JPH10253867A - High power zoom lens - Google Patents
High power zoom lensInfo
- Publication number
- JPH10253867A JPH10253867A JP6039697A JP6039697A JPH10253867A JP H10253867 A JPH10253867 A JP H10253867A JP 6039697 A JP6039697 A JP 6039697A JP 6039697 A JP6039697 A JP 6039697A JP H10253867 A JPH10253867 A JP H10253867A
- Authority
- JP
- Japan
- Prior art keywords
- lens group
- cylinder
- barrel
- magnification
- cam
- 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
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、前玉フォーカス方式あ
るいは２群インナーフォーカス方式である高倍率ズーム
レンズであって、特に全長を短くした高倍率ズームレン
ズに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-magnification zoom lens having a front lens focus system or a two-group inner focus system, and more particularly to a high-magnification zoom lens having a reduced overall length.
【０００２】[0002]
【従来の技術とその問題点】例えばズーム倍率が３倍を
超える高倍率ズームレンズにおいては、レンズ群の移動
量が大きくなり、従来の固定筒ではその移動量をカバー
しきれないという問題があった。これを解決するために
固定筒を長くすると、合焦移動レンズ群を移動させるた
めの移動機構が大型化し、特に自動合焦に不利となる問
題があった。一方、カム筒の一定の角度範囲によってレ
ンズ群の大きな移動量を得ようとすると、光軸を含む平
面に対するカム溝の傾き角度が小さくなって、ズーム操
作環及びフォーカス操作環の軽く回転させてコマを移動
させることが困難になる問題がある。2. Description of the Related Art For example, in a high-magnification zoom lens having a zoom magnification exceeding 3 times, the amount of movement of the lens group becomes large, and the conventional fixed barrel cannot cover the amount of movement. Was. If the length of the fixed cylinder is increased to solve this problem, a moving mechanism for moving the focusing lens group becomes large, and there is a problem that it is disadvantageous particularly for automatic focusing. On the other hand, when trying to obtain a large amount of movement of the lens group within a certain angular range of the cam barrel, the inclination angle of the cam groove with respect to the plane including the optical axis becomes small, and the zoom operation ring and the focus operation ring are rotated slightly. There is a problem that it is difficult to move the frame.
【０００３】[0003]
【発明の目的】本発明は、従来の高倍率ズームレンズに
おいて考えられるこのような問題に鑑みてなされたもの
であって、全体をコンパクトにすることができ、しかも
光軸を含む平面に対するカム溝の傾き角度を大きくし
て、いずれの焦点距離においても小さな操作力によって
ズーム操作を滑らかに行うことができ、さらに合理的な
自動合焦機構を構成することができる、例えば２８ミリ
ないし３００ミリという高倍率を可能にする高倍率ズー
ムレンズを提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems which can be considered in a conventional high-magnification zoom lens, and has a compact cam groove with respect to a plane including an optical axis. , The zoom operation can be performed smoothly with a small operation force at any focal length, and a rational automatic focusing mechanism can be formed, for example, 28 mm to 300 mm. It is an object of the present invention to provide a high-magnification zoom lens that enables high magnification.
【０００４】[0004]
【発明の構成】本発明は、固定筒の内側及び外側に直進
筒を配置したことを特徴とする高倍率ズームレンズであ
る。本発明はまた、前玉フォーカスの高倍率ズームレン
ズであって、固定筒の内側に順次第１変倍カム筒、第２
変倍カム筒、及び第２直進筒を配置し、固定筒の外側に
順次フォーカスレンズ群移動筒、第１直進筒、及び第３
変倍カム筒を配置し、上記第２変倍カム筒に、フォーカ
スレンズ群移動筒、第１直進筒、及び第３変倍カム筒に
係合する第２変倍カム筒出力コマを設け、ズーム操作環
を回転させることによって、第１変倍カム筒を回転さ
せ、これによって第２変倍カム筒を直進回転させ、後レ
ンズ群を変位させ、第２変倍カム筒の直進回転を第２変
倍カム筒出力コマを介して伝達させ、前レンズ群移動筒
及び前レンズ群を直進させ、第１直進筒を直進させ、第
３変倍カムを回転させ、第３変倍カムの回転によって前
レンズ群を変位させ、フォーカス操作環の回転によって
フォーカスレンズ群を変位させることを特徴とする高倍
率ズームレンズ。The present invention is a high-magnification zoom lens characterized in that straight-moving barrels are arranged inside and outside a fixed barrel. The present invention also relates to a high-magnification zoom lens having a front lens focus, in which a first variable power cam cylinder and a second
A variable power cam barrel and a second rectilinear barrel are arranged, and the focus lens group moving barrel, the first rectilinear barrel, and the third
A variable power cam cylinder is disposed, and the second variable power cam cylinder is provided with a focus lens group moving cylinder, a first rectilinear moving cylinder, and a second variable power cam cylinder output piece engaged with the third variable power cam cylinder. By rotating the zoom operation ring, the first variable power cam cylinder is rotated, thereby rotating the second variable power cam cylinder linearly, displacing the rear lens group, and causing the second variable power cam cylinder to rotate linearly. The power is transmitted through a variable power cam barrel output frame, the front lens group moving cylinder and the front lens group are moved straight, the first straight moving cylinder is moved straight, the third variable power cam is rotated, and the third variable cam is rotated. A high-magnification zoom lens characterized in that the front lens group is displaced by the rotation of the focus operation ring and the focus lens group is displaced by the rotation of the focus operation ring.
【０００５】本発明の実施態様は、上記後レンズ群が、
第１後レンズ群及び第１後レンズ群からなり、第１後レ
ンズ群及び第１後レンズ群が上記第２変倍カム筒及び第
２直進筒の協働によって独立して変位することを特徴と
する。上記高倍率ズームレンズの光学系が、前玉フォー
カス方式であることを特徴とする。上記高倍率ズームレ
ンズの光学系が、２群インナーフォーカス方式であるこ
とを特徴とする。[0005] In an embodiment of the present invention, the rear lens group includes:
It comprises a first rear lens group and a first rear lens group, and the first rear lens group and the first rear lens group are displaced independently by the cooperation of the second variable power cam barrel and the second rectilinear barrel. And The optical system of the high-magnification zoom lens is of a front lens focus type. The optical system of the high-magnification zoom lens is of a two-group inner focus type.
【０００６】[0006]
【発明の効果】本発明によれば、全体をコンパクトにす
ることができ、しかも光軸を含む平面に対するカム溝の
傾き角度を大きくして、いずれの焦点距離においても小
さな操作力によってズーム操作を滑らかに行うことがで
き、さらに合理的な自動合焦機構を構成することができ
る、例えば２８ミリないし３００ミリという高倍率を可
能にする高倍率ズームレンズを構成することができる効
果を有する。According to the present invention, the whole can be made compact, the inclination angle of the cam groove with respect to the plane including the optical axis is increased, and the zoom operation can be performed with a small operation force at any focal length. This has the effect that a high-magnification zoom lens that can perform a high magnification of, for example, 28 mm to 300 mm can be formed smoothly and can form a reasonable automatic focusing mechanism.
【０００７】[0007]
【実施例】以下に、本発明の第１実施例を説明する。第
１実施例の高倍率ズームレンズ１の光学系は、第２レン
ズ群の移動によって合焦するインナーフォーカス式のも
のであって、図１及び図２に示すように、第１レンズ群
支持枠２１０に支持され正の屈折力を有する第１レンズ
群２１２、第２レンズ群支持枠２２０に支持され負の屈
折力の第２レンズ群２２２、第３レンズ群支持枠２３０
に支持され正の屈折力の第３レンズ群２３２、第４レン
ズ群支持枠２４０に支持され正又は負の屈折力の第４レ
ンズ群２４２からなる。各レンズ群は、図１０に移動軌
跡を示すように、ズーミングによってそれぞれ独立して
移動する。The first embodiment of the present invention will be described below. The optical system of the high-magnification zoom lens 1 according to the first embodiment is of an inner focus type that focuses on movement of the second lens group, and as shown in FIGS. 1 and 2, the first lens group support frame. A first lens group 212 having a positive refractive power and supported by 210, a second lens group 222 having a negative refractive power and a third lens group supporting frame 230 supported by a second lens group support frame 220.
And a fourth lens group 242 having a positive or negative refractive power and supported by a fourth lens group support frame 240. Each lens group moves independently by zooming, as shown in a movement locus in FIG.
【０００８】高倍率ズームレンズ１の機構は以下の通り
である。レンズマウント２によってカメラボデイ（図示
せず）に取り付けられるレンズ鏡筒４は、図１及び図２
に示すように、ズーム操作環１０、ズーム操作環１０の
前方に配置されたフォーカス操作環２０、ズーム操作環
１０の内側に配置された第１レンズ群移動枠３０、第１
レンズ群移動枠３０の内側に配置された第３変倍カム筒
４０、第３変倍カム筒４０の内側に配置された第１直進
筒５０、第１直進筒５０の内側に配置された第２レンズ
群移動筒６０、レンズマウント２と一体の固定筒７０、
固定筒７０の内側に配置された第１変倍カム筒８０、第
１変倍カム筒８０の内側に配置された第２変倍カム筒９
０、及び第２変倍カム筒９０の内側に配置された第２直
進筒１００が設けられている。The mechanism of the high-magnification zoom lens 1 is as follows. A lens barrel 4 attached to a camera body (not shown) by a lens mount 2 is shown in FIGS.
As shown in the figure, the zoom operation ring 10, the focus operation ring 20 arranged in front of the zoom operation ring 10, the first lens group moving frame 30 arranged inside the zoom operation ring 10, the first
A third variable power cam cylinder 40 disposed inside the lens unit moving frame 30, a first linear motion cylinder 50 disposed inside the third variable power cam cylinder 40, and a third linear motion cylinder disposed inside the first linear motion cylinder 50. A two-lens group moving barrel 60, a fixed barrel 70 integrated with the lens mount 2,
A first variable power cam cylinder 80 disposed inside the fixed cylinder 70, and a second variable power cam cylinder 9 disposed inside the first variable power cam cylinder 80
0 and a second rectilinear barrel 100 disposed inside the second variable power cam barrel 90.
【０００９】ズーム操作環１０は、第１連結ピン１２に
よって第１変倍カム筒８０に連結され、これを一体的に
回転させる。フォーカス操作環２０は、フォーカス連結
コマ６２（図６）を介して第２レンズ群移動筒６０に連
結され、第２レンズ群移動筒６０を回転させる。The zoom operation ring 10 is connected to the first variable power cam barrel 80 by a first connection pin 12 and rotates the same integrally. The focus operation ring 20 is connected to the second lens group moving barrel 60 via a focus connecting piece 62 (FIG. 6), and rotates the second lens group moving barrel 60.
【００１０】固定筒７０には、図３に示すように、第１
直進筒５０に設けられた第１直進筒コマ５３が係合する
第１直進筒直線溝７１、及び第２直進筒１００に設けら
れた第２直進筒コマ１０２が係合する第２直進筒直線溝
７３が設けられている。第１変倍カム筒８０には、図４
に示すように、第１直進筒コマ５３が係合する第１直進
筒コマ溝８１、第２直進筒コマ１０２が係合する第２直
進筒コマ溝８２、及び第２変倍カム筒９０の第２変倍カ
ム筒コマ９１が係合する第２変倍カム筒コマ溝８３が設
けられている。[0010] As shown in FIG.
A first straight cylinder straight groove 71 in which the first straight cylinder piece 53 provided in the straight cylinder 50 is engaged, and a second straight cylinder straight in which the second straight cylinder piece 102 provided in the second straight cylinder 100 is engaged. A groove 73 is provided. As shown in FIG.
As shown in the figure, the first straight barrel piece groove 81 with which the first straight barrel piece 53 engages, the second straight barrel piece groove 82 with which the second straight barrel piece 102 engages, and the second variable cam barrel 90 are formed. A second variable magnification cam cylinder frame groove 83 with which the second variable magnification cam cylinder frame 91 is engaged is provided.
【００１１】第２変倍カム筒９０には、図５に示すよう
に、第１変倍カム筒コマ９１及び第１変倍カム筒出力コ
マ９３が設けられ、さらに第３レンズ群支持枠２３０に
設けられた第３レンズ群コマ２３６が係合する第３レン
ズ群溝９２、及び第４レンズ群支持枠２４０に設けられ
た第４レンズ群コマ２４６が係合する第４レンズ群溝９
４が設けられている。As shown in FIG. 5, the second variable power cam barrel 90 is provided with a first variable power cam barrel piece 91 and a first variable power cam barrel output piece 93, and a third lens group support frame 230 is provided. The third lens group groove 92 in which the third lens group frame 236 provided in the third lens group is engaged, and the fourth lens group groove 9 in which the fourth lens group frame 246 provided in the fourth lens group support frame 240 is engaged.
4 are provided.
【００１２】第２直進筒１００には、図６に示すよう
に、固定筒７０に設けられた第２直進筒直線溝７３に係
合する第２直進筒コマ１０２が設けられ、さらに、第３
レンズ群支持枠２３０に設けられた第３レンズ群コマ２
３６が係合する第３レンズ群直線溝１０４、及び第４レ
ンズ群支持枠２４０に設けられた第４レンズ群コマ２４
６が係合する第４レンズ群直線溝１０６が設けられてい
る。As shown in FIG. 6, the second rectilinear barrel 100 is provided with a second rectilinear barrel piece 102 which engages with the second rectilinear barrel linear groove 73 provided on the fixed barrel 70.
Third lens group top 2 provided on lens group support frame 230
The third lens group linear groove 104 with which the second lens 36 engages, and the fourth lens group frame 24 provided in the fourth lens group support frame 240
A fourth lens group straight groove 106 with which the second lens 6 engages is provided.
【００１３】第２レンズ群移動筒６０は、図７に示すよ
うに、フォーカス操作環２０に設けられた前記フォーカ
ス連結コマ６２が係合するフォーカスコマ溝６３と、第
２レンズ群支持枠２２０に設けられた第１変倍カム筒コ
マ９１が係合する第２レンズ群溝６４が設けられてい
る。第１直進筒５０は、図８に示すように、第１直進筒
コマ５３、さらに、第１レンズ群移動枠２１０に設けら
れた第１レンズ群コマ２１６が係合する第１レンズ群直
線溝５１、及び第２レンズ群支持枠２２０に設けられた
第２レンズ群コマ２２６が係合する第１直進筒移動溝５
２が設けられている。第３変倍カム筒４０は、図９に示
すように、第１レンズ群移動枠２１０に設けられた第１
レンズ群コマ２１６が係合する第１レンズ群コマ溝４
１、及び第１変倍カム筒コマ９１が係合する第３倍率カ
ム筒直線溝４２が設けられている。As shown in FIG. 7, the second lens group moving barrel 60 is provided with a focus frame groove 63 provided on the focus operation ring 20 for engaging the focus connecting frame 62 and a second lens group support frame 220. A second lens group groove 64 with which the provided first variable power cam barrel piece 91 is engaged is provided. As shown in FIG. 8, the first rectilinear barrel 50 has a first rectilinear barrel piece 53 and a first lens group straight groove in which the first lens group piece 216 provided on the first lens group moving frame 210 is engaged. 51 and the first rectilinear cylinder moving groove 5 with which the second lens group piece 226 provided on the second lens group support frame 220 is engaged.
2 are provided. As shown in FIG. 9, the third variable magnification cam barrel 40 includes a first lens group moving frame 210
First lens group groove 4 with which lens group frame 216 engages
1 and a third magnification cam cylinder linear groove 42 with which the first variable magnification cam cylinder piece 91 is engaged.
【００１４】上述した高倍率ズームレンズ１の作動は以
下の通りである。フォーカス操作環２０を回転操作する
と、第１連結ピン１２を介して第１変倍カム筒８０が回
転させられる。第１変倍カム筒８０が回転すると、図４
及び図５に示すように、第１直進筒直線溝７１と第１直
進筒コマ溝８１との協働によって第１直進筒コマ５３そ
して第１直進筒５０が直進し、第１直進筒５０に支持さ
れた第３変倍カム筒４０も直進する。第１変倍カム筒８
０が回転するとさらに、第２直進筒直線溝７３と第２直
進筒コマ溝８２との協働によって第２直進筒コマ１０２
及び第２直進筒１００が直進し、第２直進筒１００に支
持された第２倍率カム筒９０も直進する。The operation of the high-magnification zoom lens 1 described above is as follows. When the focus operation ring 20 is rotated, the first zoom cam cylinder 80 is rotated via the first connection pin 12. When the first variable magnification cam cylinder 80 rotates, FIG.
As shown in FIG. 5, the first straight barrel piece 53 and the first straight barrel 50 advance straight by the cooperation of the first straight barrel straight groove 71 and the first straight barrel piece groove 81, and the first straight barrel 50 is moved to the first straight barrel 50. The supported third variable magnification cam cylinder 40 also moves straight. 1st variable magnification cam cylinder 8
When the rotation of the second straight cylinder piece 102 is further increased, the second straight cylinder piece 102 is further cooperated with the second straight cylinder piece groove 73 and the second straight cylinder piece groove 82.
And the second rectilinear barrel 100 moves straight, and the second magnification cam cylinder 90 supported by the second rectilinear barrel 100 also moves straight.
【００１５】第１変倍カム筒８０が回転するとさらにま
た、第２変倍カム筒コマ溝８３によって第２変倍カム筒
コマ９１そして第２変倍カム筒９０が回転させられる。When the first variable power cam cylinder 80 rotates, the second variable power cam cylinder piece 91 and the second variable power cam cylinder 90 are further rotated by the second variable power cam cylinder frame groove 83.
【００１６】第２変倍カム筒９０の回転は、図５及び図
６から理解できるように、第３レンズ溝９４と第３レン
ズ群直線溝１０４の協働によって第３レンズ群コマ２３
６及び第３レンズ群支持枠２３０を直進させる。第２変
倍カム筒９０の回転はまた、図５及び図６から理解でき
るように、第４レンズ溝９６と第３レンズ群直線溝１０
６の協働によって第４レンズ群コマ２４６及び第３レン
ズ群支持枠２４０を直進させる。第２変倍カム筒９０の
回転はさらに、第２変倍カム筒出力コマ９３を回転・直
進させる。第２変倍カム筒出力コマ９３の回転・直進
は、第３変倍カム筒直進溝４２によって第３変倍カム筒
４０を回転させ、第１直進筒移動溝５２によって第１直
進筒５０を直進させ、さらに第２レンズ群溝６４によっ
て第２レンズ群移動筒６０を直進させる。As can be understood from FIGS. 5 and 6, the rotation of the second variable magnification cam barrel 90 is performed by the cooperation of the third lens groove 94 and the third lens group straight groove 104.
The sixth and third lens group support frames 230 are moved straight. As can be understood from FIGS. 5 and 6, the rotation of the second variable magnification cam barrel 90 also includes the fourth lens groove 96 and the third lens group straight groove 10.
The fourth lens group frame 246 and the third lens group support frame 240 are moved straight by the cooperation of step 6. The rotation of the second zoom cam cylinder 90 further rotates and straightly moves the second zoom cam cylinder output frame 93. The rotation / straight movement of the second variable-magnification cam cylinder output frame 93 is performed by rotating the third variable-magnification cam cylinder 40 by the third variable-magnification cam cylinder rectilinear groove 42, and by rotating the first linear-movement cylinder 50 by the first rectilinear cylinder movement groove 52. Then, the second lens group moving cylinder 60 is moved straight by the second lens group groove 64.
【００１７】第２変倍カム筒出力コマ９３の回転による
第３変倍カム筒４０の回転は、第１レンズ群コマ溝４１
と第１レンズ群直線溝５１の協働によって第１レンズ群
コマ２１６及び第１レンズ群支持枠２１０を第１直進筒
５０に対し直進させる。第２レンズ群移動筒６０の回転
はフォーカス連結コマ６２によって規制されており、第
２レンズ群移動筒６０とフォーカス連結コマ６２との位
置関係は、フォーカス溝６３の形状によって決定され
る。第２変倍カム筒出力コマ９３の回転は、第２レンズ
群溝６４によって第２レンズ群移動筒６０及びこれに連
結された第２レンズ群支持枠２２０を直進させる。The rotation of the third variable magnification cam barrel 40 due to the rotation of the second variable magnification cam cylinder output frame 93 is performed by the first lens group frame 41.
The first lens group frame 216 and the first lens group support frame 210 are caused to move straight with respect to the first rectilinear barrel 50 by cooperation of the first lens group straight groove 51 and the first lens group straight groove 51. The rotation of the second lens group moving barrel 60 is regulated by the focus connecting piece 62, and the positional relationship between the second lens group moving barrel 60 and the focus connecting piece 62 is determined by the shape of the focus groove 63. The rotation of the second variable magnification cam cylinder output frame 93 causes the second lens group moving cylinder 60 and the second lens group support frame 220 connected thereto to move straight through the second lens group groove 64.
【００１８】フォーカス操作環２０を回転させると、フ
ォーカス連結コマ６２（図７）を介して第２レンズ群移
動筒６０が回転される。第２変倍カム筒出力コマ９３の
回転は、第２変倍カム筒出力コマ９３と第２レンズ群溝
６４の協働によって第２レンズ群移動筒６０及びこれに
連結された第２レンズ群支持枠２２０を前進させる。When the focus operation ring 20 is rotated, the second lens group moving barrel 60 is rotated via the focus connection piece 62 (FIG. 7). The rotation of the second variable magnification cam barrel output frame 93 is performed by the cooperation of the second variable magnification cam cylinder output frame 93 and the second lens group groove 64, and the second lens group moving cylinder 60 and the second lens group connected thereto. The support frame 220 is advanced.
【００１９】第２実施例の高倍率ズームレンズは、第１
レンズ群の移動によって合焦するアウターフォーカス式
のものであって、第１実施例の高倍率ズームレンズの第
１変倍カム筒出力コマ９３に第２レンズ群を直接連結
し、第２レンズ群移動筒６０及びフォーカス連結コマ６
２を排除する。第１レンズ群を支持する第１レンズ群移
動枠は、第３変倍カム筒とヘリコイド係合され、フォー
カス操作環によって第１レンズ群移動枠を回転させるよ
うに構成する。The high-magnification zoom lens according to the second embodiment includes the first zoom lens.
An outer focus type that focuses on movement of a lens group, the second lens group is directly connected to the first variable magnification cam barrel output frame 93 of the high-magnification zoom lens of the first embodiment, and the second lens group Moving barrel 60 and focus connection piece 6
Eliminate 2. The first lens group moving frame that supports the first lens group is helicoidally engaged with the third variable power cam barrel, and is configured to rotate the first lens group moving frame by a focus operation ring.
【図１】本発明の第１実施例の高倍率ズームレンズの広
角状態の断面図である。FIG. 1 is a sectional view of a high-magnification zoom lens according to a first embodiment of the present invention in a wide-angle state.
【図２】本発明の第１実施例の高倍率ズームレンズの望
遠状態の断面図である。FIG. 2 is a sectional view of the high-magnification zoom lens according to the first embodiment of the present invention in a telephoto state.
【図３】本発明の第１実施例の固定筒の展開図である。FIG. 3 is a development view of the fixed cylinder according to the first embodiment of the present invention.
【図４】本発明の第１実施例の第１変倍カム筒の展開図
である。FIG. 4 is a development view of a first variable magnification cam cylinder according to the first embodiment of the present invention.
【図５】本発明の第１実施例の第２変倍カム筒の展開図
である。FIG. 5 is an expanded view of a second variable magnification cam barrel according to the first embodiment of the present invention.
【図６】本発明の第１実施例の第２直進筒の展開図であ
る。FIG. 6 is a development view of a second rectilinear cylinder according to the first embodiment of the present invention.
【図７】本発明の第１実施例の第２レンズ群移動筒の展
開図である。FIG. 7 is a development view of a second lens group moving cylinder according to the first embodiment of the present invention.
【図８】本発明の第１実施例の第１直進筒の展開図であ
る。FIG. 8 is a development view of a first rectilinear cylinder according to the first embodiment of the present invention.
【図９】本発明の第１実施例の第３変倍カム筒の展開図
である。FIG. 9 is a developed view of a third variable magnification cam cylinder according to the first embodiment of the present invention.
【図１０】本発明の第１実施例の高倍率ズームレンズの
光学系のレンズ群の移動軌跡を示すグラフ図である。FIG. 10 is a graph showing a movement locus of a lens group of the optical system of the high-magnification zoom lens according to the first embodiment of the present invention.
１ 高倍率ズームレンズ ２ レンズマウント １０ ズーム操作環 ２０ フォーカス操作環 ３０ 第１レンズ群移動枠 ４０ 第３変倍カム筒 ４１ 第１レンズ群コマ溝 ４２ 第３倍率カム筒直線溝 ５０ 第１直進筒 ５１ 第１レンズ群直線溝 ５２ 第１直進筒移動溝 ５３ 第１直進筒コマ ６０ 第２レンズ群移動筒 ６２ フォーカス連結コマ ６４ 第２レンズ群溝 ７０ 第１直進筒 ７１ 第１直進筒直線溝 ７３ 第２直進筒直線溝 ８０ 第１変倍カム筒 ８１ 第１直進筒コマ溝 ８２ 第２直進筒コマ溝 ８３ 第２変倍カム筒コマ溝 ９０ 第２変倍カム筒 ９３ 第１変倍カム筒出力コマ ９４ 第３レンズ群溝 ９６ 第４レンズ群溝 １００ 第２直進筒 １０２ 第２直進筒コマ １０４ 第３レンズ群直線溝 １０６ 第４レンズ群直線溝 ２１０ 第１レンズ群支持枠 ２１２ 第１レンズ群 ２２０ 第２レンズ群支持枠 ２２２ 第２レンズ群 ２３０ 第３レンズ群支持枠 ２３２ 第３レンズ群 ２４０ 第４レンズ群支持枠 ２４２ 第４レンズ群 DESCRIPTION OF SYMBOLS 1 High magnification zoom lens 2 Lens mount 10 Zoom operation ring 20 Focus operation ring 30 1st lens group moving frame 40 3rd variable power cam cylinder 41 1st lens group coma groove 42 3rd magnification cam cylinder linear groove 50 1st linear cylinder 51 First lens group linear groove 52 First straight cylinder moving groove 53 First straight cylinder barrel 60 Second lens group moving barrel 62 Focus connection piece 64 Second lens group groove 70 First straight cylinder 71 First straight cylinder linear groove 73 Second straight cylinder straight groove 80 First variable cam cylinder 81 First straight cylinder frame groove 82 Second straight cylinder frame groove 83 Second variable cam cylinder frame 90 Second variable cam cylinder 93 First variable cam cylinder Output frame 94 Third lens group groove 96 Fourth lens group groove 100 Second rectilinear barrel 102 Second rectilinear barrel coma 104 Third lens group straight groove 106 Fourth lens group straight groove 210 First lens group support frame 212 First lens group 220 and the second lens group support frame 222 the second lens group 230 third lens group support frame 232 third lens group 240 fourth lens group support frame 242 fourth lens group
Claims (5)
たことを特徴とする高倍率ズームレンズ。1. A high-magnification zoom lens comprising a straight barrel disposed inside and outside a fixed barrel.
２変倍カム筒、及び第２直進筒を配置し、 固定筒の外側に順次フォーカスレンズ群移動筒、第１直
進筒、及び第３変倍カム筒を配置し、 上記第２変倍カム筒に、フォーカスレンズ群移動筒、第
１直進筒、及び第３変倍カム筒に係合する第２変倍カム
筒出力コマを設け、 ズーム操作環を回転させることによって、第１変倍カム
筒を回転させ、これによって第２変倍カム筒を直進回転
させ、後レンズ群を変位させ、 第２変倍カム筒の直進回転を第２変倍カム筒出力コマを
介して伝達させ、前レンズ群移動筒及び前レンズ群を直
進させ、第１直進筒を直進させ、第３変倍カムを回転さ
せ、 第３変倍カムの回転によって前レンズ群を変位させ、フ
ォーカス操作環の回転によってフォーカスレンズ群を変
位させることを特徴とする高倍率ズームレンズ。2. A first variable magnification cam cylinder, a second variable magnification cam cylinder, and a second rectilinear cylinder are sequentially disposed inside a fixed cylinder, and a focus lens group moving cylinder and a first rectilinear cylinder are sequentially disposed outside the fixed cylinder. And a third variable power cam cylinder, and a second variable power cam cylinder output engaged with the focus lens group moving cylinder, the first rectilinear motion cylinder, and the third variable power cam cylinder on the second variable power cam cylinder. By providing a coma and rotating the zoom operation ring, the first variable magnification cam cylinder is rotated, whereby the second variable magnification cam cylinder is caused to rotate linearly, and the rear lens group is displaced. The straight rotation is transmitted through the second variable magnification cam barrel output frame, the front lens group moving barrel and the front lens group are moved straight, the first straight barrel is moved straight, and the third magnification cam is rotated. The front lens group is displaced by the rotation of the double cam, and the focus lens is rotated by the rotation of the focus operation ring. High power zoom lens, characterized in that to displace the group.
第１後レンズ群からなり、第１後レンズ群及び第１後レ
ンズ群が上記第２変倍カム筒及び第２直進筒の協働によ
って独立して変位することを特徴とする請求項２に記載
の高倍率ズームレンズ。3. The rear lens group includes a first rear lens group and a first rear lens group, and the first rear lens group and the first rear lens group are formed of the second variable power cam barrel and the second rectilinear cylinder. The high-power zoom lens according to claim 2, wherein the zoom lens is independently displaced by cooperation.
玉フォーカス方式であることを特徴とする請求項１に記
載の高倍率ズームレンズ。4. The high-magnification zoom lens according to claim 1, wherein the optical system of the high-magnification zoom lens is a front lens focus system.
群インナーフォーカス方式であることを特徴とする請求
項１に記載の高倍率ズームレンズ。5. An optical system of the high-magnification zoom lens, comprising:
2. The high magnification zoom lens according to claim 1, wherein the zoom lens is a group inner focus type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06039697A JP3854681B2 (en) | 1997-03-14 | 1997-03-14 | High magnification zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06039697A JP3854681B2 (en) | 1997-03-14 | 1997-03-14 | High magnification zoom lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10253867A true JPH10253867A (en) | 1998-09-25 |
| JP3854681B2 JP3854681B2 (en) | 2006-12-06 |
Family
ID=13140965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06039697A Expired - Lifetime JP3854681B2 (en) | 1997-03-14 | 1997-03-14 | High magnification zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3854681B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010049082A (en) * | 2008-08-22 | 2010-03-04 | Nikon Corp | Lens barrel and imaging device |
| CN103207438A (en) * | 2012-01-13 | 2013-07-17 | 株式会社腾龙 | Zoom lens barrel |
| US11022775B2 (en) | 2018-01-30 | 2021-06-01 | Canon Kabushiki Kaisha | Lens apparatus and optical apparatus |
-
1997
- 1997-03-14 JP JP06039697A patent/JP3854681B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010049082A (en) * | 2008-08-22 | 2010-03-04 | Nikon Corp | Lens barrel and imaging device |
| CN103207438A (en) * | 2012-01-13 | 2013-07-17 | 株式会社腾龙 | Zoom lens barrel |
| US11022775B2 (en) | 2018-01-30 | 2021-06-01 | Canon Kabushiki Kaisha | Lens apparatus and optical apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3854681B2 (en) | 2006-12-06 |
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