JP4479204B2 - Highly variable magnification optical system capable of image shift - Google Patents
Highly variable magnification optical system capable of image shift Download PDFInfo
- Publication number
- JP4479204B2 JP4479204B2 JP2003341903A JP2003341903A JP4479204B2 JP 4479204 B2 JP4479204 B2 JP 4479204B2 JP 2003341903 A JP2003341903 A JP 2003341903A JP 2003341903 A JP2003341903 A JP 2003341903A JP 4479204 B2 JP4479204 B2 JP 4479204B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lens group
- group
- image
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
-
- 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)
- Adjustment Of Camera Lenses (AREA)
Abstract
Description
本発明は、変倍光学系に関し、特に像シフトが可能な高変倍光学系に関する。 The present invention relates to a variable magnification optical system, and more particularly to a high variable magnification optical system capable of image shift.
近年の光学設計技術・製造技術の進歩により、ズームレンズは小型化と高変倍化が図られ、正、負、正、正の屈折力から成る４群ズームレンズタイプで高変倍化を図っている（例えば、特許文献１参照。）。 Due to recent advances in optical design technology and manufacturing technology, zoom lenses have been downsized and zoomed in, and high zoom ratios have been achieved with a four-group zoom lens type consisting of positive, negative, positive, and positive refractive powers. (For example, refer to Patent Document 1).
また、高変倍化による望遠端状態の焦点距離の増長に伴い、手ぶれの問題が一層顕著になり、これを解決するために手ぶれ補正機能を有する種々のズームレンズが提案されている（例えば、特許文献２参照。）。
しかし、従来の手ぶれ補正機能を有するズームレンズは、光学系を構成するレンズ枚数が多くなり、さらに、鏡筒内に手ぶれ補正を行う機構を組み込まなければならず、鏡筒の全長・外径が大きくなり、コンパクト性が損なわれる傾向にあった。また、手ぶれ補正機能を有しながら高変倍化を図ると光学性能の劣化が著しく、ズームレンズとして満足できる性能を得ることが困難であった。 However, a conventional zoom lens having a camera shake correction function has a large number of lenses constituting an optical system, and a mechanism for correcting camera shake must be incorporated in the lens barrel. There was a tendency for the size to increase and the compactness to be impaired. Further, when zooming is performed while having a camera shake correction function, the optical performance is significantly deteriorated, and it is difficult to obtain satisfactory performance as a zoom lens.
本発明は、上記課題に鑑みてなされたもので、手ぶれ補正が可能で、かつ高変倍化を達成する像シフト可能な高変倍光学系を提供する事を目的としている。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a high-magnification optical system capable of image blurring and capable of image shift that achieves high zooming.
上記問題点を解決するために本発明は、物体側より順に、正の屈折力を有する第１レンズ群と、負の屈折力を有する第２レンズ群と、正の屈折力を有する第３レンズ群と、正の屈折力を有する第４レンズ群とからなり、広角端状態から望遠端状態までレンズ位置状態が変化する際に、前記第１レンズ群と前記第２レンズ群との間隔が増大し、前記第２レンズ群と前記第３レンズ群との間隔が減少し、前記第３レンズ群と前記第４レンズ群との間隔が減少するように、前記第１レンズ群乃至前記第４レンズ群が移動し、前記第２レンズ群は、少なくとも３枚の負レンズと１枚の正レンズとを有し、前記第３レンズ群は、物体側より順に、正の屈折力を有する第３Ａ群と、正の屈折力を有する第３Ｂ群と、負の屈折力を有する第３Ｃ群とから成り、前記第３Ａ群は、２枚の正レンズと１枚の負レンズとから成り、前記第３Ｂ群をシフトレンズ群として、光軸と垂直方向に移動させることによって像をシフトし、以下の条件を満足することを特徴とする像シフト可能な高変倍光学系を提供する。 In order to solve the above-described problems, the present invention, in order from the object side, includes a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens having a positive refractive power. and the group consists of a fourth lens group having positive refractive power, when the lens position state changes to the telephoto end state from the wide-angle end state, a distance between the second lens group and the third lens group is increased The first lens group to the fourth lens so that the distance between the second lens group and the third lens group decreases and the distance between the third lens group and the fourth lens group decreases. The second lens group has at least three negative lenses and one positive lens, and the third lens group has a positive refractive power in order from the object side. And a third group B having positive refractive power and a third group C having negative refractive power. Wherein the 3A group is composed of a two positive lenses and one negative lens, the front Symbol the 3B group as a shift lens group, to shift the image by moving in a direction perpendicular to the optical axis, the following conditions The present invention provides a high-magnification variable optical system capable of image shifting.
０．１２０ ＜ ＤＴ／ｆＴ ＜ ０．２４５
但し、ＤＴは望遠端状態における、前記第１レンズ群の最も像側のレンズ面と前記第２レンズ群の最も物体側のレンズ面との空気間隔、ｆＴは望遠端状態の焦点距離である。
0.120 <DT / fT <0.245
However, DT is an air space between the most image side lens surface of the first lens group and the most object side lens surface of the second lens group in the telephoto end state, and fT is a focal length in the telephoto end state.
本発明によれば、手ぶれ補正が可能で、かつ高変倍化を達成する像シフト可能な高変倍光学系を提供する事ができる。 According to the present invention, it is possible to provide a high-magnification optical system capable of image stabilization and capable of image shift capable of correcting camera shake.
以下、本発明の実施の形態にかかる像シフト可能な高変倍光学系（以後、ズームレンズと記す）について説明する。 Hereinafter, an image-shiftable high variable magnification optical system (hereinafter referred to as a zoom lens) according to an embodiment of the present invention will be described.
本発明の実施の形態にかかるズームレンズは、物体側より順に、正の屈折力を有する第１レンズ群と、負の屈折力を有する第２レンズ群と、正の屈折力を有する第３レンズ群と、正の屈折力を有する第４レンズ群とを有し、広角端状態から望遠端状態までレンズ位置状態が変化する際に、前記第１レンズ群と前記第２レンズ群との間隔が増大し、前記第２レンズ群と前記第３レンズ群との間隔が減少し、前記第３レンズ群と前記第４レンズ群との間隔が減少するように、前記第１レンズ群乃至前記第４レンズ群が移動し、前記第３レンズ群は、正の屈折力を有する少なくとも２つの部分レンズ群を有し、前記部分レンズ群の内の一方の部分レンズ群をシフトレンズ群として、光軸と垂直方向に移動させることにより像をシフトして手ぶれ補正を行うズームレンズであって、以下の条件式（１）を満足している。 The zoom lens according to the embodiment of the present invention includes, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens having a positive refractive power. And a fourth lens group having a positive refractive power, and when the lens position changes from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group is The first lens group to the fourth lens group increase so that the distance between the second lens group and the third lens group decreases and the distance between the third lens group and the fourth lens group decreases. The lens group moves, the third lens group has at least two partial lens groups having positive refractive power, and one of the partial lens groups is a shift lens group, and the optical axis Image stabilization by shifting the image vertically A zoom lens that performs, satisfies the following conditional expression (1).
（１） ０．１２０ ＜ ＤＴ／ｆＴ ＜ ０．２４５
但し、ＤＴは望遠端状態における、第１レンズ群の最も像側のレンズ面と第２レンズ群の最も物体側のレンズ面との空気間隔、ｆＴは望遠端状態の焦点距離である。
(1) 0.120 <DT / fT <0.245
However, DT is the air space between the most image side lens surface of the first lens group and the most object side lens surface of the second lens group in the telephoto end state, and fT is the focal length in the telephoto end state.
正の屈折力を有する第３レンズ群において、正の屈折力を有する少なくとも２つの部分レンズ群の内の一方の部分レンズ群をシフトレンズ群とすると、屈折力が小さくて収差への影響が小さいため、防振時の収差変動を小さくすることができる。さらに、負の屈折力のレンズ群をシフトレンズ群とする手ぶれ補正は、手ぶれと同方向にシフトレンズ群をシフトすることになり、正の屈折力の部分レンズ群をシフトレンズ群とした手ぶれ補正に比べ、制御系の負荷が大きく、手ぶれ補正時の振動も大きくなるため、撮影者に不快感を与える。よって、シフトレンズ群には、正の屈折力を有する部分レンズ群を選択することが望ましい。 In the third lens group having a positive refractive power, if one of the at least two partial lens groups having a positive refractive power is a shift lens group, the refractive power is small and the influence on the aberration is small. Therefore, aberration fluctuations during image stabilization can be reduced. Furthermore, camera shake correction using a lens unit with negative refractive power as a shift lens unit shifts the shift lens unit in the same direction as camera shake, and camera shake correction using a partial lens unit with positive refractive power as a shift lens unit. Compared to the above, the load on the control system is large, and the vibration at the time of camera shake correction is large, which gives the photographer an unpleasant feeling. Therefore, it is desirable to select a partial lens group having a positive refractive power as the shift lens group.
条件式（１）は、望遠端状態における第１レンズ群と第２レンズ群との空気間隔に関する式である。 Conditional expression (1) is an expression relating to the air gap between the first lens group and the second lens group in the telephoto end state.
条件式（１）の下限値を下回ると、望遠端状態での負の球面収差を良好に補正することが出来ず、高い変倍比を達成することが出来なくなってしまうので好ましくない。なお、下限値を０．１５以上に設定すると、さらに球面収差等の諸収差を良好に補正することができるので好ましい。 If the lower limit of conditional expression (1) is not reached, negative spherical aberration in the telephoto end state cannot be corrected well, and a high zoom ratio cannot be achieved. It is preferable to set the lower limit to 0.15 or more because various aberrations such as spherical aberration can be corrected satisfactorily.
条件式（１）の上限値を上回ると、望遠端状態において、第１レンズ群を通過する軸外光束が光軸から離れてしまうため、第１レンズ群の径が大きくなってしまい好ましくない。なお、上限値を０．２４０以下に設定すると、さらに球面収差等の諸収差を良好に補正することができるので好ましい。 Exceeding the upper limit value of conditional expression (1) is not preferable because the off-axis light beam passing through the first lens group is separated from the optical axis in the telephoto end state, and the diameter of the first lens group becomes large. It is preferable to set the upper limit value to 0.240 or less because various aberrations such as spherical aberration can be corrected satisfactorily.
また、本発明の実施の形態にかかるズームレンズおいて、より良好なる結像性能を確保するために、以下の条件式（２）を満足する事が望ましい。 In the zoom lens according to the embodiment of the present invention, it is preferable that the following conditional expression (2) is satisfied in order to ensure better imaging performance.
（２） ０．８ ＜ （１−βＡ）×βＢ ＜ ３．５
但し、βＡはシフトレンズ群の横倍率、βＢはシフトレンズ群と像面との間にある光学要素の横倍率である。
(2) 0.8 < (1-βA) × βB <3.5
Where βA is the lateral magnification of the shift lens group, and βB is the lateral magnification of the optical element between the shift lens group and the image plane.
条件式（２）は、シフトレンズ群の横倍率とシフトレンズ群と像面との間にある光学要素の横倍率に関する式である。 Conditional expression (2) is an expression relating to the lateral magnification of the shift lens group and the lateral magnification of the optical element between the shift lens group and the image plane.
条件式（２）の下限値を下回ると、必要な像のシフト量を得るためのシフトレンズ群の偏芯量が大きくなり、シフトレンズ群の外径の大型化と重量の増加を招いてしまう。その結果、シフトレンズ群の駆動装置も肥大化し、コンパクト性を損なってしまうので好ましくない。 If the lower limit of conditional expression (2) is not reached, the amount of decentering of the shift lens group for obtaining the required image shift amount will increase, leading to an increase in the outer diameter and weight of the shift lens group. . As a result, the driving device for the shift lens group is enlarged, and the compactness is impaired.
条件式（２）の上限値を上回ると、シフトレンズ群の微小変位によっても像が大きくぶれてしまうので、手ぶれ補正時のシフトレンズ群の駆動・制御が困難になるため好ましくない。なお、上限値を３.０以下に設定すると、さらにシフトレンズ群の駆動・制御が容易となり、良好な光学性能を得ることができるので好ましい。 Exceeding the upper limit value of conditional expression (2) is not preferable because the image is greatly blurred due to a minute displacement of the shift lens group, and it becomes difficult to drive and control the shift lens group during camera shake correction. In addition, it is preferable to set the upper limit value to 3.0 or less because it becomes easier to drive and control the shift lens group and good optical performance can be obtained.
また、本発明の実施の形態にかかるズームレンズおいて、第３レンズ群は、物体側から順に、正の屈折力を有する第３Ａ群と、正の屈折力を有する第３Ｂ群と、負の屈折力を有する第３Ｃ群とから成り、第３Ｂ群をシフトレンズ群とすることが望ましい。これにより、シフトレンズ群の小型化・軽量化が達成でき、それに伴うシフトレンズ群の駆動装置の小型化・軽量化も図られ、良好な結像性能を損なうことなく、コンパクトで高変倍の光学系を得ることが可能となる。 In the zoom lens according to the embodiment of the present invention, the third lens group includes, in order from the object side, a third A group having positive refractive power, a third B group having positive refractive power, and a negative It is desirable that the third lens group includes a third lens group having refractive power and the third lens group is a shift lens group. As a result, the shift lens group can be reduced in size and weight, and the shift lens group drive unit can be reduced in size and weight, and the compact and high zoom ratio can be achieved without impairing good imaging performance. An optical system can be obtained.
また、本発明の実施の形態にかかるズームレンズにおいて、シフトレンズ群に少なくとも１面以上の非球面を有することが望ましい。これにより像シフト時に、より良好な結像性能を得ることが可能となる。 In the zoom lens according to the embodiment of the present invention, it is desirable that the shift lens group has at least one aspheric surface. This makes it possible to obtain better imaging performance during image shift.
また、本発明の実施の形態にかかるズームレンズにおいて、第２レンズ群が少なくとも３枚の負レンズと１枚の正レンズを有し、第３Ａ群が２枚の正レンズと１枚の負レンズを有し、第３Ｂ群が１枚の正レンズと１枚の負レンズから構成され、第４レンズ群にレンズ中心からレンズ周辺に行くに従って正の屈折力が強くなる形状の非球面を少なくとも１面有することが望ましい。これによりコンパクトで良好な光学性能のズームレンズを達成することができる。 In the zoom lens according to the embodiment of the present invention, the second lens group includes at least three negative lenses and one positive lens, and the third A group includes two positive lenses and one negative lens. The third lens group is composed of one positive lens and one negative lens, and the fourth lens group has at least one aspherical surface with a positive refractive power that increases from the lens center to the lens periphery. It is desirable to have a surface. Thereby, a zoom lens having a compact and good optical performance can be achieved.
なお、本発明の実施の形態にかかるズームレンズでは、フォーカシングを第２レンズ群で行っているが、第２レンズ群以外で行う事も可能である。 In the zoom lens according to the embodiment of the present invention, focusing is performed by the second lens group, but it can also be performed by other than the second lens group.
また、開口絞りを第２群レンズ群と第３レンズ群の間に配置しているが、それ以外のレンズ群とレンズ群の間、例えば第３レンズ群と第４レンズ群の間や、レンズ群内、例えば第３レンズ群内に配置することも可能である。 Further, the aperture stop is arranged between the second lens group and the third lens group, but between the other lens groups and the lens group, for example, between the third lens group and the fourth lens group, or the lens. It is also possible to arrange in the third lens group, for example.
また、本発明の実施の形態にかかるズームレンズは、４つのレンズ群で構成されるが、各レンズ群の間や隣接した像側や物体側に他のレンズ群を付加することも可能である。 In addition, the zoom lens according to the embodiment of the present invention includes four lens groups. However, it is possible to add other lens groups between the lens groups or adjacent to the image side or the object side. .
また、本発明の実施の形態にかかるズームレンズにおいて、別の観点によれば、回折光学素子を用いる事も可能である。回折光学素子を用いる事により特に色収差を良好に補正する事ができる。 Further, in the zoom lens according to the embodiment of the present invention, it is also possible to use a diffractive optical element from another viewpoint. By using a diffractive optical element, chromatic aberration can be corrected particularly well.
（実施例）
以下に、本発明の各実施例にかかるズームレンズについて説明する。
(Example)
The zoom lens according to each example of the present invention is described below.
各実施例において、非球面は以下の式で表される。 In each embodiment, the aspherical surface is expressed by the following equation.
（数１）
ｘ＝ｃｙ2／｛１＋（１−κｃ2ｙ2）1/2｝＋Ｃ４ｙ4＋Ｃ６ｙ6＋Ｃ８ｙ8＋Ｃ１０ｙ10
なお、ｙは光軸からの高さ、ｘはサグ量、ｃは基準球面の曲率（近軸曲率）、κは円錐定数、Ｃ４，Ｃ６，Ｃ８、Ｃ１０は、それぞれ４次、６次、８次、１０次の非球面係数である。
(Equation 1)
x = cy 2 / {1+ (1-κc 2 y 2 ) 1/2 } + C4y 4 + C6y 6 + C8y 8 + C10y 10
Here, y is the height from the optical axis, x is the sag amount, c is the curvature of the reference spherical surface (paraxial curvature), κ is the conic constant, and C4, C6, C8, and C10 are the 4th, 6th, and 8th, respectively. Next, a 10th-order aspheric coefficient.
（第１実施例）
図１は、本発明の第１実施例によるズームレンズの断面図を示している。
(First embodiment)
FIG. 1 shows a sectional view of a zoom lens according to a first embodiment of the present invention.
図１において、物体側より順に、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、正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とを有し、広角端状態から望遠端状態までレンズ位置状態が変化する際に、前記第１レンズ群Ｇ１と前記第２レンズ群Ｇ２との間隔が増大し、前記第２レンズ群Ｇ２と前記第３レンズ群Ｇ３との間隔が減少し、前記第３レンズ群Ｇ３と前記第４レンズ群Ｇ４との間隔が減少するように、前記第１レンズ群Ｇ１乃至前記第４レンズ群Ｇ４が移動するようにズームレンズが構成されている。符号Ｉは、像面を示している。 In FIG. 1, 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, a third lens group G3 having a positive refractive power, and a positive When the lens position state changes from the wide-angle end state to the telephoto end state, the distance between the first lens group G1 and the second lens group G2 increases. The first lens groups G1 to G1 are arranged such that the distance between the second lens group G2 and the third lens group G3 is decreased, and the distance between the third lens group G3 and the fourth lens group G4 is decreased. The zoom lens is configured so that the fourth lens group G4 moves. Reference numeral I indicates an image plane.
また、第３レンズ群Ｇ３は、物体側から順に、正の屈折力を有する第３Ａ群と、正の屈折力を有する第３Ｂ群と、負の屈折力を有する第３Ｃ群とから成り、第３Ｂ群をシフトレンズ群として光軸に垂直に移動させ像シフトを可能としている。 The third lens group G3 includes, in order from the object side, a third A group having a positive refractive power, a third B group having a positive refractive power, and a third C group having a negative refractive power. The 3B group is moved as a shift lens group perpendicularly to the optical axis to enable image shift.
第１レンズ群Ｇ１は、物体側に凸面を向けた負メニスカスレンズＬ１１と両凸形状の正レンズＬ１２との接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ１３とから構成されている。 The first lens group G1 includes a cemented lens of a negative meniscus lens L11 having a convex surface facing the object side and a biconvex positive lens L12, and a positive meniscus lens L13 having a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ２１と両凹形状の負レンズＬ２２と両凸形状の正レンズＬ２３と両凹形状の負レンズＬ２４とから構成されている。 The second lens group G2 includes a negative meniscus lens L21 having a convex surface directed toward the object side, a biconcave negative lens L22, a biconvex positive lens L23, and a biconcave negative lens L24.
第３レンズ群Ｇ３は、両凸形状の正レンズＬ３１と、物体側に凸面を向けた正メニスカスレンズＬ３２と物体側に凸面を向けた負メニスカスレンズＬ３３との接合レンズとからなる第３Ａ群と、両凸形状の正レンズＬ３４と物体側に凹面を向けた負メニスカスレンズＬ３５との接合レンズからなる第３Ｂ群と、物体側に凹面を向けた負メニスカスレンズＬ３６からなる第３Ｃ群とから構成されている。 The third lens group G3 is composed of a biconvex positive lens L31, a cemented lens of a positive meniscus lens L32 having a convex surface facing the object side, and a negative meniscus lens L33 having a convex surface facing the object side. 3B group consisting of a cemented lens of a biconvex positive lens L34 and a negative meniscus lens L35 having a concave surface facing the object side, and a third C group consisting of a negative meniscus lens L36 having a concave surface facing the object side Has been.
第４レンズ群Ｇ４は、両凸形状の正レンズＬ４１と、物体側に凹面を向けた正メニスカスレンズＬ４２と両凹形状の負レンズＬ４３との接合レンズとから構成されている。 The fourth lens group G4 includes a biconvex positive lens L41, and a cemented lens of a positive meniscus lens L42 having a concave surface facing the object side and a biconcave negative lens L43.
また、開口絞りＳは第３レンズ群Ｇ３の最も物体側のレンズ面の近傍に設けられ、変倍の際に第３レンズ群Ｇ３と共に移動する。 The aperture stop S is provided in the vicinity of the lens surface closest to the object side of the third lens group G3, and moves together with the third lens group G3 during zooming.
以下の表１に、本発明の第１実施例にかかるズームレンズの諸元の値を掲げる。表中のｆは焦点距離、FNOはＦナンバー、２ωは画角、BFはバックフォーカスを表し、アッベ数および屈折率はｄ線（λ=587.6nm）に対する値を示している。 Table 1 below provides values of specifications of the zoom lens according to the first example of the present invention. In the table, f represents the focal length, FNO represents the F number, 2ω represents the angle of view, BF represents the back focus, and the Abbe number and the refractive index represent values with respect to the d-line (λ = 587.6 nm).
なお、以下の全ての諸元値において掲載されている焦点距離ｆ、曲率半径、面間隔、その他長さの単位は一般に「ｍｍ」が使われるが、光学系は、比例拡大または比例縮小しても同等の光学性能が得られるので、これに限られるものではない。また、曲率半径0.0000は平面を示し、空気の屈折率1.00000は省略してある。非球面係数の「Ｅ−ｎ」は「１０-n」を示す。なお、上述の記号の説明は他の実施例でも同様である。 In addition, the focal length f, the radius of curvature, the surface interval, and other length units listed in all the following specification values are generally “mm”, but the optical system is proportionally enlarged or reduced. However, the same optical performance can be obtained, and the present invention is not limited to this. The radius of curvature of 0.0000 indicates a plane, and the refractive index of air of 1.0000 is omitted. “E-n” of the aspheric coefficient indicates “10 −n ”. The description of the above symbols is the same in the other embodiments.
（表１）
（全体諸元）
広角端状態 中間焦点距離状態 望遠端状態
f 31.169 112.180 299.993
２ω 72.3 21.0 8.0°
FNO 3.6 5.6 6.6
（レンズデータ）
面番号 曲率半径 面間隔 アッベ数 屈折率
1 128.0762 2.000 28.56 1.79504
2 74.7110 8.000 82.52 1.49782
3 -301.4490 0.100
4 62.5606 5.200 82.52 1.49782
5 174.0263 D1
6 133.1122 0.200 38.09 1.55389
7 110.0000 1.000 49.61 1.77250
8 18.5937 4.800
9 -68.9214 1.000 42.72 1.83481
10 80.9399 0.100
11 31.2602 4.200 22.76 1.80809
12 -61.8236 1.200
13 -26.3434 1.000 49.61 1.77250
14 302.0857 D2
15 0.0000 0.500 （開口絞りＳ）
16 32.0000 3.500 54.66 1.72916
17 -631.6375 0.100
18 21.1207 4.000 82.52 1.49782
19 248.3602 1.000 37.17 1.83400
20 28.9425 3.000
21 49.5392 3.000 49.52 1.74442
22 -39.8231 1.000 23.78 1.84666
23 -121.9266 3.000
24 -26.5552 1.000 42.72 1.83481
25 -220.0557 D3
26 53.1534 4.000 55.34 1.67790
27 -20.4060 0.100
28 -117.6204 4.000 33.80 1.64769
29 -14.2583 1.000 42.72 1.83481
30 71.3854 BF
（非球面係数）
第６面、第２１面、第２６面および第２７面の各レンズ面は非球面であり、非球面係数を以下に示す。
面 κ C 4 C 6 C 8 C10
6 64.5192 7.6611E-07 1.7093E-09 -2.1081E-11 1.0148E-13
21 -1.0025 -5.4592E-07 -3.9750E-09 2.0368E-11 1.8147E-13
26 -19.8163 1.9335E-07 -2.0631E-08 1.4059E-10 0.0000E-00
27 0.3829 6.9273E-06 -1.0557E-08 1.5108E-10 -3.9880E-13
（可変間隔データ）
焦点距離を変化させる際の可変間隔を以下に示す。
広角端状態 中間焦点距離状態 望遠端状態
f 31.169 112.180 299.993
D1 1.692 38.508 62.092
D2 27.147 12.174 1.502
D3 4.956 0.910 0.033
BF 46.216 82.184 100.098
(像シフト時の諸量)
広角端状態 中間焦点距離状態 望遠端状態
f 31.169 112.180 299.993
シフトレンズ群の移動量 0.250 0.350 0.450
像の移動量 0.295 0.673 1.041
（条件式対応値）
（１） ＤＴ／ｆＴ ＝ ０．２０７
（２） （１−βＡ）×βＢ＝１．２（広角端状態）〜１．９（中間焦点距離状態）〜２．３（望遠端状態）
(Table 1)
(Overall specifications)
Wide-angle end state Intermediate focal length state Telephoto end state
f 31.169 112.180 299.993
2ω 72.3 21.0 8.0 °
FNO 3.6 5.6 6.6
(Lens data)
Surface number Curvature radius Surface spacing Abbe number Refractive index
1 128.0762 2.000 28.56 1.79504
2 74.7110 8.000 82.52 1.49782
3 -301.4490 0.100
4 62.5606 5.200 82.52 1.49782
5 174.0263 D1
6 133.1122 0.200 38.09 1.55389
7 110.0000 1.000 49.61 1.77250
8 18.5937 4.800
9 -68.9214 1.000 42.72 1.83481
10 80.9399 0.100
11 31.2602 4.200 22.76 1.80809
12 -61.8236 1.200
13 -26.3434 1.000 49.61 1.77250
14 302.0857 D2
15 0.0000 0.500 (Aperture stop S)
16 32.0000 3.500 54.66 1.72916
17 -631.6375 0.100
18 21.1207 4.000 82.52 1.49782
19 248.3602 1.000 37.17 1.83400
20 28.9425 3.000
21 49.5392 3.000 49.52 1.74442
22 -39.8231 1.000 23.78 1.84666
23 -121.9266 3.000
24 -26.5552 1.000 42.72 1.83481
25 -220.0557 D3
26 53.1534 4.000 55.34 1.67790
27 -20.4060 0.100
28 -117.6204 4.000 33.80 1.64769
29 -14.2583 1.000 42.72 1.83481
30 71.3854 BF
(Aspheric coefficient)
The lens surfaces of the sixth surface, the twenty-first surface, the twenty-sixth surface and the twenty-seventh surface are aspheric surfaces, and the aspheric coefficients are shown below.
Face κ C 4 C 6
6 64.5192 7.6611E-07 1.7093E-09 -2.1081E-11 1.0148E-13
21 -1.0025 -5.4592E-07 -3.9750E-09 2.0368E-11 1.8147E-13
26 -19.8163 1.9335E-07 -2.0631E-08 1.4059E-10 0.0000E-00
27 0.3829 6.9273E-06 -1.0557E-08 1.5108E-10 -3.9880E-13
(Variable interval data)
The variable interval when changing the focal length is shown below.
Wide-angle end state Intermediate focal length state Telephoto end state
f 31.169 112.180 299.993
D1 1.692 38.508 62.092
D2 27.147 12.174 1.502
D3 4.956 0.910 0.033
BF 46.216 82.184 100.098
(Various amounts during image shift)
Wide-angle end state Intermediate focal length state Telephoto end state
f 31.169 112.180 299.993
Shift lens group travel 0.250 0.350 0.450
Image travel 0.295 0.673 1.041
(Values for conditional expressions)
(1) DT / fT = 0.207
(2) (1-βA) × βB = 1.2 (wide-angle end state) to 1.9 (intermediate focal length state) to 2.3 (telephoto end state)
図２より図４は、本発明の第１実施例にかかるズームレンズの無限遠合焦状態におけるｄ線（波長５８７．６ｎｍ）での諸収差図をそれぞれ示す。図２（ａ）、（ｂ）は広角端状態（ｆ＝31.2）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図３（ａ）、（ｂ）は中間焦点距離状態（ｆ＝112.2）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図４（ａ）、（ｂ）は望遠端状態（ｆ＝300.0）の諸収差図で、（ａ）は非防振時諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。 FIGS. 2 to 4 are graphs showing various aberrations at the d-line (wavelength 587.6 nm) in the infinitely focused state of the zoom lens according to the first example of the present invention. FIGS. 2A and 2B are graphs showing various aberrations in the wide-angle end state (f = 31.2), FIG. 2A is a diagram showing various aberrations during non-vibration prevention, and FIG. Each is shown. FIGS. 3A and 3B are graphs showing various aberrations in the intermediate focal length state (f = 112.2). FIG. 3A is a diagram showing various aberrations during non-vibration prevention. FIG. Respectively. FIGS. 4A and 4B are graphs showing various aberrations in the telephoto end state (f = 300.0), FIG. 4A is a diagram showing various aberrations during non-vibration prevention, and FIG. Show.
図２より図４の各収差図において、ＦＮＯはＦナンバーを、Ａは半画角をそれぞれ示している。球面収差図では最大口径に対するＦナンバーの値を示し、非点収差図、歪曲収差図では半画角Ａの最大値をそれぞれ示し、コマ収差図では各半画角Ａの値を示す。また、非点収差図では実線はサジタル像面を、破線はメリディオナル像面を示している。以上の収差図の説明は、他の実施例においても同様である。 2 to 4, FNO indicates an F number, and A indicates a half angle of view. The spherical aberration diagram shows the F-number value with respect to the maximum aperture, the astigmatism diagram and the distortion diagram show the maximum value of the half field angle A, and the coma diagram shows the value of each half field angle A. In the astigmatism diagram, the solid line indicates the sagittal image plane, and the broken line indicates the meridional image plane. The explanation of the above aberration diagrams is the same in the other examples.
各収差図から、本第１実施例は諸収差が良好に補正され、優れた結像性能を有していることは明らかである。 From each aberration diagram, it is apparent that the first embodiment has excellent imaging performance with various aberrations corrected well.
（第２実施例）
図５は、本発明の第２実施例によるズームレンズの断面図を示している。
(Second embodiment)
FIG. 5 shows a cross-sectional view of a zoom lens according to a second embodiment of the present invention.
図５において、物体側より順に、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、正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とを有し、広角端状態から望遠端状態までレンズ位置状態が変化する際に、前記第１レンズ群Ｇ１と前記第２レンズ群Ｇ２との間隔が増大し、前記第２レンズ群Ｇ２と前記第３レンズ群Ｇ３との間隔が減少し、前記第３レンズ群Ｇ３と前記第４レンズ群Ｇ４との間隔が減少するように、前記第１レンズ群Ｇ１乃至前記第４レンズ群Ｇ４が移動するようにズームレンズが構成されている。符号Ｉは、像面を示している。 In FIG. 5, 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, a third lens group G3 having a positive refractive power, and a positive When the lens position state changes from the wide-angle end state to the telephoto end state, the distance between the first lens group G1 and the second lens group G2 increases. The first lens groups G1 to G1 are arranged such that the distance between the second lens group G2 and the third lens group G3 is decreased, and the distance between the third lens group G3 and the fourth lens group G4 is decreased. The zoom lens is configured so that the fourth lens group G4 moves. Reference numeral I indicates an image plane.
また、第３レンズ群Ｇ３は、物体側から順に、正の屈折力を有する第３Ａ群と、正の屈折力を有する第３Ｂ群と、負の屈折力を有する第３Ｃ群とから成り、第３Ｂ群をシフトレンズ群として光軸に垂直に移動させ像シフトを可能としている。 The third lens group G3 includes, in order from the object side, a third A group having a positive refractive power, a third B group having a positive refractive power, and a third C group having a negative refractive power. The 3B group is moved as a shift lens group perpendicularly to the optical axis to enable image shift.
第１レンズ群Ｇ１は、物体側に凸面を向けた負メニスカスレンズＬ１１と両凸形状の正レンズＬ１２との接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ１３とから構成されている。 The first lens group G1 includes a cemented lens of a negative meniscus lens L11 having a convex surface facing the object side and a biconvex positive lens L12, and a positive meniscus lens L13 having a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ２１と両凹形状の負レンズＬ２２と両凸形状の正レンズＬ２３と両凹形状の負レンズＬ２４とから構成されている。 The second lens group G2 includes a negative meniscus lens L21 having a convex surface directed toward the object side, a biconcave negative lens L22, a biconvex positive lens L23, and a biconcave negative lens L24.
第３レンズ群Ｇ３は、両凸形状の正レンズＬ３１と、両凸形状の正レンズＬ３２と両凹形状の負レンズＬ３３との接合レンズとからなる第３Ａ群と、両凸形状の正レンズＬ３４と物体側に凹面を向けた負メニスカスレンズＬ３５との接合レンズからなる第３Ｂ群と、両凹形状の負レンズＬ３６からなる第３Ｃ群とから構成されている。 The third lens group G3 includes a biconvex positive lens L31, a third lens group consisting of a cemented lens of a biconvex positive lens L32 and a biconcave negative lens L33, and a biconvex positive lens L34. And a third B group consisting of a cemented lens with a negative meniscus lens L35 having a concave surface facing the object side, and a third C group consisting of a biconcave negative lens L36.
第４レンズ群Ｇ４は、両凸形状の正レンズＬ４１と、物体側に凹面を向けた正メニスカスレンズＬ４２と両凹形状の負レンズＬ４３との接合レンズとから構成されている。 The fourth lens group G4 includes a biconvex positive lens L41, and a cemented lens of a positive meniscus lens L42 having a concave surface facing the object side and a biconcave negative lens L43.
また、開口絞りＳは第３レンズ群Ｇ３の最も物体側のレンズ面の近傍に設けられ、変倍の際に第３レンズ群Ｇ３と共に移動する。 The aperture stop S is provided in the vicinity of the lens surface closest to the object side of the third lens group G3, and moves together with the third lens group G3 during zooming.
以下の表２に、本発明の第２実施例にかかるズームレンズの諸元の値を掲げる。 Table 2 below provides values of specifications of the zoom lens according to the second example of the present invention.
（表２）
（全体諸元）
広角端状態 中間焦点距離状態 望遠端状態
f 29.207 115.150 349.995
２ω 75.8 20.5 6.9°
FNO 3.6 6.0 6.7
（レンズデータ）
面番号 曲率半径 面間隔 アッベ数 屈折率
1 95.2158 2.000 28.56 1.79504
2 62.6157 8.200 82.52 1.49782
3 -924.0888 0.100
4 73.6118 5.000 82.52 1.49782
5 303.8324 D1
6 119.3054 0.200 38.09 1.55389
7 100.0000 1.200 49.61 1.77250
18 18.8047 6.417
19 -48.2046 1.000 42.72 1.83481
10 65.6505 0.100
11 34.8008 4.800 22.76 1.80809
12 -44.4934 1.000
13 -24.5572 1.000 49.61 1.77250
14 1817.3930 D2
15 0.0000 0.500 （開口絞りＳ）
16 27.1464 4.500 55.52 1.69680
17 -150.2724 0.100
18 26.8350 5.000 82.52 1.49782
19 -46.9911 1.000 37.17 1.83400
20 38.4531 3.000
21 45.1473 3.800 49.52 1.74442
22 -68.3823 1.000 23.78 1.84666
23 -181.6270 2.000
24 -36.5030 1.000 42.72 1.83481
25 357.3702 D3
26 60.3036 4.200 55.52 1.69680
27 -24.3217 0.100
28 -83.5169 5.500 33.80 1.64769
29 -13.7618 1.000 42.72 1.83481
30 144.8077 BF
（非球面係数）
第６面、第２１面、第２６面、および第２７面の各レンズ面は非球面であり、以下に非球面係数を示す。
面 κ C 4 C 6 C 8 C10
6 40.8477 8.7927E-07 -1.6679E-09 -7.6432E-12 1.0148E-13
21 0.3574 -3.3903E-06 9.1445E-09 -2.4850E-11 0.0000E-00
26 -0.5113 -8.1127E-06 -3.1018E-08 1.8406E-10 0.0000E-00
27 2.0550 2.1909E-05 -1.2389E-08 2.0864E-10 0.0000E-00
（可変間隔データ）
焦点距離を変化させる際の可変間隔を以下に示す。
望遠端状態 中間焦点距離状態 広角端状態
f 29.207 115.150 349.995
D1 1.400 38.416 62.500
D2 27.734 12.761 2.089
D3 5.892 1.846 0.970
BF 43.781 86.842 112.269
(像シフト時の諸量)
広角端状態 中間焦点距離状態 望遠端状態
f 29.207 115.150 349.995
シフトレンズ群の移動量 0.250 0.350 0.450
像の移動量 0.296 0.724 1.178
（条件式対応値）
（１） ＤＴ／ｆＴ ＝ ０．１７９
（２） （１−βＡ）×βＢ＝１．２（広角端状態）〜２．１（中間焦点距離状態）〜２．６（望遠端状態）
(Table 2)
(Overall specifications)
Wide-angle end state Intermediate focal length state Telephoto end state
f 29.207 115.150 349.995
2ω 75.8 20.5 6.9 °
FNO 3.6 6.0 6.7
(Lens data)
Surface number Curvature radius Surface spacing Abbe number Refractive index
1 95.2158 2.000 28.56 1.79504
2 62.6157 8.200 82.52 1.49782
3 -924.0888 0.100
4 73.6118 5.000 82.52 1.49782
5 303.8324 D1
6 119.3054 0.200 38.09 1.55389
7 100.0000 1.200 49.61 1.77250
18 18.8047 6.417
19 -48.2046 1.000 42.72 1.83481
10 65.6505 0.100
11 34.8008 4.800 22.76 1.80809
12 -44.4934 1.000
13 -24.5572 1.000 49.61 1.77250
14 1817.3930 D2
15 0.0000 0.500 (Aperture stop S)
16 27.1464 4.500 55.52 1.69680
17 -150.2724 0.100
18 26.8350 5.000 82.52 1.49782
19 -46.9911 1.000 37.17 1.83400
20 38.4531 3.000
21 45.1473 3.800 49.52 1.74442
22 -68.3823 1.000 23.78 1.84666
23 -181.6270 2.000
24 -36.5030 1.000 42.72 1.83481
25 357.3702 D3
26 60.3036 4.200 55.52 1.69680
27 -24.3217 0.100
28 -83.5169 5.500 33.80 1.64769
29 -13.7618 1.000 42.72 1.83481
30 144.8077 BF
(Aspheric coefficient)
The lens surfaces of the sixth surface, the twenty-first surface, the twenty-sixth surface, and the twenty-seventh surface are aspheric surfaces, and the aspheric coefficients are shown below.
Face κ C 4 C 6
6 40.8477 8.7927E-07 -1.6679E-09 -7.6432E-12 1.0148E-13
21 0.3574 -3.3903E-06 9.1445E-09 -2.4850E-11 0.0000E-00
26 -0.5113 -8.1127E-06 -3.1018E-08 1.8406E-10 0.0000E-00
27 2.0550 2.1909E-05 -1.2389E-08 2.0864E-10 0.0000E-00
(Variable interval data)
The variable interval when changing the focal length is shown below.
Telephoto end state Intermediate focal length state Wide-angle end state
f 29.207 115.150 349.995
D1 1.400 38.416 62.500
D2 27.734 12.761 2.089
D3 5.892 1.846 0.970
BF 43.781 86.842 112.269
(Various amounts during image shift)
Wide-angle end state Intermediate focal length state Telephoto end state
f 29.207 115.150 349.995
Shift lens group travel 0.250 0.350 0.450
Image travel 0.296 0.724 1.178
(Values for conditional expressions)
(1) DT / fT = 0.179
(2) (1-βA) × βB = 1.2 (wide-angle end state) to 2.1 (intermediate focal length state) to 2.6 (telephoto end state)
図６より図８は、本発明の第２実施例にかかるズームレンズの無限遠合焦状態におけるｄ線（波長５８７．６ｎｍ）での諸収差図をそれぞれ示す。図６（ａ）、（ｂ）は広角端状態（ｆ＝29.2）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図７（ａ）、（ｂ）は中間焦点距離状態（ｆ＝115.2）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図８（ａ）、（ｂ）は望遠端状態（ｆ＝350.0）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。 6 to 8 are graphs showing various aberrations at the d-line (wavelength 587.6 nm) in the infinitely focused state of the zoom lens according to the second example of the present invention. FIGS. 6A and 6B are graphs showing various aberrations in the wide-angle end state (f = 29.2), FIG. 6A is a diagram showing various aberrations during non-vibration prevention, and FIG. Each is shown. FIGS. 7A and 7B are graphs showing various aberrations in the intermediate focal length state (f = 115.2), FIG. 7A is a diagram showing various aberrations at the time of non-vibration prevention, and FIG. Respectively. 8A and 8B are graphs showing various aberrations in the telephoto end state (f = 350.0), FIG. 8A is a diagram showing various aberrations during non-vibration prevention, and FIG. 8B is a diagram showing lateral aberrations during vibration isolation. Each is shown.
各収差図から、本第２実施例は諸収差が良好に補正され、優れた結像性能を有していることは明らかである。 From each aberration diagram, it is clear that the second embodiment has excellent imaging performance with various aberrations corrected well.
（第３実施例）
図９は、本発明の第３実施例によるズームレンズの断面図を示している。
(Third embodiment)
FIG. 9 shows a sectional view of a zoom lens according to the third embodiment of the present invention.
図９において、物体側より順に、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、正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とを有し、広角端状態から望遠端状態までレンズ位置状態が変化する際に、前記第１レンズ群Ｇ１と前記第２レンズ群Ｇ２との間隔が増大し、前記第２レンズ群Ｇ２と前記第３レンズ群Ｇ３との間隔が減少し、前記第３レンズ群Ｇ３と前記第４レンズ群Ｇ４との間隔が減少するように、前記第１レンズ群Ｇ１乃至前記第４レンズ群Ｇ４が移動するようにズームレンズが構成されている。符号Ｉは、像面を示している。 In FIG. 9, 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, a third lens group G3 having a positive refractive power, and a positive When the lens position state changes from the wide-angle end state to the telephoto end state, the distance between the first lens group G1 and the second lens group G2 increases. The first lens groups G1 to G1 are arranged such that the distance between the second lens group G2 and the third lens group G3 is decreased, and the distance between the third lens group G3 and the fourth lens group G4 is decreased. The zoom lens is configured so that the fourth lens group G4 moves. Reference numeral I indicates an image plane.
また、第３レンズ群Ｇ３は、物体側から順に、正の屈折力を有する第３Ａ群と、正の屈折力を有する第３Ｂ群と、負の屈折力を有する第３Ｃ群とから成り、第３Ｂ群をシフトレンズ群として光軸に垂直に移動させ像シフトを可能としている。 The third lens group G3 includes, in order from the object side, a third A group having a positive refractive power, a third B group having a positive refractive power, and a third C group having a negative refractive power. The 3B group is moved as a shift lens group perpendicularly to the optical axis to enable image shift.
第１レンズ群Ｇ１は、物体側に凸面を向けた負メニスカスレンズＬ１１と両凸形状の正レンズＬ１２との接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ１３とから構成されている。 The first lens group G1 includes a cemented lens of a negative meniscus lens L11 having a convex surface facing the object side and a biconvex positive lens L12, and a positive meniscus lens L13 having a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ２１と両凹形状の負レンズＬ２２と両凸形状の正レンズＬ２３と両凹形状の負レンズＬ２４とから構成されている。 The second lens group G2 includes a negative meniscus lens L21 having a convex surface directed toward the object side, a biconcave negative lens L22, a biconvex positive lens L23, and a biconcave negative lens L24.
第３レンズ群Ｇ３は、両凸形状の正レンズＬ３１と、両凸形状の正レンズＬ３２と両凹形状の負レンズＬ３３との接合レンズとからなる第３Ａ群と、両凸形状の正レンズＬ３４と物体側に凹面を向けた負メニスカスレンズＬ３５との接合レンズからなる第３Ｂ群と、両凹形状の負レンズＬ３６からなる第３Ｃ群とから構成されている。 The third lens group G3 includes a biconvex positive lens L31, a third lens group consisting of a cemented lens of a biconvex positive lens L32 and a biconcave negative lens L33, and a biconvex positive lens L34. And a third B group consisting of a cemented lens with a negative meniscus lens L35 having a concave surface facing the object side, and a third C group consisting of a biconcave negative lens L36.
第４レンズ群Ｇ４は、両凸形状の正レンズＬ４１と、物体側に凹面を向けた正メニスカスレンズＬ４２と両凹形状の負レンズＬ４３との接合レンズとから構成されている。 The fourth lens group G4 includes a biconvex positive lens L41, and a cemented lens of a positive meniscus lens L42 having a concave surface facing the object side and a biconcave negative lens L43.
また、開口絞りＳは第３レンズ群Ｇ３の最も物体側のレンズ面の近傍に設けられ、変倍の際に第３レンズ群Ｇ３と共に移動する。 The aperture stop S is provided in the vicinity of the lens surface closest to the object side of the third lens group G3, and moves together with the third lens group G3 during zooming.
以下の表３に、本発明の第３実施例にかかるズームレンズの諸元の値を掲げる。 Table 3 below provides values of specifications of the zoom lens according to the third example of the present invention.
（表３）
（全体諸元）
広角端状態 中間焦点距離状態 望遠端状態
f 30.785 100.428 260.003
２ω 73.0 23.4 9.2°
FNO 3.6 5.2 6.2
（レンズデータ）
面番号 曲率半径 面間隔 アッベ数 屈折率
1 113.0938 2.000 23.78 1.84666
2 77.8725 7.500 82.52 1.49782
3 -392.0046 0.100
4 63.1691 4.500 82.52 1.49782
5 144.9233 D1
6 187.1436 0.200 38.09 1.55389
7 160.7200 1.200 49.61 1.77250
8 19.5404 6.200
9 -57.2837 1.000 42.72 1.83481
10 89.0734 0.100
11 35.5271 4.500 23.78 1.84666
12 -48.5191 1.000
13 -27.5498 1.000 49.61 1.77250
14 274.0976 D2
15 0.0000 0.500 （開口絞りＳ）
16 30.0000 4.000 55.34 1.67790
17 -79.6551 0.100
18 21.4733 4.500 82.52 1.49782
19 -131.3788 1.000 37.17 1.83400
20 29.5229 2.500
21 46.6074 3.200 49.52 1.74442
22 -50.5322 1.000 23.78 1.84666
23 -178.5738 2.500
24 -27.8094 1.000 42.72 1.83481
25 143.2554 D3
26 87.3995 4.500 55.34 1.67790
27 -21.0343 0.200
28 -102.6584 5.000 34.47 1.63980
29 -14.3797 1.000 42.72 1.83481
30 459.5424 BF
（非球面係）
第６面、第２１面、第２６面、および第２７面の各レンズ面は非球面であり、以下に非球面係数を示す。
面 κ C 4 C 6 C 8 C10
6 1.0000 3.4488E-06 3.5836E-09 -1.8482E-11 1.2823E-13
21 -5.3475 3.9544E-06 -2.1153E-09 1.2308E-11 1.8147E-13
26 -18.7137 -9.3928E-06 -7.6348E-09 1.4059E-10 0.0000E-00
27 0.7025 4.8101E-06 -1.1899E-08 1.9145E-10 -3.9880E-13
（可変間隔データ）
焦点距離を変化させる際の可変間隔を以下に示す。
広角端状態 中間焦点距離状態 望遠端状態
f 30.785 100.428 260.003
D1 1.791 38.386 61.905
D2 28.018 13.045 2.372
D3 6.467 2.421 1.544
BF 42.136 72.054 90.192
(像シフト時の諸量)
広角端状態 中間焦点距離状態 望遠端状態
f 30.785 100.428 260.003
シフトレンズ群の移動量 0.250 0.350 0.450
像の移動量 0.268 0.574 0.902
（条件式対応値）
（１） ＤＴ／ｆＴ ＝ ０．２３８
（２） （１−βＡ）×βＢ＝１．１（広角端状態）〜１．６（中間焦点距離状態）〜２．０（望遠端状態）
(Table 3)
(Overall specifications)
Wide-angle end state Intermediate focal length state Telephoto end state
f 30.785 100.428 260.003
2ω 73.0 23.4 9.2 °
FNO 3.6 5.2 6.2
(Lens data)
Surface number Curvature radius Surface spacing Abbe number Refractive index
1 113.0938 2.000 23.78 1.84666
2 77.8725 7.500 82.52 1.49782
3 -392.0046 0.100
4 63.1691 4.500 82.52 1.49782
5 144.9233 D1
6 187.1436 0.200 38.09 1.55389
7 160.7200 1.200 49.61 1.77250
8 19.5404 6.200
9 -57.2837 1.000 42.72 1.83481
10 89.0734 0.100
11 35.5271 4.500 23.78 1.84666
12 -48.5191 1.000
13 -27.5498 1.000 49.61 1.77250
14 274.0976 D2
15 0.0000 0.500 (Aperture stop S)
16 30.0000 4.000 55.34 1.67790
17 -79.6551 0.100
18 21.4733 4.500 82.52 1.49782
19 -131.3788 1.000 37.17 1.83400
20 29.5229 2.500
21 46.6074 3.200 49.52 1.74442
22 -50.5322 1.000 23.78 1.84666
23 -178.5738 2.500
24 -27.8094 1.000 42.72 1.83481
25 143.2554 D3
26 87.3995 4.500 55.34 1.67790
27 -21.0343 0.200
28 -102.6584 5.000 34.47 1.63980
29 -14.3797 1.000 42.72 1.83481
30 459.5424 BF
(Aspherical)
The lens surfaces of the sixth surface, the twenty-first surface, the twenty-sixth surface, and the twenty-seventh surface are aspheric surfaces, and the aspheric coefficients are shown below.
Face κ C 4 C 6
6 1.0000 3.4488E-06 3.5836E-09 -1.8482E-11 1.2823E-13
21 -5.3475 3.9544E-06 -2.1153E-09 1.2308E-11 1.8147E-13
26 -18.7137 -9.3928E-06 -7.6348E-09 1.4059E-10 0.0000E-00
27 0.7025 4.8101E-06 -1.1899E-08 1.9145E-10 -3.9880E-13
(Variable interval data)
The variable interval when changing the focal length is shown below.
Wide-angle end state Intermediate focal length state Telephoto end state
f 30.785 100.428 260.003
D1 1.791 38.386 61.905
D2 28.018 13.045 2.372
D3 6.467 2.421 1.544
BF 42.136 72.054 90.192
(Various amounts during image shift)
Wide-angle end state Intermediate focal length state Telephoto end state
f 30.785 100.428 260.003
Shift lens group travel 0.250 0.350 0.450
Image travel 0.268 0.574 0.902
(Values for conditional expressions)
(1) DT / fT = 0.238
(2) (1-βA) × βB = 1.1 (wide-angle end state) to 1.6 (intermediate focal length state) to 2.0 (telephoto end state)
図１０より図１２は、本発明の第３実施例にかかるズームレンズの無限遠合焦状態におけるｄ線（波長５８７．６ｎｍ）での諸収差図をそれぞれ示す。図１０（ａ）、（ｂ）は広角端状態（ｆ＝30.8）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図１１（ａ）、（ｂ）は中間焦点距離状態（ｆ＝100.4）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図１２（ａ）、（ｂ）は望遠端状態（ｆ＝260.0）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。 10 to 12 are graphs showing various aberrations at the d-line (wavelength 587.6 nm) in the infinitely focused state of the zoom lens according to the third example of the present invention. FIGS. 10A and 10B are graphs showing various aberrations in the wide-angle end state (f = 30.8), FIG. 10A is a diagram showing various aberrations during non-vibration prevention, and FIG. Each is shown. FIGS. 11A and 11B are graphs showing various aberrations in the intermediate focal length state (f = 100.4), FIG. 11A is a diagram showing various aberrations during non-vibration prevention, and FIG. Respectively. FIGS. 12A and 12B are graphs showing various aberrations in the telephoto end state (f = 260.0), FIG. 12A is a diagram showing various aberrations during non-vibration prevention, and FIG. Each is shown.
各収差図から、本第３実施例は諸収差が良好に補正され、優れた結像性能を有している
ことは明らかである。
From each aberration diagram, it is apparent that the third embodiment has excellent imaging performance with various aberrations corrected well.
（第４実施例）
図１３は、本発明の第４実施例によるズームレンズの断面図を示している。
(Fourth embodiment)
FIG. 13 is a sectional view of a zoom lens according to the fourth embodiment of the present invention.
図１３において、物体側より順に、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、正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とを有し、広角端状態から望遠端状態までレンズ位置状態が変化する際に、前記第１レンズ群Ｇ１と前記第２レンズ群Ｇ２との間隔が増大し、前記第２レンズ群Ｇ２と前記第３レンズ群Ｇ３との間隔が減少し、前記第３レンズ群Ｇ３と前記第４レンズ群Ｇ４との間隔が減少するように、前記第１レンズ群Ｇ１乃至前記第４レンズ群Ｇ４が移動するようにズームレンズが構成されている。符号Ｉは、像面を示している。 In FIG. 13, 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, a third lens group G3 having a positive refractive power, and a positive When the lens position state changes from the wide-angle end state to the telephoto end state, the distance between the first lens group G1 and the second lens group G2 increases. The first lens groups G1 to G1 are arranged such that the distance between the second lens group G2 and the third lens group G3 is decreased, and the distance between the third lens group G3 and the fourth lens group G4 is decreased. The zoom lens is configured so that the fourth lens group G4 moves. Reference numeral I indicates an image plane.
また、第３レンズ群Ｇ３は、物体側から順に、正の屈折力を有する第３Ａ群と、正の屈折力を有する第３Ｂ群と、負の屈折力を有する第３Ｃ群とから成り、第３Ｂ群をシフトレンズ群として光軸に垂直に移動させ像シフトを可能としている。 The third lens group G3 includes, in order from the object side, a third A group having a positive refractive power, a third B group having a positive refractive power, and a third C group having a negative refractive power. The 3B group is moved as a shift lens group perpendicularly to the optical axis to enable image shift.
第１レンズ群Ｇ１は、物体側に凸面を向けた負メニスカスレンズＬ１１と両凸形状の正レンズＬ１２との接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ１３とから構成されている。 The first lens group G1 includes a cemented lens of a negative meniscus lens L11 having a convex surface facing the object side and a biconvex positive lens L12, and a positive meniscus lens L13 having a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ２１と両凹形状の負レンズＬ２２と両凸形状の正レンズＬ２３と両凹形状の負レンズＬ２４とから構成されている。 The second lens group G2 includes a negative meniscus lens L21 having a convex surface directed toward the object side, a biconcave negative lens L22, a biconvex positive lens L23, and a biconcave negative lens L24.
第３レンズ群Ｇ３は、両凸形状の正レンズＬ３１と、両凸形状の正レンズＬ３２と両凹形状の負レンズＬ３３との接合レンズとからなる第３Ａ群と、両凸形状の正レンズＬ３４と物体側に凹面を向けた負メニスカスレンズＬ３５との接合レンズからなる第３Ｂ群と、両凹形状の負レンズＬ３６からなる第３Ｃ群とから構成されている。 The third lens group G3 includes a biconvex positive lens L31, a third lens group consisting of a cemented lens of a biconvex positive lens L32 and a biconcave negative lens L33, and a biconvex positive lens L34. And a third B group consisting of a cemented lens with a negative meniscus lens L35 having a concave surface facing the object side, and a third C group consisting of a biconcave negative lens L36.
第４レンズ群Ｇ４は、両凸形状の正レンズＬ４１と、物体側に凹面を向けた正メニスカスレンズＬ４２と両凹形状の負レンズＬ４３との接合レンズとから構成されている。 The fourth lens group G4 includes a biconvex positive lens L41, and a cemented lens of a positive meniscus lens L42 having a concave surface facing the object side and a biconcave negative lens L43.
また、開口絞りＳは第３レンズ群Ｇ３の最も物体側のレンズ面の近傍に設けられ、変倍の際に第３レンズ群Ｇ３と共に移動する。 The aperture stop S is provided in the vicinity of the lens surface closest to the object side of the third lens group G3, and moves together with the third lens group G3 during zooming.
以下の表４に本発明の第４実施例にかかるズームレンズの諸元の値を掲げる。 Table 4 below provides values of specifications of the zoom lens according to the fourth example of the present invention.
（表４）
（全体諸元）
広角端状態 中間焦点距離状態 望遠端状態
f 29.000 105.000 288.000
２ω 76.0 22.4 8.3°
FNO 3.6 5.4 5.9
（レンズデータ）
面番号 曲率半径 面間隔 アッベ数 屈折率
1 126.4186 2.000 32.35 1.85026
2 70.0034 8.500 82.52 1.49782
3 -481.5412 0.100
4 61.9364 6.300 82.52 1.49782
5 326.2642 D1
6 206.3466 0.200 38.09 1.55389
7 155.0000 1.200 49.61 1.77250
8 19.2055 6.400
9 -48.3934 1.000 42.72 1.83481
10 89.2606 0.100
11 36.1705 4.800 23.78 1.84666
12 -41.8254 1.000
13 -25.8295 1.000 49.61 1.77250
14 197.7146 D2
15 0.0000 0.500 （開口絞りＳ）
16 28.1052 4.500 55.34 1.67790
17 -110.1068 0.100
18 27.8213 5.000 82.52 1.49782
19 -58.2729 1.000 37.17 1.83400
20 41.8777 3.800
21 42.5913 3.800 49.16 1.74001
22 -57.2086 1.000 23.78 1.84666
23 -230.3293 2.700
24 -30.2739 1.000 42.72 1.83481
25 217.1532 D3
26 55.2978 5.800 54.61 1.67440
27 -24.3191 0.150
28 -82.9547 6.500 34.47 1.63980
29 -14.5022 1.000 42.72 1.83481
30 499.5854 BF
（非球面係数）
６面、２１面、２６面、および２７面の各レンズ面は非球面であり、以下に非球面係数を示す。
面 κ C 4 C 6 C 8 C10
6 1.0000 4.0183E-06 4.0686E-09 -2.4754E-11 1.5099E-13
21 -0.4310 -1.3165E-07 -4.2138E-09 3.4757E-11 1.0724E-13
26 -12.7409 9.5672E-07 -4.9808E-09 1.4920E-10 0.0000E-00
27 0.1485 5.5835E-06 -1.4084E-08 2.1151E-10 -4.0383E-13
（可変間隔データ）
焦点距離を変化させる際の可変間隔を以下に示す。
広角端状態 中間焦点距離状態 望遠端状態
f 29.000 105.000 288.000
D1 1.813 16.856 61.926
D2 27.746 19.801 2.100
D3 5.887 3.883 0.965
BF 39.504 54.503 89.559
(像シフト時の諸量)
広角端状態 中間焦点距離状態 望遠端状態
f 29.000 105.000 288.000
シフトレンズ群の移動量 0.250 0.350 0.450
像の移動量 0.277 0.632 0.960
（条件式対応値）
（１） ＤＴ／ｆＴ ＝ ０．１７９
（２） （１−βＡ）×βＢ＝１．１(広角端状態)〜１．８(中間焦点距離状態)〜２．１(望遠端状態)
(Table 4)
(Overall specifications)
Wide-angle end state Intermediate focal length state Telephoto end state
f 29.000 105.000 288.000
2ω 76.0 22.4 8.3 °
FNO 3.6 5.4 5.9
(Lens data)
Surface number Curvature radius Surface spacing Abbe number Refractive index
1 126.4186 2.000 32.35 1.85026
2 70.0034 8.500 82.52 1.49782
3 -481.5412 0.100
4 61.9364 6.300 82.52 1.49782
5 326.2642 D1
6 206.3466 0.200 38.09 1.55389
7 155.0000 1.200 49.61 1.77250
8 19.2055 6.400
9 -48.3934 1.000 42.72 1.83481
10 89.2606 0.100
11 36.1705 4.800 23.78 1.84666
12 -41.8254 1.000
13 -25.8295 1.000 49.61 1.77250
14 197.7146 D2
15 0.0000 0.500 (Aperture stop S)
16 28.1052 4.500 55.34 1.67790
17 -110.1068 0.100
18 27.8213 5.000 82.52 1.49782
19 -58.2729 1.000 37.17 1.83400
20 41.8777 3.800
21 42.5913 3.800 49.16 1.74001
22 -57.2086 1.000 23.78 1.84666
23 -230.3293 2.700
24 -30.2739 1.000 42.72 1.83481
25 217.1532 D3
26 55.2978 5.800 54.61 1.67440
27 -24.3191 0.150
28 -82.9547 6.500 34.47 1.63980
29 -14.5022 1.000 42.72 1.83481
30 499.5854 BF
(Aspheric coefficient)
The 6th, 21st, 26th, and 27th lens surfaces are aspherical, and the aspherical coefficients are shown below.
Face κ C 4 C 6
6 1.0000 4.0183E-06 4.0686E-09 -2.4754E-11 1.5099E-13
21 -0.4310 -1.3165E-07 -4.2138E-09 3.4757E-11 1.0724E-13
26 -12.7409 9.5672E-07 -4.9808E-09 1.4920E-10 0.0000E-00
27 0.1485 5.5835E-06 -1.4084E-08 2.1151E-10 -4.0383E-13
(Variable interval data)
The variable interval when changing the focal length is shown below.
Wide-angle end state Intermediate focal length state Telephoto end state
f 29.000 105.000 288.000
D1 1.813 16.856 61.926
D2 27.746 19.801 2.100
D3 5.887 3.883 0.965
BF 39.504 54.503 89.559
(Various amounts during image shift)
Wide-angle end state Intermediate focal length state Telephoto end state
f 29.000 105.000 288.000
Shift lens group travel 0.250 0.350 0.450
Image travel 0.277 0.632 0.960
(Values for conditional expressions)
(1) DT / fT = 0.179
(2) (1-βA) × βB = 1.1 (wide-angle end state) to 1.8 (intermediate focal length state) to 2.1 (telephoto end state)
図１４より図１６は、本発明の第４実施例にかかるズームレンズの無限遠合焦状態におけるｄ線（波長５８７．６ｎｍ）での諸収差図をそれぞれ示す。図１４（ａ）、（ｂ）は広角端状態（ｆ＝29.0）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図１５（ａ）、（ｂ）は中間焦点距離状態（ｆ＝105.0）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図１６（ａ）、（ｂ）は望遠端状態（ｆ＝288.0）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。 FIGS. 14 to 16 are graphs showing various aberrations at the d-line (wavelength 587.6 nm) in the infinitely focused state of the zoom lens according to the fourth example of the present invention. FIGS. 14A and 14B are graphs showing various aberrations in the wide-angle end state (f = 29.0), FIG. 14A is a diagram showing various aberrations during non-vibration prevention, and FIG. Each is shown. FIGS. 15A and 15B are graphs showing various aberrations in the intermediate focal length state (f = 105.0), FIG. 15A is a diagram showing various aberrations during non-vibration prevention, and FIG. Respectively. FIGS. 16A and 16B are graphs showing various aberrations in the telephoto end state (f = 288.0), FIG. 16A is a diagram showing various aberrations during non-vibration prevention, and FIG. Each is shown.
各収差図から、本第４実施例は諸収差が良好に補正され、優れた結像性能を有している
ことは明らかである。
From the respective aberration diagrams, it is clear that the fourth embodiment has excellent imaging performance with various aberrations corrected well.
（第５実施例）
図１７は、本発明の第５実施例によるズームレンズの断面図を示している。
(5th Example)
FIG. 17 is a sectional view of a zoom lens according to the fifth embodiment of the present invention.
図１７において、物体側より順に、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、正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とを有し、広角端状態から望遠端状態までレンズ位置状態が変化する際に、前記第１レンズ群Ｇ１と前記第２レンズ群Ｇ２との間隔が増大し、前記第２レンズ群Ｇ２と前記第３レンズ群Ｇ３との間隔が減少し、前記第３レンズ群Ｇ３と前記第４レンズ群Ｇ４との間隔が減少するように、前記第１レンズ群Ｇ１乃至前記第４レンズ群Ｇ４が移動するようにズームレンズが構成されている。符号Ｉは、像面を示している。 In FIG. 17, 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, a third lens group G3 having a positive refractive power, and a positive When the lens position state changes from the wide-angle end state to the telephoto end state, the distance between the first lens group G1 and the second lens group G2 increases. The first lens groups G1 to G1 are arranged such that the distance between the second lens group G2 and the third lens group G3 is decreased, and the distance between the third lens group G3 and the fourth lens group G4 is decreased. The zoom lens is configured so that the fourth lens group G4 moves. Reference numeral I indicates an image plane.
また、第３レンズ群Ｇ３は、物体側から順に、正の屈折力を有する第３Ａ群と、正の屈折力を有する第３Ｂ群と、負の屈折力を有する第３Ｃ群とから成り、第３Ｂ群をシフトレンズ群として光軸に垂直に移動させ像シフトを可能としている。 The third lens group G3 includes, in order from the object side, a third A group having a positive refractive power, a third B group having a positive refractive power, and a third C group having a negative refractive power. The 3B group is moved as a shift lens group perpendicularly to the optical axis to enable image shift.
第１レンズ群Ｇ１は、物体側に凸面を向けた負メニスカスレンズＬ１１と両凸形状の正レンズＬ１２との接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ１３とから構成されている。 The first lens group G1 includes a cemented lens of a negative meniscus lens L11 having a convex surface facing the object side and a biconvex positive lens L12, and a positive meniscus lens L13 having a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ２１と両凹形状の負レンズＬ２２と両凸形状の正レンズＬ２３と両凹形状の負レンズＬ２４とから構成されている。 The second lens group G2 includes a negative meniscus lens L21 having a convex surface directed toward the object side, a biconcave negative lens L22, a biconvex positive lens L23, and a biconcave negative lens L24.
第３レンズ群Ｇ３は、両凸形状の正レンズＬ３１と、両凸形状の正レンズＬ３２と両凹形状の負レンズＬ３３との接合レンズとからなる第３Ａ群と、両凸形状の正レンズＬ３４と物体側に凹面を向けた負メニスカスレンズＬ３５との接合レンズからなる第３Ｂ群と、両凹形状の負レンズＬ３６からなる第３Ｃ群とから構成されている。 The third lens group G3 includes a biconvex positive lens L31, a third lens group consisting of a cemented lens of a biconvex positive lens L32 and a biconcave negative lens L33, and a biconvex positive lens L34. And a third B group consisting of a cemented lens with a negative meniscus lens L35 having a concave surface facing the object side, and a third C group consisting of a biconcave negative lens L36.
第４レンズ群Ｇ４は、両凸形状の正レンズＬ４１と、物体側に凹面を向けた負メニスカスレンズＬ４２とから構成されている。 The fourth lens group G4 includes a biconvex positive lens L41 and a negative meniscus lens L42 having a concave surface directed toward the object side.
また、開口絞りＳは第３レンズ群Ｇ３の最も物体側のレンズ面の近傍に設けられ、変倍の際に第３レンズ群Ｇ３と共に移動する。 The aperture stop S is provided in the vicinity of the lens surface closest to the object side of the third lens group G3, and moves together with the third lens group G3 during zooming.
以下の表５に本発明の第５実施例にかかるズームレンズの諸元の値を掲げる。 Table 5 below provides values of specifications of the zoom lens according to the fifth example of the present invention.
（表５）
広角端状態 中間焦点距離状態 望遠端状態
f 28.743 99.628 289.713
２ω 77.0 23.7 8.3°
FNO 3.5 5.4 6.3
（レンズデータ）
面番号 曲率半径 面間隔 アッベ数 屈折率
1 94.4674 1.900 23.78 1.84666
2 67.7698 7.500 81.61 1.49700
3 -529.7017 0.100
4 60.3188 4.800 81.61 1.49700
5 135.6483 D1
6 111.7769 0.200 38.09 1.55389
7 105.1950 1.150 49.61 1.77250
8 16.3778 5.800
9 -44.8931 1.000 46.63 1.81600
10 98.5517 0.100
11 32.0133 4.200 22.76 1.80809
12 -49.2124 1.100
13 -27.3224 0.900 42.72 1.83481
14 1744.7263 D2
15 0.0000 0.500 （開口絞りＳ）
16 32.4669 4.500 64.14 1.51633
17 -42.3952 0.100
18 37.5370 5.000 81.61 1.49700
19 -27.2467 1.000 37.17 1.83400
20 159.3545 3.000
21 60.0000 3.500 58.54 1.65160
22 -27.9361 0.800 46.63 1.81600
23 -57.3368 4.200
24 -36.9720 0.800 54.66 1.72916
25 120.8635 D3
26 150.0000 4.500 55.18 1.66547
27 -39.3664 8.000
28 -40.0000 1.000 54.66 1.72916
29 -62.5642 BF
（非球面係数）
第６面、第１６面、第２１面、第２７面、および第２８面の各レンズ面は非球面であり、以下に非球面係数を示す。
面 κ C 4 C 6 C 8 C10
6 6.0000 2.1440E-06 2.0424E-09 -5.7444E-11 2.0549E-13
16 0.4048 1.6192E-06 8.8809E-09 0.0000E-00 0.0000E-00
21 0.1975 -1.2413E-07 4.8313E-09 0.0000E-00 0.0000E-00
27 -0.2523 7.8933E-07 4.3698E-09 1.0465E-11 0.0000E-00
28 1.5241 -6.4146E-06 -1.2538E-08 3.8377E-13 0.0000E-00
（可変間隔データ）
焦点距離を変化させる際の可変間隔を以下に示す。
広角端状態 中間焦点距離状態 望遠端状態
f 28.743 99.628 289.713
D1 2.160 36.094 61.516
D2 25.560 10.629 0.005
D3 11.051 3.584 2.629
BF 37.502 75.686 91.283
(像シフト時の諸量)
広角端状態 中間焦点距離状態 望遠端状態
f 28.743 99.628 289.713
シフトレンズ群の移動量 0.250 0.350 0.450
像の移動量 0.287 0.643 0.966
（条件式対応値）
（１） ＤＴ／ｆＴ ＝ ０．２１２
（２） （１−βＡ）×βＢ＝１．１（広角端状態）〜１．８（中間焦点距離状態）〜２．１（望遠端状態）
(Table 5)
Wide-angle end state Intermediate focal length state Telephoto end state
f 28.743 99.628 289.713
2ω 77.0 23.7 8.3 °
FNO 3.5 5.4 6.3
(Lens data)
Surface number Curvature radius Surface spacing Abbe number Refractive index
1 94.4674 1.900 23.78 1.84666
2 67.7698 7.500 81.61 1.49700
3 -529.7017 0.100
4 60.3188 4.800 81.61 1.49700
5 135.6483 D1
6 111.7769 0.200 38.09 1.55389
7 105.1950 1.150 49.61 1.77250
8 16.3778 5.800
9 -44.8931 1.000 46.63 1.81600
10 98.5517 0.100
11 32.0133 4.200 22.76 1.80809
12 -49.2124 1.100
13 -27.3224 0.900 42.72 1.83481
14 1744.7263 D2
15 0.0000 0.500 (Aperture stop S)
16 32.4669 4.500 64.14 1.51633
17 -42.3952 0.100
18 37.5370 5.000 81.61 1.49700
19 -27.2467 1.000 37.17 1.83400
20 159.3545 3.000
21 60.0000 3.500 58.54 1.65160
22 -27.9361 0.800 46.63 1.81600
23 -57.3368 4.200
24 -36.9720 0.800 54.66 1.72916
25 120.8635 D3
26 150.0000 4.500 55.18 1.66547
27 -39.3664 8.000
28 -40.0000 1.000 54.66 1.72916
29 -62.5642 BF
(Aspheric coefficient)
The lens surfaces of the sixth surface, the sixteenth surface, the twenty-first surface, the twenty-seventh surface, and the twenty-eighth surface are aspheric surfaces, and the aspheric coefficients are shown below.
Face κ C 4 C 6
6 6.0000 2.1440E-06 2.0424E-09 -5.7444E-11 2.0549E-13
16 0.4048 1.6192E-06 8.8809E-09 0.0000E-00 0.0000E-00
21 0.1975 -1.2413E-07 4.8313E-09 0.0000E-00 0.0000E-00
27 -0.2523 7.8933E-07 4.3698E-09 1.0465E-11 0.0000E-00
28 1.5241 -6.4146E-06 -1.2538E-08 3.8377E-13 0.0000E-00
(Variable interval data)
The variable interval when changing the focal length is shown below.
Wide-angle end state Intermediate focal length state Telephoto end state
f 28.743 99.628 289.713
D1 2.160 36.094 61.516
D2 25.560 10.629 0.005
D3 11.051 3.584 2.629
BF 37.502 75.686 91.283
(Various amounts during image shift)
Wide-angle end state Intermediate focal length state Telephoto end state
f 28.743 99.628 289.713
Shift lens group travel 0.250 0.350 0.450
Image travel 0.287 0.643 0.966
(Values for conditional expressions)
(1) DT / fT = 0.212
(2) (1-βA) × βB = 1.1 (wide-angle end state) to 1.8 (intermediate focal length state) to 2.1 (telephoto end state)
図１８より図２０は、本発明の第５実施例にかかるズームレンズの無限遠合焦状態においてｄ線（波長５８７．６ｎｍ）での諸収差図をそれぞれ示す。図１８（ａ）、（ｂ）は広角端状態（ｆ＝28.7）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図１９（ａ）、（ｂ）は中間焦点距離状態（ｆ＝99.6）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図２０（ａ）、（ｂ）は望遠端状態（ｆ＝289.7）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。 FIGS. 18 to 20 are graphs showing various aberrations at the d-line (wavelength 587.6 nm) in the infinite focus state of the zoom lens according to the fifth example of the present invention. 18A and 18B are graphs showing various aberrations in the wide-angle end state (f = 28.7), FIG. 18A is a diagram showing various aberrations during non-vibration prevention, and FIG. 18B is a diagram showing lateral aberration during vibration isolation. Each is shown. 19A and 19B are graphs showing various aberrations in the intermediate focal length state (f = 99.6), FIG. 19A is a diagram showing various aberrations during non-vibration prevention, and FIG. Respectively. FIGS. 20A and 20B are graphs showing various aberrations in the telephoto end state (f = 289.7), FIG. 20A is a diagram showing various aberrations during non-vibration prevention, and FIG. Each is shown.
各収差図から、本第５実施例は諸収差が良好に補正され、優れた結像性能を有していることは明らかである。 From the respective aberration diagrams, it is clear that the fifth embodiment has excellent imaging performance with various aberrations corrected satisfactorily.
（第６実施例）
図２１は、本発明の第６実施例によるズームレンズの断面図を示している。
(Sixth embodiment)
FIG. 21 shows a sectional view of a zoom lens according to the sixth embodiment of the present invention.
図２１において、物体側より順に、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、正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とを有し、広角端状態から望遠端状態までレンズ位置状態が変化する際に、前記第１レンズ群Ｇ１と前記第２レンズ群Ｇ２との間隔が増大し、前記第２レンズ群Ｇ２と前記第３レンズ群Ｇ３との間隔が減少し、前記第３レンズ群Ｇ３と前記第４レンズ群Ｇ４との間隔が減少するように、前記第１レンズ群Ｇ１乃至前記第４レンズ群Ｇ４が移動するようにズームレンズが構成されている。符号Ｉは、像面を示している。 In FIG. 21, 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, a third lens group G3 having a positive refractive power, and a positive When the lens position state changes from the wide-angle end state to the telephoto end state, the distance between the first lens group G1 and the second lens group G2 increases. The first lens groups G1 to G1 are arranged such that the distance between the second lens group G2 and the third lens group G3 is decreased, and the distance between the third lens group G3 and the fourth lens group G4 is decreased. The zoom lens is configured so that the fourth lens group G4 moves. Reference numeral I indicates an image plane.
また、第３レンズ群Ｇ３は、物体側から順に、正の屈折力を有する第３Ａ群と、正の屈折力を有する第３Ｂ群と、負の屈折力を有する第３Ｃ群とから成り、第３Ｂ群をシフトレンズ群として光軸に垂直に移動させ像シフトを可能としている。 The third lens group G3 includes, in order from the object side, a third A group having a positive refractive power, a third B group having a positive refractive power, and a third C group having a negative refractive power. The 3B group is moved as a shift lens group perpendicularly to the optical axis to enable image shift.
第１レンズ群Ｇ１は、物体側に凸面を向けた負メニスカスレンズＬ１１と両凸形状の正レンズＬ１２との接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ１３とから構成されている。 The first lens group G1 includes a cemented lens of a negative meniscus lens L11 having a convex surface facing the object side and a biconvex positive lens L12, and a positive meniscus lens L13 having a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ２１と、両凹形状の負レンズＬ２２と、両凸形状の正レンズＬ２３と、物体側に凹面を向けた負メニスカスレンズＬ２４とから構成されている。 The second lens group G2 includes a negative meniscus lens L21 having a convex surface facing the object side, a biconcave negative lens L22, a biconvex positive lens L23, and a negative meniscus lens L24 having a concave surface facing the object side. It is composed of
第３レンズ群Ｇ３は、両凸形状の正レンズＬ３１と、物体側に凸面を向けた正メニスカスレンズＬ３２と、両凹形状の負レンズＬ３３とからなる第３Ａ群と、両凸形状の正レンズＬ３４と物体側に凹面を向けた負メニスカスレンズＬ３５との接合レンズからなる第３Ｂ群と、物体側に凹面を向けた負メニスカスレンズＬ３６からなる第３Ｃ群とから構成されている。
The third lens group G3 includes a third convex lens L31 having a biconvex shape, a positive meniscus lens L32 having a convex surface directed toward the object side, and a negative lens L33 having a biconcave shape, and a biconvex positive lens. The third lens unit B includes a third lens unit B including a cemented lens of
第４レンズ群Ｇ４は、両凸形状の正レンズＬ４１と、物体側に凹面を向けた正メニスカスレンズＬ４２と物体側に凹面を向けた負メニスカスレンズＬ４３との接合レンズとから構成されている。 The fourth lens group G4 includes a biconvex positive lens L41, a cemented lens of a positive meniscus lens L42 having a concave surface facing the object side, and a negative meniscus lens L43 having a concave surface facing the object side.
また、開口絞りＳは第３レンズ群Ｇ３の最も物体側のレンズ面の近傍に設けられ、変倍の際に第３レンズ群Ｇ３と共に移動する。 The aperture stop S is provided in the vicinity of the lens surface closest to the object side of the third lens group G3, and moves together with the third lens group G3 during zooming.
以下の表６に、本発明の第６実施例にかかるズームレンズの諸元の値を掲げる。 Table 6 below provides values of specifications of the zoom lens according to the sixth example of the present invention.
（表６）
（全体諸元）
広角端状態 中間焦点距離状態 望遠端状態
f 28.800 100.001 287.999
２ω 77.0 23.7 8.3°
FNO 3.6 5.5 5.8
（レンズデータ）
面番号 曲率半径 面間隔 アッベ数 屈折率
1 115.6310 1.800 28.56 1.79504
2 71.8788 7.200 81.61 1.49700
3 -555.2835 0.100
4 65.0392 5.500 81.61 1.49700
5 232.0570 D1
6 512.2381 0.100 38.09 1.55389
7 180.0000 1.200 53.85 1.71300
8 18.5968 6.500
9 -50.4004 1.000 42.72 1.83481
10 63.9703 0.100
11 39.9492 4.600 23.78 1.84666
12 -50.7514 1.500
13 -25.9825 0.900 49.61 1.77250
14 -100.6446 D2
15 0.0000 0.500 （開口絞りＳ）
16 22.7861 6.000 81.61 1.49700
17 -76.8308 0.100
18 27.0706 4.000 90.30 1.45600
19 304.3279 2.350
20 -54.3445 0.800 40.77 1.88300
21 95.0234 3.150
22 33.1566 4.500 61.18 1.58913
23 -72.2937 0.800 23.78 1.84666
24 -194.8570 6.700
25 -22.3588 0.800 37.17 1.83400
26 -167.7429 D3
27 730.6059 2.800 49.32 1.74320
28 -40.4002 0.100
29 -120.1675 7.400 36.26 1.62004
30 -16.1891 1.000 46.63 1.81600
31 -45.2280 BF
（非球面係数）
第６面、第２２面、第２８面の各レンズ面は非球面であり、非球面係数を意亜Ｋに示す．
面 κ C 4 C 6 C 8 C10
6 1.0000 5.6868E-06 6.5389E-09 -6.8904E-11 1.5909E-13
22 1.0000 -5.2152E-06 1.2238E-08 6.5604E-11 -4.4646E-13
28 1.0000 1.4105E-05 3.3242E-08 -8.4679E-11 3.5821E-13
（可変間隔データ）
焦点距離を変化させる際の可変間隔を以下に示す。
広角端状態 中間焦点距離状態 望遠端状態
f 28.800 100.001 287.999
D1 1.528 32.944 62.211
D2 33.290 14.442 2.102
D3 4.508 1.422 0.946
BF 38.606 82.076 93.134
(像シフト時の諸量)
広角端状態 中間焦点距離状態 望遠端状態
f 28.800 100.001 287.999
シフトレンズ群の移動量 0.250 0.350 0.450
像の移動量 0.272 0.652 0.934
（条件式対応値）
（１） ＤＴ／ｆＴ ＝ ０．２１６
（２） （１−βＡ）×βＢ＝１．１（広角端状態）〜１．９（中間焦点距離状態）〜２．１（望遠端状態）
(Table 6)
(Overall specifications)
Wide-angle end state Intermediate focal length state Telephoto end state
f 28.800 100.001 287.999
2ω 77.0 23.7 8.3 °
FNO 3.6 5.5 5.8
(Lens data)
Surface number Curvature radius Surface spacing Abbe number Refractive index
1 115.6310 1.800 28.56 1.79504
2 71.8788 7.200 81.61 1.49700
3 -555.2835 0.100
4 65.0392 5.500 81.61 1.49700
5 232.0570 D1
6 512.2381 0.100 38.09 1.55389
7 180.0000 1.200 53.85 1.71300
8 18.5968 6.500
9 -50.4004 1.000 42.72 1.83481
10 63.9703 0.100
11 39.9492 4.600 23.78 1.84666
12 -50.7514 1.500
13 -25.9825 0.900 49.61 1.77250
14 -100.6446 D2
15 0.0000 0.500 (Aperture stop S)
16 22.7861 6.000 81.61 1.49700
17 -76.8308 0.100
18 27.0706 4.000 90.30 1.45600
19 304.3279 2.350
20 -54.3445 0.800 40.77 1.88300
21 95.0234 3.150
22 33.1566 4.500 61.18 1.58913
23 -72.2937 0.800 23.78 1.84666
24 -194.8570 6.700
25 -22.3588 0.800 37.17 1.83400
26 -167.7429 D3
27 730.6059 2.800 49.32 1.74320
28 -40.4002 0.100
29 -120.1675 7.400 36.26 1.62004
30 -16.1891 1.000 46.63 1.81600
31 -45.2280 BF
(Aspheric coefficient)
The sixth, twenty-second and twenty-eighth lens surfaces are aspherical surfaces, and the aspherical coefficients are shown in Fig.
Face κ C 4 C 6
6 1.0000 5.6868E-06 6.5389E-09 -6.8904E-11 1.5909E-13
22 1.0000 -5.2152E-06 1.2238E-08 6.5604E-11 -4.4646E-13
28 1.0000 1.4105E-05 3.3242E-08 -8.4679E-11 3.5821E-13
(Variable interval data)
The variable interval when changing the focal length is shown below.
Wide-angle end state Intermediate focal length state Telephoto end state
f 28.800 100.001 287.999
D1 1.528 32.944 62.211
D2 33.290 14.442 2.102
D3 4.508 1.422 0.946
BF 38.606 82.076 93.134
(Various amounts during image shift)
Wide-angle end state Intermediate focal length state Telephoto end state
f 28.800 100.001 287.999
Shift lens group travel 0.250 0.350 0.450
Image travel 0.272 0.652 0.934
(Values for conditional expressions)
(1) DT / fT = 0.216
(2) (1-βA) × βB = 1.1 (wide-angle end state) to 1.9 (intermediate focal length state) to 2.1 (telephoto end state)
図２２より図２４は、本発明の第６実施例にかかるズームレンズの無限遠合焦状態におけるｄ線での諸収差図をそれぞれ示す。図２２（ａ）、（ｂ）は広角端状態（ｆ＝28.8）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図２３（ａ）、（ｂ）は中間焦点距離状態（ｆ＝100.0）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。図２４（ａ）、（ｂ）は望遠端状態（ｆ＝288.0）の諸収差図で、（ａ）は非防振時の諸収差図を、（ｂ）は防振時の横収差図をそれぞれ示している。 22 to 24 are graphs showing various aberrations at the d-line in the infinitely focused state of the zoom lens according to Example 6 of the present invention. FIGS. 22A and 22B are graphs showing various aberrations in the wide-angle end state (f = 28.8), FIG. 22A is a diagram showing various aberrations during non-vibration prevention, and FIG. Each is shown. FIGS. 23A and 23B are graphs showing various aberrations in the intermediate focal length state (f = 100.0), FIG. 23A is a diagram showing various aberrations during non-vibration stabilization, and FIG. 23B is a diagram showing lateral aberration during vibration isolation. Respectively. FIGS. 24A and 24B are graphs showing various aberrations in the telephoto end state (f = 288.0), FIG. 24A is a diagram showing various aberrations during non-vibration prevention, and FIG. Each is shown.
各収差図から、本第６実施例は諸収差が良好に補正され、優れた結像性能を有していることは明らかである。 From the respective aberration diagrams, it is clear that the sixth embodiment has excellent imaging performance with various aberrations corrected well.
なお、上述の実施の形態は例に過ぎず、上述の構成や形状に限定されるものではなく、本発明の範囲内において適宜修正、変更が可能である。 The above-described embodiment is merely an example, and is not limited to the above-described configuration or shape, and can be appropriately modified and changed within the scope 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
Ｓ ：開口絞り
Ｉ ：像面
G1: First lens group G2: Second lens group G3: Third lens group G4: Fourth lens group S: Aperture stop I: Image plane
Claims (8)
広角端状態から望遠端状態までレンズ位置状態が変化する際に、前記第１レンズ群と前記第２レンズ群との間隔が増大し、前記第２レンズ群と前記第３レンズ群との間隔が減少し、前記第３レンズ群と前記第４レンズ群との間隔が減少するように、前記第１レンズ群乃至前記第４レンズ群が移動し、
前記第２レンズ群は、少なくとも３枚の負レンズと１枚の正レンズとを有し、
前記第３レンズ群は、物体側より順に、正の屈折力を有する第３Ａ群と、正の屈折力を有する第３Ｂ群と、負の屈折力を有する第３Ｃ群とから成り、
前記第３Ａ群は、２枚の正レンズと１枚の負レンズとから成り、
前記第３Ｂ群をシフトレンズ群として、光軸と垂直方向に移動させることによって像をシフトし、
以下の条件式を満足することを特徴とする像シフト可能な高変倍光学系。
０．１２０ ＜ ＤＴ／ｆＴ ＜ ０．２４５
但し、
ＤＴ：望遠端状態における、前記第１レンズ群の最も像側のレンズ面と前記第２レンズ群の最も物体側のレンズ面との空気間隔
ｆＴ：望遠端状態の焦点距離 In order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens having a positive refractive power It consists of a group,
When the lens position state changes from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, and the distance between the second lens group and the third lens group increases. The first lens group to the fourth lens group move so that the distance between the third lens group and the fourth lens group decreases,
The second lens group has at least three negative lenses and one positive lens,
The third lens group includes, in order from the object side, a third A group having a positive refractive power, a third B group having a positive refractive power, and a third C group having a negative refractive power,
The third group A consists of two positive lenses and one negative lens,
The pre-Symbol the 3B group as a shift lens group, to shift the image by moving in a direction perpendicular to the optical axis,
An image-shiftable high-magnification optical system characterized by satisfying the following conditional expression:
0.120 <DT / fT <0.245
However,
DT: air distance between the most image side lens surface of the first lens group and the most object side lens surface of the second lens group in the telephoto end state fT: focal length in the telephoto end state
０．８ ＜ （１−βＡ）×βＢ ＜ ３．５
但し、
βＡ：前記シフトレンズ群の横倍率
βＢ：前記シフトレンズ群と像面との間にある光学要素の横倍率 2. The image-shiftable high variable magnification optical system according to claim 1, wherein the following conditional expression is satisfied.
0.8 <(1-βA) × βB <3.5
However,
βA: lateral magnification of the shift lens group βB: lateral magnification of the optical element between the shift lens group and the image plane
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003341903A JP4479204B2 (en) | 2003-09-30 | 2003-09-30 | Highly variable magnification optical system capable of image shift |
| US10/785,096 US7136231B2 (en) | 2003-02-27 | 2004-02-25 | Zoom lens system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003341903A JP4479204B2 (en) | 2003-09-30 | 2003-09-30 | Highly variable magnification optical system capable of image shift |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2005107280A JP2005107280A (en) | 2005-04-21 |
| JP2005107280A5 JP2005107280A5 (en) | 2008-04-10 |
| JP4479204B2 true JP4479204B2 (en) | 2010-06-09 |
Family
ID=34536348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003341903A Expired - Lifetime JP4479204B2 (en) | 2003-02-27 | 2003-09-30 | Highly variable magnification optical system capable of image shift |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4479204B2 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4959236B2 (en) * | 2006-06-21 | 2012-06-20 | 株式会社タムロン | High magnification zoom lens |
| JP4876755B2 (en) * | 2006-07-27 | 2012-02-15 | 株式会社ニコン | High magnification zoom lens and optical apparatus having the same |
| JP5042643B2 (en) * | 2007-01-22 | 2012-10-03 | パナソニック株式会社 | Zoom lens system, imaging device and camera |
| JP4951370B2 (en) | 2007-03-01 | 2012-06-13 | 株式会社タムロン | Zoom lens with image stabilization by lens eccentricity |
| JP5064837B2 (en) * | 2007-03-01 | 2012-10-31 | キヤノン株式会社 | Zoom lens with anti-vibration function |
| JP2009098458A (en) * | 2007-10-17 | 2009-05-07 | Olympus Imaging Corp | Zoom lens and imaging apparatus having the same |
| JP5305686B2 (en) * | 2008-02-20 | 2013-10-02 | オリンパスイメージング株式会社 | Zoom lens and imaging apparatus using the same |
| CN102089699B (en) * | 2008-07-09 | 2014-02-05 | 株式会社尼康 | Zoom lens, optical device having same, and zoom lens manufacturing method |
| JP5201460B2 (en) * | 2008-07-09 | 2013-06-05 | 株式会社ニコン | Zoom lens, optical apparatus having the same, and zooming method |
| JP5201461B2 (en) * | 2008-07-09 | 2013-06-05 | 株式会社ニコン | Zoom lens, optical apparatus having the same, and zooming method |
| JP5241377B2 (en) * | 2008-08-19 | 2013-07-17 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
| JP5224468B2 (en) * | 2009-05-12 | 2013-07-03 | 富士フイルム株式会社 | Zoom lens and imaging device |
| JP5628572B2 (en) * | 2009-07-03 | 2014-11-19 | パナソニック株式会社 | Zoom lens system, imaging device and camera |
| JP5678424B2 (en) * | 2009-11-26 | 2015-03-04 | 株式会社ニコン | Variable magnification optical system, optical apparatus equipped with the variable magnification optical system, and method of manufacturing the variable magnification optical system |
| US8913327B2 (en) | 2010-03-08 | 2014-12-16 | Nikon Corporation | Zoom lens system, optical apparatus and method for manufacturing zoom lens system |
| JP5742100B2 (en) * | 2010-03-08 | 2015-07-01 | 株式会社ニコン | Variable-magnification optical system, optical device, and variable-magnification optical system manufacturing method |
| JP2012159746A (en) * | 2011-02-01 | 2012-08-23 | Nikon Corp | Variable power optical system, optical apparatus, and method for manufacturing variable power optical system |
| JP5724189B2 (en) * | 2010-03-08 | 2015-05-27 | 株式会社ニコン | Variable magnification optical system, optical device |
| JP2011248219A (en) * | 2010-05-28 | 2011-12-08 | Tamron Co Ltd | High variable power zoom lens |
| JP2011248220A (en) * | 2010-05-28 | 2011-12-08 | Tamron Co Ltd | High variable power zoom lens |
-
2003
- 2003-09-30 JP JP2003341903A patent/JP4479204B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005107280A (en) | 2005-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4479204B2 (en) | Highly variable magnification optical system capable of image shift | |
| JP3352240B2 (en) | High zoom ratio zoom lens | |
| US20050219708A1 (en) | Zoom lens system | |
| JPH1195105A (en) | Focusing system for variable power optical system | |
| JP2003241097A (en) | High variable power ratio zoom lens | |
| JPH08248312A (en) | Zoom lens | |
| JPH1048518A (en) | Variable power optical system | |
| JPH08201695A (en) | Rear focus type zoom lens | |
| JPH08220438A (en) | Zoom lens focusable at short distance | |
| JPH11271614A (en) | Variable focus distance lens system | |
| JPH11258504A (en) | Vibration proof zoom lens | |
| JPH1048524A (en) | Variable power optical system 7 | |
| JP2000121942A (en) | Zoom lens | |
| JPH11305128A (en) | Variable focal distance lens system | |
| JPH1164732A (en) | Zoom lens | |
| JP3363688B2 (en) | Zoom lens | |
| JP2000284174A (en) | Zoom lens | |
| JP3753038B2 (en) | Zoom lens | |
| JPH07151971A (en) | Zoom lens | |
| JPH11160621A (en) | Zoom lens | |
| JP4876460B2 (en) | Zoom lens with image shift | |
| JP2000019398A (en) | Large aperture ratio inner focus type telephoto zoom lens | |
| US6661584B2 (en) | Zoom lens and camera having the zoom lens | |
| JP2001091830A (en) | Zoom lens | |
| JPH11142738A (en) | Variable focal-length lens system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20060828 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080225 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20091027 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20091224 |
|
| 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: 20100223 |
|
| 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: 20100308 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130326 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 4479204 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: 20130326 Year of fee payment: 3 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130326 Year of fee payment: 3 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130326 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130326 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140326 Year of fee payment: 4 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |