に前記第１２群
は像面側に凸面を向けた正レンズより成り、又は像面側
に凸面を向けた正レンズ、正レンズと負レンズとの接合
レンズより成り、又は２つの正レンズと負レンズと正レ
ンズとの接合レンズより成っていることである。(A-3) In order from the object side, the twelfth lens unit comprises a positive lens having a convex surface facing the image surface side, or a positive lens having a convex surface facing the image surface side, and a cemented lens comprising a positive lens and a negative lens. Lens, or a cemented lens of two positive lenses, a negative lens, and a positive lens.
【００４２】（ア−４） 物体側より順に前記第３群は
正レンズと負レンズとの接合レンズ、負レンズと正レン
ズとの接合レンズ、そして正レンズより成り、又は負レ
ンズと正レンズとの接合レンズ、そして正レンズより成
り、又は負レンズと正レンズとの接合レンズ、正レンズ
そして正レンズより成っていることである。(A-4) In order from the object side, the third unit is composed of a cemented lens of a positive lens and a negative lens, a cemented lens of a negative lens and a positive lens, and a positive lens, or a negative lens and a positive lens. Or a cemented lens of a negative lens and a positive lens, or a cemented lens of a negative lens and a positive lens, a positive lens and a positive lens.
【００４３】（ア−５）第１２群の非球面と第１３群の
非球面に加えて、第２群Ｖ中のレンズ面に、正の屈折面
に施した場合はレンズ周辺に行くに従い正の屈折力が強
くなる非球面、負の屈折面に施した場合はレンズ周辺に
行くに従い負の屈折力が弱くなる形状の非球面を導入
し、組み合わせるのが良い。これによれば広角端の負の
歪曲収差と望遠端での球面収差の変動巾をより一層軽減
することができる。(A-5) In addition to the aspherical surface of the twelfth lens group and the aspherical surface of the thirteenth lens group, if a positive refracting surface is applied to the lens surface in the second lens unit V, the positive lens moves toward the lens periphery. It is preferable to introduce and combine an aspheric surface having a strong refractive power, and an aspheric surface having a shape in which the negative refractive power becomes weaker toward the periphery of the lens when applied to a negative refractive surface. According to this, the fluctuation range of the negative distortion at the wide-angle end and the spherical aberration at the telephoto end can be further reduced.
【００４４】次に前述の各実施例の特徴について説明す
る。Next, the features of the above embodiments will be described.
【００４５】（実施例１）第１２群を正の単レンズで構
成している。そして第１２群，第１３群共正のパワー
（屈折力）のレンズ面に非球面を導入している。(Embodiment 1) The twelfth group is composed of a positive single lens. In the twelfth and thirteenth groups, an aspheric surface is introduced on the lens surface having a positive power (refractive power).
【００４６】（実施例２）第１２群を正の単レンズと正
レンズと負レンズの張り合わせレンズで構成し、第１２
群の非球面は張り合わせレンズの負のパワーの面に、第
１３群の負のパワーの面に非球面を導入している。(Embodiment 2) The twelfth unit is composed of a single positive lens, and a cemented lens of a positive lens and a negative lens.
The aspherical surface of the group introduces an aspherical surface to the negative power surface of the cemented lens and the negative power surface of the thirteenth group.
【００４７】（実施例３）ズーム比１５倍の広角で高倍
率のズームレンズである。第１２群，第１３群共に正の
パワーの面に非球面を導入している。(Embodiment 3) A wide-angle and high-magnification zoom lens having a zoom ratio of 15 is provided. Both the twelfth and thirteenth groups introduce an aspherical surface into the surface of positive power.
【００４８】次に本発明の数値実施例を示す。数値実施
例においてｒｉは物体側より順に第ｉ番目のレンズ面の
曲率半径、ｄｉは物体側より順に第ｉ番目のレンズ厚及
び空気間隔、ｎｉとνｉは各々各物体面側より第ｉ番目
のレンズのガラスの屈折率とアッベ数である。Next, numerical examples of the present invention will be described. In the numerical examples, ri is the radius of curvature of the i-th lens surface in order from the object side, di is the i-th lens thickness and air space in order from the object side, and ni and νi are the i-th lens surfaces from each object surface side. The refractive index and Abbe number of the glass of the lens.
【００４９】非球面形状は光軸方向にＸ軸、光軸と垂直
方向にＨ軸、光の進行方向を正とし、Ｒを近軸曲率半
径、Ａ，Ｂ，Ｃ，Ｄ，Ｅを各々非球面係数としたときThe aspheric surface has an X-axis in the optical axis direction, an H-axis in a direction perpendicular to the optical axis, a positive traveling direction of light, R represents a paraxial radius of curvature, and A, B, C, D, and E represent aspherical shapes. Spherical coefficient
【００５０】[0050]
【数１】 (Equation 1)
【００５１】なる式で表している。又前述の各条件式と
数値実施例における諸数値との関係を表−１に示す。This is represented by the following equation. Table 1 shows the relationship between the above-described conditional expressions and various numerical values in the numerical examples.
【００５２】[0052]
【外１】 [Outside 1]
【００５３】[0053]
【外２】 [Outside 2]
【００５４】[0054]
【外３】 [Outside 3]
【００５５】[0055]
【外４】 [Outside 4]
【００５６】[0056]
【外５】 [Outside 5]
【００５７】[0057]
【外６】 [Outside 6]
【００５８】[0058]
【表１】 [Table 1]
【００５９】[0059]
【発明の効果】本発明によれば以上のように、４群ズー
ムレンズを高瀬するフォーカス用の第１群の一部のレン
ズ群を光軸上移動させてフォーカスを行うインナーフォ
ーカスを採用しつつ、広画角化及び至近物体距離の短
縮、及び高変倍化を図るとともに、レンズ系全体の小型
化を図りつつ広角端の負の歪曲収差がよく補正された高
い光学性能のズームレンズを達成することができる。As described above, according to the present invention, the inner focus is achieved by moving a part of the first lens group for focusing, which moves the four-unit zoom lens, on the optical axis to perform focusing. Achieved a zoom lens with high optical performance that has a wide field angle, a short object distance, a high zoom ratio, and a small overall lens system, with well-corrected negative distortion at the wide-angle end. can do.
【図１】本発明の数値実施例１の広角端のレンズ断面図FIG. 1 is a sectional view of a lens at a wide angle end according to Numerical Embodiment 1 of the present invention.
【図２】本発明の数値実施例１のｆ＝５．７２で無限遠
物体での収差図FIG. 2 is an aberration diagram for an object at infinity at f = 5.72 in Numerical Example 1 of the present invention.
【図３】本発明の数値実施例１のｆ＝２２．８８で無限
遠物体での収差図FIG. 3 is an aberration diagram for an object at infinity at f = 22.88 in Numerical Example 1 of the present invention.
【図４】本発明の数値実施例１のｆ＝４５．７７で無限
遠物体での収差図FIG. 4 is an aberration diagram for an object at infinity at f = 45.77 in Numerical Example 1 of the present invention.
【図５】本発明の数値実施例１のｆ＝４５．７７で至近
距離物体での収差図FIG. 5 is an aberration diagram for a close object at f = 45.77 in Numerical Example 1 of the present invention.
【図６】本発明の数値実施例２の広角端のレンズ断面図FIG. 6 is a sectional view of a lens at a wide-angle end according to a second numerical embodiment of the present invention.
【図７】本発明の数値実施例２のｆ＝５．７２で無限遠
物体での収差図FIG. 7 is an aberration diagram for an object at infinity at f = 5.72 in Numerical Example 2 of the present invention.
【図８】本発明の数値実施例２のｆ＝２２．８８で無限
遠物体での収差図FIG. 8 is an aberration diagram for an object at infinity at f = 22.88 in Numerical Example 2 of the present invention.
【図９】本発明の数値実施例２のｆ＝４５．７７で無限
遠物体での収差図FIG. 9 is an aberration diagram for an object at infinity at f = 45.77 in Numerical Example 2 of the present invention.
【図１０】本発明の数値実施例２のｆ＝４５．７７で至
近距離物体での収差図FIG. 10 is an aberration diagram for a close object at f = 45.77 in Numerical Example 2 of the present invention.
【図１１】本発明の数値実施例３の広角端のレンズ断面
図FIG. 11 is a sectional view of a lens at a wide angle end according to Numerical Embodiment 3 of the present invention.
【図１２】本発明の数値実施例３のｆ＝６．７で無限遠
物体での収差図FIG. 12 is an aberration diagram for an object at infinity at f = 6.7 in Numerical Example 3 of the present invention.
【図１３】本発明の数値実施例３のｆ＝２６．６３で無
限遠物体での収差図FIG. 13 is an aberration diagram for an object at infinity at f = 26.63 in Numerical Example 3 of the present invention.
【図１４】本発明の数値実施例１のｆ＝９９．８３で無
限遠物体での収差図FIG. 14 is an aberration diagram for an object at infinity at f = 99.83 in Numerical Example 1 of the present invention.
【図１５】本発明の数値実施例１のｆ＝９９．８３で至
近距離物体での収差図FIG. 15 is an aberration diagram for a close object at f = 99.83 in Numerical Example 1 of the present invention.
Ｆ 第１群 Ｆ１１ 第１１群 Ｆ１２ 第１２群 Ｆ１３ 第１３群 Ｖ 第２群 Ｃ 第３群 Ｒ 第４群 ＳＰ 開口絞り Ｇ 色分解プリズム及び光学フィルター等 ｅ ｅ線 ΔＳ サジタル像面 ΔＭ メリディオナル像面 F 1st group F11 11th group F12 12th group F13 13th group V 2nd group C 3rd group R 4th group SP Aperture stop G Color separation prism, optical filter, etc. ee line ΔS Sagittal image plane ΔM Meridional image plane
フロントページの続き Ｆターム(参考） 2H087 KA02 KA03 MA18 PA15 PA16 PB20 QA02 QA05 QA17 QA22 QA25 QA26 QA33 QA41 QA46 RA05 RA12 RA13 RA32 RA41 RA43 SA23 SA27 SA29 SA30 SA32 SA63 SA64 SA72 SA75 SB01 SB15 SB23 SB25 SB31Continued on the front page F term (reference) 2H087 KA02 KA03 MA18 PA15 PA16 PB20 QA02 QA05 QA17 QA22 QA25 QA26 QA33 QA41 QA46 RA05 RA12 RA13 RA32 RA41 RA43 SA23 SA27 SA29 SA30 SA32 SA63 SA64 SA72 SA75 SB01 SB15 SB23 SB25 SB31
Claims (5)
倍用の負の屈折力の第２群、変倍に伴う像面変動を補正
する正又は負の屈折力の第３群、開口絞り、そして変倍
中固定の結像作用を有する第４群とを有したズームレン
ズにおいて、該第２群は変倍の際に結像倍率が−１倍を
含む領域内で変化し、該第１群は合焦時に固定で負の屈
折力の第１１群と、合焦時に光軸に沿って移動する第１
２群と、合焦時固定の正の屈折力の第１３群を有し、第
１１群の焦点距離をｆ１１、第１２群の焦点距離をｆ１
２、第１３群の焦点距離をｆ１３、第１群の焦点距離を
ｆ１としたとき １．２≦｜ｆ１１／ｆ１｜≦１．７ ４．０≦ｆ１２／ｆ１≦７．０ １．１≦ｆ１３／ｆ１≦１．７ を満足し、更に第１２群中、軸上光束の最大入射高をｈ
Ｔ、広角端での最大画角の軸外光束の最大入射高をｈＷ
としたとき、ｈＷ＞ｈＴを満足する少なくとも１つのレ
ンズ面に、正の屈折面に施した場合はレンズ周辺に行く
に従い正の屈折力が強くなる非球面又は負の屈折面に施
した場合はレンズ周辺に行くに従い負の屈折力が弱くな
る形状の非球面を有し、かつ第１３群には、正の屈折面
に施した場合はレンズ周辺に行くに従い正の屈折力が弱
くなる非球面又は負の屈折面に施した場合はレンズ周辺
に行くに従い負の屈折力が強くなる形状の非球面を少な
くとも１面有することを特徴とするズームレンズ。1. A first lens unit having a positive refractive power, a second lens unit having a negative refractive power for zooming, and a third lens having a positive or negative refractive power for correcting an image plane variation caused by zooming, in order from the object side. A zoom lens having a lens unit, an aperture stop, and a fourth lens unit having a fixed imaging function during zooming, wherein the second lens unit changes in an area including an imaging magnification of -1 upon zooming. The first lens group is fixed at the time of focusing and has a negative refractive power, and the first lens group moves along the optical axis at the time of focusing.
It has two groups and a thirteenth group having a positive refractive power fixed at the time of focusing. The focal length of the eleventh group is f11, and the focal length of the twelfth group is f1.
2. When the focal length of the 13th lens group is f13 and the focal length of the first lens group is f1 1.2 ≦ | f11 / f1 | ≦ 1.7 4.0 ≦ f12 / f1 ≦ 7.0 1.1 ≦ f13 / f1 ≦ 1.7, and in the twelfth lens group, the maximum incident height of the on-axis light flux is h
T, the maximum incident height of the off-axis luminous flux having the maximum angle of view at the wide-angle end is hW
When applied to at least one lens surface that satisfies hW> hT, when applied to a positive refractive surface, applied to an aspherical surface or a negative refractive surface where the positive refractive power becomes stronger toward the periphery of the lens. The thirteenth lens group has an aspheric surface whose positive refractive power becomes weaker toward the lens periphery when applied to a positive refractive surface. A zoom lens having at least one aspherical surface having a shape in which negative refractive power becomes stronger toward the periphery of the lens when applied to a negative refractive surface.
ズを有しており、該正の第１２ｐレンズの材質の屈折力
をＮ１２ｐとし、前記第１３群は１つの負の第１３ｎレ
ンズを有しており、該負の第１３ｎレンズの材質の屈折
力をＮ１３ｎとし、広角端における前記第２群の横倍率
をβＶＷとしたとき Ｎ１２ｐ≦１．６７ １．７６≦Ｎ１３ｎ −０．４≦βＶＷ≦−０．２ を満足することを特徴とする請求項１記載のズームレン
ズ。2. The twelfth group has one positive twelfth lens, the material of the positive twelfth lens is N12p, and the thirteenth group is one negative twelfth lens. N12p ≦ 1.67 1.76 ≦ N13n−0.4, where N13n is the refractive power of the material of the negative 13th lens and βVW is the lateral magnification of the second group at the wide-angle end. The zoom lens according to claim 1, wherein satisfies?? VW? -0.2.
凸面を向けたメニスカス状の少なくとも１つの負レン
ズ、両レンズ面が凹面の負レンズ、そして物体側へ凸面
を向けた正レンズを有していることを特徴とする請求項
１又は２のズームレンズ。3. The eleventh group includes, in order from the object side, at least one meniscus negative lens having a convex surface facing the object side, a negative lens having both lens surfaces concave, and a positive lens having a convex surface facing the object side. The zoom lens according to claim 1, further comprising: a zoom lens.
凸面を向けた正レンズより成り、又は像面側に凸面を向
けた正レンズ、正レンズと負レンズとの接合レンズより
成り、又は２つの正レンズと負レンズと正レンズとの接
合レンズより成っていることを特徴とする請求項１，２
又は３のズームレンズ。4. The twelfth lens unit includes, in order from the object side, a positive lens having a convex surface facing the image surface side, or a positive lens having a convex surface facing the image surface side, or a cemented lens of a positive lens and a negative lens. And a cemented lens of two positive lenses, a negative lens and a positive lens.
Or 3 zoom lenses.
負レンズとの接合レンズ、負レンズと正レンズとの接合
レンズ、そして正レンズより成り、又は負レンズと正レ
ンズとの接合レンズ、そして正レンズより成り、又は負
レンズと正レンズとの接合レンズ、正レンズそして正レ
ンズより成っていることを特徴とする請求項１，２，３
又は４のズームレンズ。5. The third unit, in order from the object side, comprises a cemented lens of a positive lens and a negative lens, a cemented lens of a negative lens and a positive lens, and a positive lens, or a cemented lens of a negative lens and a positive lens. And a positive lens, or a cemented lens of a negative lens and a positive lens, a positive lens, and a positive lens.
Or 4 zoom lenses.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19151499A JP4478247B2 (en) | 1999-07-06 | 1999-07-06 | Zoom lens |
| US09/562,933 US6545818B2 (en) | 1999-05-10 | 2000-05-02 | Zoom lens and camera system |
| DE60033989T DE60033989T2 (en) | 1999-05-10 | 2000-05-08 | zoom lens |
| EP00303851A EP1052535B1 (en) | 1999-05-10 | 2000-05-08 | Zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19151499A JP4478247B2 (en) | 1999-07-06 | 1999-07-06 | Zoom lens |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2001021804A true JP2001021804A (en) | 2001-01-26 |
| JP2001021804A5 JP2001021804A5 (en) | 2006-08-17 |
| JP4478247B2 JP4478247B2 (en) | 2010-06-09 |
Family
ID=16275931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19151499A Expired - Lifetime JP4478247B2 (en) | 1999-05-10 | 1999-07-06 | Zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4478247B2 (en) |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005292605A (en) * | 2004-04-01 | 2005-10-20 | Canon Inc | Zoom lens and photographing system |
| JP2009037037A (en) * | 2007-08-02 | 2009-02-19 | Canon Inc | Zoom lens and image pickup device having it |
| JP2009042346A (en) * | 2007-08-07 | 2009-02-26 | Canon Inc | Zoom lens and imaging apparatus having the same |
| EP2124083A1 (en) * | 2008-05-21 | 2009-11-25 | Canon Kabushiki Kaisha | Telephoto-type zoom lens comprising four lens groups |
| EP2124084A1 (en) * | 2008-05-21 | 2009-11-25 | Canon Kabushiki Kaisha | Vibration-proof telephoto zoom lens having four lens groups |
| JP2009282200A (en) * | 2008-05-21 | 2009-12-03 | Canon Inc | Zoom lens and imaging apparatus having the same |
| JP2009282202A (en) * | 2008-05-21 | 2009-12-03 | Canon Inc | Zoom lens and imaging device having same |
| JP2010175902A (en) * | 2009-01-30 | 2010-08-12 | Nikon Corp | Variable power optical system, optical equipment having the variable power optical system, and method for manufacturing variable power optical system |
| JP2010175899A (en) * | 2009-01-30 | 2010-08-12 | Nikon Corp | Variable power optical system, optical device including the variable power optical system, and method for manufacturing the variable power optical system |
| JP2011039398A (en) * | 2009-08-17 | 2011-02-24 | Canon Inc | Zoom lens and image pickup apparatus equipped with same |
| JP2012013817A (en) * | 2010-06-30 | 2012-01-19 | Canon Inc | Zoom lens and imaging device provided with the same |
| WO2013065288A1 (en) * | 2011-11-04 | 2013-05-10 | 富士フイルム株式会社 | Zoom lens and imaging device |
| JP5616534B2 (en) * | 2011-11-04 | 2014-10-29 | 富士フイルム株式会社 | Zoom lens and imaging device |
| US8922906B2 (en) | 2011-09-16 | 2014-12-30 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| US9104017B2 (en) | 2013-04-30 | 2015-08-11 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
| JP2015176129A (en) * | 2014-03-18 | 2015-10-05 | キヤノン株式会社 | Zoom lens and image capturing system having the same |
| US9195035B2 (en) | 2012-07-25 | 2015-11-24 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
| US9279968B2 (en) | 2011-11-04 | 2016-03-08 | Samsung Electronics Co., Ltd. | Zoom lens and photographing apparatus including the same |
| US9402031B2 (en) | 2013-08-08 | 2016-07-26 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus having the same |
| JP2016184136A (en) * | 2015-03-27 | 2016-10-20 | 株式会社シグマ | Fish-eye lens |
| WO2017158899A1 (en) * | 2016-03-16 | 2017-09-21 | 富士フイルム株式会社 | Zoom lens and imaging device |
| JP2021103218A (en) * | 2019-12-25 | 2021-07-15 | キヤノン株式会社 | Zoom lens and imaging apparatus |
| CN113472976A (en) * | 2018-10-16 | 2021-10-01 | 华为技术有限公司 | Microspur imaging method and terminal |
| CN114114622A (en) * | 2021-11-30 | 2022-03-01 | 湖南长步道光学科技有限公司 | High-definition zoom telecentric industrial lens |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6129766B2 (en) | 2014-02-26 | 2017-05-17 | 富士フイルム株式会社 | Zoom lens and imaging device |
-
1999
- 1999-07-06 JP JP19151499A patent/JP4478247B2/en not_active Expired - Lifetime
Cited By (42)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4579568B2 (en) * | 2004-04-01 | 2010-11-10 | キヤノン株式会社 | Zoom lens and shooting system |
| JP2005292605A (en) * | 2004-04-01 | 2005-10-20 | Canon Inc | Zoom lens and photographing system |
| JP2009037037A (en) * | 2007-08-02 | 2009-02-19 | Canon Inc | Zoom lens and image pickup device having it |
| US7630145B2 (en) | 2007-08-07 | 2009-12-08 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus |
| JP2009042346A (en) * | 2007-08-07 | 2009-02-26 | Canon Inc | Zoom lens and imaging apparatus having the same |
| EP2124084A1 (en) * | 2008-05-21 | 2009-11-25 | Canon Kabushiki Kaisha | Vibration-proof telephoto zoom lens having four lens groups |
| JP2009282201A (en) * | 2008-05-21 | 2009-12-03 | Canon Inc | Zoom lens system and camera including the same |
| JP2009282199A (en) * | 2008-05-21 | 2009-12-03 | Canon Inc | Zoom lens and imaging apparatus having the same |
| JP2009282202A (en) * | 2008-05-21 | 2009-12-03 | Canon Inc | Zoom lens and imaging device having same |
| JP2009282200A (en) * | 2008-05-21 | 2009-12-03 | Canon Inc | Zoom lens and imaging apparatus having the same |
| EP2124083A1 (en) * | 2008-05-21 | 2009-11-25 | Canon Kabushiki Kaisha | Telephoto-type zoom lens comprising four lens groups |
| US7907355B2 (en) | 2008-05-21 | 2011-03-15 | Canon Kabushiki Kaisha | Zoom lens system and camera including the same |
| US7929222B2 (en) | 2008-05-21 | 2011-04-19 | Canon Kabushiki Kaisha | Zoom lens system and camera including the same |
| JP2010175902A (en) * | 2009-01-30 | 2010-08-12 | Nikon Corp | Variable power optical system, optical equipment having the variable power optical system, and method for manufacturing variable power optical system |
| JP2010175899A (en) * | 2009-01-30 | 2010-08-12 | Nikon Corp | Variable power optical system, optical device including the variable power optical system, and method for manufacturing the variable power optical system |
| JP2011039398A (en) * | 2009-08-17 | 2011-02-24 | Canon Inc | Zoom lens and image pickup apparatus equipped with same |
| JP2012013817A (en) * | 2010-06-30 | 2012-01-19 | Canon Inc | Zoom lens and imaging device provided with the same |
| US8922906B2 (en) | 2011-09-16 | 2014-12-30 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| JPWO2013038614A1 (en) * | 2011-09-16 | 2015-03-23 | 富士フイルム株式会社 | Zoom lens and imaging device |
| CN103917911A (en) * | 2011-11-04 | 2014-07-09 | 富士胶片株式会社 | Zoom lens and imaging device |
| JP5616534B2 (en) * | 2011-11-04 | 2014-10-29 | 富士フイルム株式会社 | Zoom lens and imaging device |
| WO2013065288A1 (en) * | 2011-11-04 | 2013-05-10 | 富士フイルム株式会社 | Zoom lens and imaging device |
| JPWO2013065299A1 (en) * | 2011-11-04 | 2015-04-02 | 富士フイルム株式会社 | Zoom lens and imaging device |
| US9025255B2 (en) | 2011-11-04 | 2015-05-05 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| US9279968B2 (en) | 2011-11-04 | 2016-03-08 | Samsung Electronics Co., Ltd. | Zoom lens and photographing apparatus including the same |
| CN103917911B (en) * | 2011-11-04 | 2016-03-30 | 富士胶片株式会社 | Zoom lens and camera head |
| US9195035B2 (en) | 2012-07-25 | 2015-11-24 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
| US9104017B2 (en) | 2013-04-30 | 2015-08-11 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
| US9402031B2 (en) | 2013-08-08 | 2016-07-26 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus having the same |
| JP2015176129A (en) * | 2014-03-18 | 2015-10-05 | キヤノン株式会社 | Zoom lens and image capturing system having the same |
| JP2016184136A (en) * | 2015-03-27 | 2016-10-20 | 株式会社シグマ | Fish-eye lens |
| WO2017158899A1 (en) * | 2016-03-16 | 2017-09-21 | 富士フイルム株式会社 | Zoom lens and imaging device |
| JPWO2017158899A1 (en) * | 2016-03-16 | 2018-09-27 | 富士フイルム株式会社 | Zoom lens and imaging device |
| US10838181B2 (en) | 2016-03-16 | 2020-11-17 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| CN113472976A (en) * | 2018-10-16 | 2021-10-01 | 华为技术有限公司 | Microspur imaging method and terminal |
| US11405538B2 (en) | 2018-10-16 | 2022-08-02 | Huawei Technologies Co., Ltd. | Macro imaging method and terminal |
| CN113472976B (en) * | 2018-10-16 | 2022-11-25 | 华为技术有限公司 | Microspur imaging method and terminal |
| US11683574B2 (en) | 2018-10-16 | 2023-06-20 | Huawei Technologies Co., Ltd. | Macro imaging method and terminal |
| JP2021103218A (en) * | 2019-12-25 | 2021-07-15 | キヤノン株式会社 | Zoom lens and imaging apparatus |
| JP7387425B2 (en) | 2019-12-25 | 2023-11-28 | キヤノン株式会社 | Zoom lenses and imaging devices |
| CN114114622A (en) * | 2021-11-30 | 2022-03-01 | 湖南长步道光学科技有限公司 | High-definition zoom telecentric industrial lens |
| CN114114622B (en) * | 2021-11-30 | 2023-08-29 | 湖南长步道光学科技有限公司 | High-definition zoom telecentric industrial lens |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4478247B2 (en) | 2010-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4478247B2 (en) | Zoom lens | |
| JP3445095B2 (en) | Zoom lens and camera having the same | |
| JP2000284177A (en) | Three-group zoom lens | |
| JPH1062686A (en) | Inner focusing type zoom lens | |
| JPH11160620A (en) | Zoom lens | |
| JP2001116993A (en) | Zoom lens | |
| JP4593971B2 (en) | Zoom lens and imaging apparatus having the same | |
| JP2001033703A (en) | Rear focus type zoom lens | |
| JP4829629B2 (en) | Zoom lens and imaging apparatus having the same | |
| JP3619117B2 (en) | Zoom lens and optical apparatus using the same | |
| JP4847091B2 (en) | Zoom lens and imaging apparatus having the same | |
| JP2002311330A (en) | Zoom lens and optical apparatus using the same | |
| JPH08190051A (en) | Rear focus type zoom lens | |
| JP4401469B2 (en) | Zoom lens | |
| JP2000180722A (en) | Rear focusing type zoom lens | |
| JP3826061B2 (en) | Zoom lens and optical apparatus having the same | |
| JP3526177B2 (en) | Zoom lens | |
| JP3619153B2 (en) | Zoom lens and optical apparatus using the same | |
| JPH1048521A (en) | Zoom lens | |
| JP3672829B2 (en) | High magnification zoom lens | |
| JP4072276B2 (en) | Zoom lens | |
| JPH11101941A (en) | Rear focus type zoom lens | |
| JPH08110470A (en) | Wide angle zoom lens | |
| JP4011786B2 (en) | Rear focus zoom lens | |
| JP3593400B2 (en) | Rear focus zoom lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060703 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20060703 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20090806 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090901 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20091028 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20091208 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100208 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20100309 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20100315 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 4478247 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130319 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140319 Year of fee payment: 4 |
|
| EXPY | Cancellation because of completion of term |