JP2003241096A - Zoom lens - Google Patents
Zoom lensInfo
- Publication number
- JP2003241096A JP2003241096A JP2002039425A JP2002039425A JP2003241096A JP 2003241096 A JP2003241096 A JP 2003241096A JP 2002039425 A JP2002039425 A JP 2002039425A JP 2002039425 A JP2002039425 A JP 2002039425A JP 2003241096 A JP2003241096 A JP 2003241096A
- Authority
- JP
- Japan
- Prior art keywords
- lens group
- lens
- refractive power
- distance
- zoom
- 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
- G02B15/16—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/17—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +--
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adjustment Of Camera Lenses (AREA)
- Lens Barrels (AREA)
- Lenses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は防振機能を備えたズ
ームレンズに関し、特にフイルム写真用カメラ、デジタ
ルカメラや、ビデオカメラなどに使用されるズームレン
ズの防振機能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 having an image stabilizing function, and more particularly to an image stabilizing function of a zoom lens used in a film photographic camera, a digital camera, a video camera or the like.
【０００２】[0002]
【従来の技術】従来より、防振機能を備えたズームレン
ズにおいては、たとえば特開平１１−３１６３４２号公
報に開示されるように、変倍の際には、変倍に用いるレ
ンズ群を多群で構成してレンズ全長を移動させ、手振れ
などに起因する像位置の変動を補正する際には、一部の
レンズ群を光軸と直行方向に移動させて補正していた。2. Description of the Related Art Conventionally, in a zoom lens having an image stabilizing function, as disclosed in, for example, Japanese Patent Application Laid-Open No. 11-316342, at the time of zooming, a large number of lens groups are used for zooming. In order to correct the fluctuation of the image position due to camera shake and the like by moving the entire lens length, a part of the lens group is moved in the direction orthogonal to the optical axis for correction.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述の
ような防振機能を備えたズームレンズでは、ズームレン
ズ群が多群で構成されるために機構が複雑になる問題点
があった。つまり、防振機能のための手振れ検出機構や
防振機構などの構成部品の配置に制限を課せなければな
らなかった。However, in the zoom lens having the image stabilizing function as described above, there is a problem that the mechanism becomes complicated because the zoom lens group is composed of a large number of groups. In other words, it has been necessary to impose restrictions on the arrangement of components such as the camera shake detection mechanism and the image stabilization mechanism for the image stabilization function.
【０００４】本発明は、前述の課題に鑑みてなされたも
のであり、簡易な防振機構を備えたズームレンズを提供
することを目的とする。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a zoom lens having a simple anti-vibration mechanism.
【０００５】[0005]
【課題を解決するための手段】本発明は、前述の課題を
解決するために、物体側から順に、正の屈折力を有する
第１レンズ群Ｇ１と、負の屈折力を有する第２レンズ群
Ｇ２と、負の屈折力を有する第３レンズ群Ｇ３と、正の
屈折力を有する第４レンズ群Ｇ４、正の屈折力を有する
第５レンズ群Ｇ５とを備え、広角端から望遠端への変倍
時には、該第１レンズ群Ｇ１と該第５レンズ群Ｇ５は像
面に対し固定であり、該第１レンズ群Ｇ１と該第２レン
ズ群Ｇ２との間隔は変化し、該第２レンズ群Ｇ２と該第
３レンズ群Ｇ３の間隔は変化し、該第３レンズ群Ｇ３と
該第４レンズ群Ｇ４の間隔は減少し、該第４レンズ群Ｇ
４と該第５レンズ群Ｇ５の間隔は変化する構成とした。In order to solve the above-mentioned problems, the present invention has a first lens group G1 having a positive refractive power and a second lens group having a negative refractive power in order from the object side. G2, a third lens group G3 having a negative refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power, are provided from the wide-angle end to the telephoto end. At the time of zooming, the first lens group G1 and the fifth lens group G5 are fixed with respect to the image plane, the distance between the first lens group G1 and the second lens group G2 changes, and the second lens group G1 changes. The distance between the group G2 and the third lens group G3 changes, the distance between the third lens group G3 and the fourth lens group G4 decreases, and the fourth lens group G3 decreases.
The distance between No. 4 and the fifth lens group G5 is changed.
【０００６】また、防振をするための変位手段として、
前記第４レンズ群Ｇ４を光軸とほぼ直交する方向に移動
さる構成とし、前記第１レンズ群Ｇ１は、物体側から順
に、正の屈折力を有する第１レンズ群前部ＧＬ１と、正
の屈折力を有する第１レンズ群後部ＧＬ２を有し、該第
１レンズ群後部ＧＬ２でフォーカスをする構成とした。Further, as displacement means for vibration isolation,
The fourth lens group G4 is configured to move in a direction substantially orthogonal to the optical axis, and the first lens group G1 includes, in order from the object side, a first lens group front portion GL1 having a positive refractive power and a positive lens group G1. The rear part GL2 of the first lens group having a refractive power is provided, and the rear part GL2 of the first lens group is used for focusing.
【０００７】さらに、本発明の好ましい態様によれば、
前記第２レンズ群Ｇ２の焦点距離をｆ２、前記第３レン
ズ群Ｇ３の焦点距離をｆ３としたとき、ｆ２＜ｆ３の条
件を満足する。Further, according to a preferred embodiment of the present invention,
When the focal length of the second lens group G2 is f2 and the focal length of the third lens group G3 is f3, the condition of f2 <f3 is satisfied.
【０００８】[0008]
【発明の実施の形態】本発明では、フイルム写真用カメ
ラ、デジタルカメラやビデオカメラ用のズームレンズに
適するように、物体側から順に、正の屈折力を有する第
１レンズ群Ｇ１と、負の屈折力を有する第２レンズ群Ｇ
２と、負の屈折力を有する第３レンズ群Ｇ３と、正の屈
折力を有する第４レンズ群Ｇ４と、正の屈折力を有する
第５レンズ群Ｇ５とを備え、広角端から望遠端への変倍
時には、該第１レンズ群Ｇ１と該第５レンズ群Ｇ５は像
面に対し固定であり、該第１レンズ群Ｇ１と該第２レン
ズ群Ｇ２との間隔は変化し、該第２レンズ群Ｇ２と該第
３レンズ群Ｇ３の間隔は変化し、該第３レンズ群Ｇ３と
該第４レンズ群Ｇ４の間隔は減少し、該第４レンズ群Ｇ
４と該第５レンズ群Ｇ５の間隔は変化するという基本構
成を採用している。BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a first lens group G1 having a positive refractive power and a negative lens group are sequentially arranged from the object side so as to be suitable for a zoom lens for a film photographic camera, a digital camera or a video camera. Second lens group G having refractive power
2, a third lens group G3 having a negative refractive power, a fourth lens group G4 having a positive refractive power, and a fifth lens group G5 having a positive refractive power, from the wide-angle end to the telephoto end. At the time of zooming, the first lens group G1 and the fifth lens group G5 are fixed with respect to the image plane, the distance between the first lens group G1 and the second lens group G2 changes, and the second lens group G1 changes. The distance between the lens group G2 and the third lens group G3 changes, the distance between the third lens group G3 and the fourth lens group G4 decreases, and the fourth lens group G3 decreases.
The basic configuration is adopted in which the distance between the fourth lens group G5 and the fourth lens group G5 changes.
【０００９】まず、上述の基本構成を有するズームレン
ズの特徴および利点について説明をする。First, the features and advantages of the zoom lens having the above-mentioned basic structure will be described.
【００１０】ズームレンズ群を多群で構成し、変倍の際
にレンズ全長を移動させる光学系は、短焦点側でレンズ
全長を、大幅に短くできる利点を有しているが、古典的
４群ズームのような全長固定型ズームレンズと比べ、機
構的に複雑になるなどの欠点を有する。さらに本願発明
のように、手振れなどに起因する像位置の変動を補正す
る光学系を内蔵させる場合、補正光学系を駆動する機
構、手振れ検出機構などの付加要素があるためさらに機
構的レイアウトの制限が必要となる。コストダウンや信
頼性を確保するにはズーム光学系はシンプルであること
が望ましい。本発明は、第１レンズ群Ｇ１と最終レンズ
群が、ズームによらず像面に対して固定の構成を採用す
ることにより、機構的に簡素化を行った。また、絞りが
固定群である第５レンズ群Ｇ５内に位置するため、絞り
駆動も容易になる。さらに、前述の第１レンズ群Ｇ１内
の正の屈折力を有する第１レンズ群後部ＧＬ２でフォー
カスすることにより、複雑なカムを用いることなくイン
ナーフォーカスが可能となり、さらにフォーカス群の重
量軽減をはかることができる。An optical system having a large number of zoom lens groups and moving the entire lens length at the time of zooming has an advantage that the total lens length can be greatly shortened on the short focus side. Compared with a fixed-length fixed-type zoom lens such as a group zoom, it has drawbacks such as being mechanically complicated. Further, in the case where an optical system for correcting the fluctuation of the image position caused by camera shake is incorporated as in the present invention, there are additional elements such as a mechanism for driving the correction optical system and a camera shake detection mechanism, which further limits the mechanical layout. Is required. It is desirable that the zoom optical system be simple in order to reduce costs and ensure reliability. The present invention mechanically simplifies by adopting a configuration in which the first lens group G1 and the final lens group are fixed to the image plane regardless of zooming. Moreover, since the diaphragm is located in the fifth lens group G5 which is a fixed group, driving of the diaphragm becomes easy. Further, by focusing with the rear portion GL2 of the first lens group G1 having a positive refractive power in the first lens group G1, inner focusing becomes possible without using a complicated cam, and the weight of the focusing group is further reduced. be able to.
【００１１】以下、本発明の条件式について詳述する。
一般的に、防振補正光学系は、小型軽量であることが望
ましく、全ズーム域で防振時の光学性能の低下を極力押
さえなければならなく、特に軸外光線は光軸近傍を通過
することが望ましい。従って、絞り近傍の光学系を防振
補正光学系にすれば良いのである。本発明では、絞り近
傍の第４レンズ群Ｇ４を防振レンズ群とするため上述し
た条件を満足できる。The conditional expression of the present invention will be described in detail below.
In general, it is desirable for the image stabilization optical system to be small and lightweight, and it is necessary to suppress deterioration of optical performance during image stabilization in the entire zoom range as much as possible, and especially off-axis rays pass near the optical axis. Is desirable. Therefore, the optical system in the vicinity of the diaphragm should be the image stabilization optical system. In the present invention, since the fourth lens group G4 near the diaphragm is used as the anti-vibration lens group, the above conditions can be satisfied.
【００１２】条件式（１）は、前記第２レンズ群Ｇ２の
焦点距離をｆ２、前記第３レンズ群Ｇ３の焦点距離をｆ
３としたときの焦点距離の比を規定するための条件であ
る。条件式（１）の下限を超え、該第２レンズ群Ｇ２の
パワーが相対的に強くなると球面収差、非点収差がズー
ム全域で補正不足になり好ましくない。また、条件式
（１）の上限を超え、該第２レンズ群Ｇ２のパワーが相
対的に弱くなると、該第２レンズ群Ｇ２の有効径大きく
なり光学系が大型化するので好ましくなく、球面収差、
非点収差がズーム全域で補正過剰になる。In conditional expression (1), the focal length of the second lens group G2 is f2, and the focal length of the third lens group G3 is f.
It is a condition for defining the ratio of the focal lengths when it is set to 3. If the lower limit of conditional expression (1) is exceeded and the power of the second lens group G2 becomes relatively strong, spherical aberration and astigmatism are uncorrected over the entire zoom range, which is not preferable. If the upper limit of conditional expression (1) is exceeded and the power of the second lens group G2 becomes relatively weak, the effective diameter of the second lens group G2 becomes large and the optical system becomes large, which is not preferable. ,
Astigmatism is overcorrected over the entire zoom range.
【００１３】[0013]
【実施例】以下、本発明の各実施例を図面を用いて説明
をする。本発明のズームレンズは、物体側から順に、正
の屈折力を有する第１レンズ群Ｇ１と、負の屈折力を有
する第２レンズ群Ｇ２と、負の屈折力を有する第３レン
ズ群Ｇ３と、正の屈折力を有する第４レンズ群Ｇ４と、
正の屈折力を有する第５レンズ群Ｇ５とを備え、広角端
から望遠端への変倍時には、該第１レンズ群Ｇ１と該第
５レンズ群Ｇ５は像面に対し固定であり、該第１レンズ
群Ｇ１と該第２レンズ群Ｇ２との間隔は変化し、該第２
レンズ群Ｇ２と該第３レンズ群Ｇ３の間隔は変化し、該
第３レンズ群Ｇ３と該第４レンズ群Ｇ４の間隔は減少
し、該第４レンズ群Ｇ４と該第５レンズ群Ｇ５の間隔は
変化する。Embodiments of the present invention will be described below with reference to the drawings. The zoom lens of the present invention comprises, in order from the object side, a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, and a third lens group G3 having a negative refractive power. , A fourth lens group G4 having a positive refractive power,
A fifth lens group G5 having a positive refractive power is provided, and the first lens group G1 and the fifth lens group G5 are fixed relative to the image plane during zooming from the wide-angle end to the telephoto end. The distance between the first lens group G1 and the second lens group G2 changes,
The distance between the lens group G2 and the third lens group G3 changes, the distance between the third lens group G3 and the fourth lens group G4 decreases, and the distance between the fourth lens group G4 and the fifth lens group G5. Changes.
【００１４】また、前記第１レンズ群Ｇ１は、物体側か
ら順に、正の屈折力を有する第１レンズ群前部ＧＬ１
と、正の屈折力を有する第１レンズ群後部ＧＬ２を有
し、該第１レンズ群後部ＧＬ２でフォーカスをする。前
記第４レンズ群Ｇ４は、光軸とほぼ直交する方向に移動
さることで、像位置の変動を補正する変位手段である。
なお、前記第５レンズ群Ｇ５内に絞りを配置する。The first lens group G1 includes, in order from the object side, the first lens group front portion GL1 having a positive refractive power.
And a rear portion GL2 of the first lens group having a positive refractive power, and focusing is performed at the rear portion GL2 of the first lens group. The fourth lens group G4 is a displacement unit that moves in a direction substantially orthogonal to the optical axis to correct the fluctuation of the image position.
A diaphragm is arranged in the fifth lens group G5.
【００１５】本発明の各実施例の諸元値は、以下の通り
である。ｆは焦点距離、ＦＮＯはＦナンバー、２ωは画
角、番号は面番号で物体側からのレンズ面の順番、Ｒ
（Ｉ）はレンズ面の曲率半径、Ｄ（Ｉ）はレンズ面の間
隔、ＮＤはｄ線の屈折率、Ｖｄはアッベ数を表してい
る。The specifications of each embodiment of the present invention are as follows. f is the focal length, FNO is the F number, 2ω is the angle of view, the number is the surface number, the order of the lens surface from the object side, R
(I) is the radius of curvature of the lens surface, D (I) is the distance between the lens surfaces, ND is the d-line refractive index, and Vd is the Abbe number.
【００１６】実施例１ ｆ＝１３８.６〜３９２.２ ＦＮＯ＝５.８６ ２ω＝１７.８°〜６.２° 番号 Ｒ（Ｉ） Ｄ（Ｉ） ＮＤ Ｖｄ [ 1] ３５０.００００ ３.２０００ １.８０６１０ ４０.７ [ 2] １３２.４３００ ０.１０００ [ 3] １３２.４３００ ９.１５００ １.４９７００ ８１.６ [ 4] −３０６.８５００ ０.３５００ [ 5] ９７.２１００ ７.４０００ １.４９７００ ８１.６ [ 6] ５５１.００００ ２９.０７００ 可変間隔 [ 7] ９８.００００ ２.５０００ １.６２００４ ３６.３ [ 8] ５６.６４００ ９.２０００ １.４８７４９ ７０.４ [ 9] ８４１.７０００ ３.３９００ 可変間隔 [10] −６１９.３５００ １.８０００ １.７７２５０ ４９.６ [11] ３３.１１００ ４.９５００ １.８３４００ ３７.３ [12] ８９.５０００ ９.３７００ 可変間隔 [13] ２３３.１４００ １.２０００ １.８０６１０ ４０.７ [14] ５６.７８００ ３.０３００ [15] −５７.８５００ １.２０００ １.７７２５０ ４９.６ [16] ５７.８５００ ３.３５００ １.８４６６６ ２３.８ [17] −２５４.３０００ ５４.９３００ 可変間隔 [18] ６５.９９００ １.３０００ １.６２００４ ３６.３ [19] ３２.０９００ ８.５０００ １.４８７４９ ７０.４ [20] −８６.７５００ １１.３９００ 可変間隔 [21] −５３.８４００ １.２０００ １.７４４００ ４４.９ [22] ２８３.００００ ３.２０００ １.５４０７２ ４７.２ [23] −６７.９７００ ０.２０００ [24] ４１.４４００ ５.１５００ １.４９７００ ８１.６ [25] −５９４.２３００ ３.３７００ [26] ０.０ ４９.６５００ 絞り [27] −２３.３５００ １.２０００ １.７７２５０ ４９.６ [28] −５３.０６００ ０.２０００ [29] −５７９.４０００ ３.４０００ １.６０３４２ ３８.０ [30] −５３.０６００ ２６.９８００ [31] ０.０ 焦点距離 １３８.６２３３ ２８２.３２２０ ３９２.２１３２ バックフォーカス ４９.０６５１ ４８.９９２５ ４８.９４６５ ＦＮＯ ５.８５６５ ５.８５４２ ５.８５５７ Ｄ（ ６） ２９.０７００ ２９.０７００ ２９.０７００ Ｄ（ ９） ３.３９００ １８.９２５０ ２０.３２００ Ｄ（１２） ９.３７００ １７.９３４５ ２８.５９００ Ｄ（１７） ５４.９３００ ２５.９５８６ ７.９１３０ Ｄ（２０） １１.３９００ １６.２６１９ ２２.２５７０ ｆ１： １１６.２４２９ ｆ２： −１１４.９１２０ ｆ３： −５１.２９１５ ｆ４： ９３.４２６７ ｆ５： ４６２.７７８９ ｆ２／ｆ３＝２.２４ 防振レンズ群の移動量（ｍｍ） ０.７Example 1 f = 138.6 to 392.2 FNO = 5.86 2ω = 17.8 ° ~ 6.2 ° Number R (I) D (I) ND Vd [1] 350.0000 3.2000 1.80610 40.7 [2] 132.4300 0.1000 [3] 132.4300 9.1500 1.49700 81.6 [4] -306.8500 0.3500 [5] 97.2100 7.4000 1.49700 81.6 [6] 551.00000 29.0700 Variable interval [7] 98.0000 2.5000 1.62004 36.3 [8] 56.6400 9.2000 1.48749 70.4 [9] 841.7000 3.3900 Variable spacing [10] -619.3500 1.8000 1.77250 49.6 [11] 33.1100 4.9500 1.83400 37.3 [12] 89.5000 9.3700 Variable spacing [13] 233.1400 1.2000 1.80610 40.7 [14] 56.7800 3.0300 [15] -57.8500 1.2000 1.77250 49.6 [16] 57.8500 3.3500 1.8846 23.8 [17] -254.3000 54.9300 Variable spacing [18] 65.9900 1.3000 1.62004 36.3 [19] 32.0900 8.5000 1.48749 70.4 [20] -86.7500 11.3900 Variable spacing [21] -53.8400 1.2000 1.74400 44.9 [22] 283.0000 3.2000 1.54072 47.2 [23] -67.9700 0.200 [24] 41.4400 5.1500 1.49700 81.6 [25] -594.2300 3.3700 [26] 0.0 49.6500 aperture [27] -23.3500 1.2000 1.77250 49.6 [28] -53.0600 0.200 [29] -579.4000 3.4000 1.60342 38.0 [30] -53.0600 26.9800 [31] 0.0 Focal length 138.6623 282.3220 392.2132 Back focus 49.0651 48.9925 48.9465 FNO 5.8565 5.8542 5.8557 D (6) 29.0700 29.0700 29.0700 D (9) 3.3900 18.9250 20.3200 D (12) 9.3700 17.9345 28.5900 D (17) 54.9300 25.9586 7.9130 D (20) 11.3900 16.2619 22.2570 f1: 116.2429 f2: -114.9120 f3: -51.2915 f4: 93.4267 f5: 462.7789 f2 / f3 = 2.24 Moving amount of anti-vibration lens group (mm) 0.7
【００１７】 実施例２ ｆ＝１３９.８〜３８８.１ ＦＮＯ＝５.８３ ２ω＝１７.６°〜６.２° 番号 Ｒ（Ｉ） Ｄ（Ｉ） ＮＤ Ｖｄ [ 1] １０９.２６２０ ３.２４６８ １.７２３４２ ３８.０ [ 2] ７０.２５０８ ０.１０００ [ 3] ６９.１７００ １１.６２７０ １.４９７００ ８１.６ [ 4] ９４１０.４４９５ ０.１０００ [ 5] １３４.７２１４ ５.８２０８ １.４９７００ ８１.６ [ 6] ８９５.１６８０ １７.６４４８ 可変間隔 [ 7] ９６.８６５６ ２.４９９７ １.６２００４ ３６.３ [ 8] ５７.９８５１ ８.７４０５ １.４８７４９ ７０.４ [ 9] ４１７.５１２０ ９.１７３４ 可変間隔 [10] −９５８.３３８０ １.８５２６ １.７７２５０ ４９.６ [11] ３１.３３３７ ８.１４２４ １.８３４００ ３７.３ [12] ７９.２２５６ ３.３３１５ 可変間隔 [13] １０７.３４５４ １.４２１７ １.８０６１０ ４０.７ [14] ４５.２９１５ ３.７８２１ [15] −５０.１４１８ １.３７８９ １.７７２５０ ４９.６ [16] ５０.１４５３ ３.７５２９ １.８４６６６ ２３.８ [17] −３３４.１１８０ ４６.８９２２ 可変間隔 [18] ６２.１４０９ ２.４０８４ １.６２００４ ３６.３ [19] ２９.３５０１ ９.０５５１ １.４８７４９ ７０.４ [20] −７２.４６６４ １２.５２８５ 可変間隔 [21] −５４.１１０７ １.３３１５ １.７８５９０ ４３.９ [22] ２７１.９７３９ ３.１６９０ １.５４８１４ ４５.８ [23] −６７.８２４５ １.５０００ [24] ０.０ １.６０００ 絞り [25] ３９.２７８３ ４.７８６７ １.４９７００ ８１.６ [26] −６５１.９２４９ ４９.４３１２ [27] −２３.００４８ １.３６３１ １.７７２５０ ４９.６ [28] −４４.４６０２ ０.１０００ [29] １９４２.７１５６ ２.８００６ １.６２００４ ３６.３ [30] −７５.７０８０ ２１.９９１０ [31] ０.０ 焦点距離 １３９.７８０５ ２８４.２０７２ ３８８.１６３４ バックフォーカス ４８.４２３４ ４７.９７６０ ４８.６４００ ＦＮＯ ５.８２８９ ５.８１０３ ５.８３８３ Ｄ（ ６） １７.６４４８ １７.６４４８ １７.６４４８ Ｄ（ ９） ９.１７３４ ２０.７１８２ ２０.２９２０ Ｄ（１２） ３.３３１５ １７.１０６９ ３０.９１９６ Ｄ（１７） ４６.８９２２ １９.６１４２ ４.２５００ Ｄ（２０） １２.５２８５ １４.９７７０ １６.４４８４ ｆ１： １１０.３４ ｆ２： −１０７.２６ ｆ３： −４６.００ ｆ４： ８３.８２ ｆ５： ４２０.７４ ｆ２／ｆ３＝２.３３ 防振レンズ群の移動量（ｍｍ） ０.７[0017] Example 2 f = 139.8 to 388.1 FNO = 5.83 2ω = 17.6 ° to 6.2 ° Number R (I) D (I) ND Vd [1] 109.2620 3.2468 1.72342 38.0 [2] 70.2508 0.1000 [3] 69.1700 11.6270 1.49700 81.6 [4] 9410.4495 0.1000 [5] 134.7214 5.8208 1.49700 81.6 [6] 895.1680 17.64448 Variable spacing [7] 96.8656 2.4997 1.62004 36.3 [8] 57.9851 8.7405 1.48749 70.4 [9] 417.5120 9.1734 Variable spacing [10] -958.3380 1.8526 1.77250 49.6 [11] 31.3337 8.1424 1.83400 37.3 [12] 79.2256 3.3315 Variable spacing [13] 107.3454 1.4217 1.80610 40.7 [14] 45.2915 3.7821 [15] -50.1418 1.3789 1.77250 49.6 [16] 50.1453 3.7529 1.84666 23.8 [17] -334.1180 46.8922 Variable spacing [18] 62.1409 2.4084 1.62004 36.3 [19] 29.3501 9.0551 1.48749 70.4 [20] -72.4664 12.5285 Variable spacing [21] -54.1107 1.3315 1.78590 43.9 [22] 271.9739 3.1690 1.554814 45.8 [23] -67.8245 1.5000 [24] 0.0 1.6000 aperture [25] 39.2783 4.7867 1.49700 81.6 [26] -651.9249 49.4312 [27] -23.0048 1.3631 1.77250 49.6 [28] -44.4602 0.1000 [29] 1942.7156 2.8006 1.62004 36.3 [30] -75.7080 21.9910 [31] 0.0 Focal length 139.7805 284.2072 388.1634 Back focus 48.4234 47.9760 48.6400 FNO 5.8289 5.8103 5.8383 D (6) 17.6448 17.6448 17.6448 D (9) 9.1734 20.7182 20.2920 D (12) 3.3315 17.1069 30.9196 D (17) 46.8922 19.6142 4.2500 D (20) 12.5285 14.9770 16.4484 f1: 110.34 f2: -107.26 f3: -46.00 f4: 83.82 f5: 420.74 f2 / f3 = 2.33 Moving amount of anti-vibration lens group (mm) 0.7
【００１８】[0018]
【発明の効果】以上のように本発明によれば、簡易なレ
ンズ構成で、防振機構や手振れ検出機構などの部品配置
にゆとりのある防振機構を有したズームレンズを実現す
ることができる。As described above, according to the present invention, it is possible to realize a zoom lens having a simple lens structure and having a vibration proof mechanism that allows a sufficient arrangement of components such as a vibration proof mechanism and a camera shake detection mechanism. .
【図１】本発明の実施例１のレンズ構成図FIG. 1 is a lens configuration diagram of Example 1 of the present invention.
【図２】本発明の実施例１の非防振時における広角端の
収差図FIG. 2 is an aberration diagram at the wide-angle end when no image stabilization is performed according to the first embodiment of the present invention.
【図３】本発明の実施例１の非防振時における中間焦点
距離の収差図FIG. 3 is an aberration diagram of an intermediate focal length when not vibrating according to Example 1 of the present invention.
【図４】本発明の実施例１の非防振時における望遠端の
収差図FIG. 4 is an aberration diagram of a telephoto end according to the first embodiment of the present invention without vibration isolation.
【図５】本発明の実施例１の防振時における広角端のコ
マ収差図FIG. 5 is a coma aberration diagram at the wide-angle end during image stabilization according to the first embodiment of the present invention.
【図６】本発明の実施例１の防振時における中間焦点距
離のコマ収差図FIG. 6 is a coma aberration diagram of the intermediate focal length during image stabilization in Example 1 of the present invention.
【図７】本発明の実施例１の防振時における望遠端のコ
マ収差図FIG. 7 is a coma aberration diagram at the telephoto end during image stabilization in Example 1 of the present invention.
【図８】本発明の実施例２のレンズ構成図FIG. 8 is a lens configuration diagram of a second embodiment of the present invention.
【図９】本発明の実施例２の非防振時における広角端の
収差図FIG. 9 is an aberration diagram of a wide-angle end at the time of non-vibration of Example 2 of the present invention.
【図１０】本発明の実施例２の非防振時における中間焦
点距離の収差図FIG. 10 is an aberration diagram of an intermediate focal length in the non-vibration mode of Example 2 of the present invention.
【図１１】本発明の実施例２の非防振時における望遠端
の収差図FIG. 11 is an aberration diagram at a telephoto end during non-vibration of Example 2 of the present invention.
【図１２】本発明の実施例２の防振時における広角端の
コマ収差図FIG. 12 is a coma aberration diagram at the wide-angle end during image stabilization according to the second embodiment of the present invention.
【図１３】本発明の実施例２の防振時における中間焦点
距離のコマ収差図FIG. 13 is a coma aberration diagram of the intermediate focal length during image stabilization in Example 2 of the present invention.
【図１４】本発明の実施例２の防振時における望遠端の
コマ収差図FIG. 14 is a coma aberration diagram at the telephoto end during image stabilization in Example 2 of the present invention.
Ｇ１ 第１レンズ群 Ｇ２ 第２レンズ群 Ｇ３ 第３レンズ群 Ｇ４ 第４レンズ群 Ｇ５ 第５レンズ群 ＧＬ１ 第１レンズ群前部 ＧＬ２ 第１レンズ群後部 G1 first lens group G2 Second lens group G3 Third lens group G4 4th lens group G5 5th lens group GL1 Front of first lens group GL2 1st lens group rear part
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2H044 EF02 2H087 KA02 KA03 MA18 NA07 PA12 PA16 PB17 QA02 QA07 QA17 QA21 QA25 QA32 QA42 QA45 RA32 SA43 SA47 SA50 SA52 SA55 SA63 SA64 SA65 SA72 SA76 SB06 SB13 SB24 SB33 SB46 UA06 ─────────────────────────────────────────────────── ─── Continued front page F-term (reference) 2H044 EF02 2H087 KA02 KA03 MA18 NA07 PA12 PA16 PB17 QA02 QA07 QA17 QA21 QA25 QA32 QA42 QA45 RA32 SA43 SA47 SA50 SA52 SA55 SA63 SA64 SA65 SA72 SA76 SB06 SB13 SB24 SB33 SB46 UA06
Claims (3)
て、物体側から順に、正の屈折力を有する第１レンズ群
Ｇ１と、負の屈折力を有する第２レンズ群Ｇ２と、負の
屈折力を有する第３レンズ群Ｇ３と、正の屈折力を有す
る第４レンズ群Ｇ４と、正の屈折力を有する第５レンズ
群Ｇ５とを備え、広角端から望遠端への変倍時には、該
第１レンズ群Ｇ１と該第５レンズ群Ｇ５は像面に対し固
定であり、該第１レンズ群Ｇ１と該第２レンズ群Ｇ２と
の間隔は変化し、該第２レンズ群Ｇ２と該第３レンズ群
Ｇ３の間隔は変化し、該第３レンズ群Ｇ３と該第４レン
ズ群Ｇ４の間隔は減少し、該第４レンズ群Ｇ４と該第５
レンズ群Ｇ５の間隔は変化し、該第１レンズ群Ｇ１は、
物体側から順に、正の屈折力を有する第１レンズ群前部
ＧＬ１と、正の屈折力を有する第１レンズ群後部ＧＬ２
を有し、該第１レンズ群後部ＧＬ２でフォーカスするこ
とを特徴とするズームレンズ。1. A zoom lens having an image stabilizing function, in order from the object side, a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, and a negative refractive power. And a fourth lens group G4 having a positive refracting power, and a fifth lens group G5 having a positive refracting power, the third lens group G3 having a positive refracting power, and a fifth lens group G5 having a positive refracting power when zooming from the wide-angle end to the telephoto end. The first lens group G1 and the fifth lens group G5 are fixed with respect to the image plane, the distance between the first lens group G1 and the second lens group G2 changes, and the second lens group G2 and the third lens group G3 change. The distance between the lens groups G3 changes, the distance between the third lens group G3 and the fourth lens group G4 decreases, and the distance between the fourth lens group G4 and the fifth lens group G4 decreases.
The distance between the lens groups G5 changes, and the first lens group G1 is
The first lens group front portion GL1 having a positive refractive power and the first lens group rear portion GL2 having a positive refractive power are sequentially arranged from the object side.
And a zoom lens characterized by focusing on the rear part GL2 of the first lens group.
する方向に移動させて防振するための変位手段を備えて
いることを特徴とする請求項１に記載のズームレンズ。2. The zoom lens according to claim 1, further comprising a displacement means for moving the fourth lens group G4 in a direction substantially orthogonal to the optical axis for vibration isolation.
２、前記第３レンズ群Ｇ３の焦点距離をｆ３としたと
き、 １.８＜ｆ２／ｆ３＜２.７ ・・・・・ （１） の条件を満足する請求項２に記載のズームレンズ。3. The focal length of the second lens group G2 is f
2. When the focal length of the third lens group G3 is f3, the zoom lens according to claim 2, satisfying the condition of 1.8 <f2 / f3 <2.7 (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002039425A JP4146134B2 (en) | 2002-02-18 | 2002-02-18 | Zoom lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002039425A JP4146134B2 (en) | 2002-02-18 | 2002-02-18 | Zoom lens |
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| Publication Number | Publication Date |
|---|---|
| JP2003241096A true JP2003241096A (en) | 2003-08-27 |
| JP4146134B2 JP4146134B2 (en) | 2008-09-03 |
Family
ID=27780445
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002039425A Expired - Fee Related JP4146134B2 (en) | 2002-02-18 | 2002-02-18 | Zoom lens |
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| Country | Link |
|---|---|
| JP (1) | JP4146134B2 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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