JPS6435515A - Zoom lens - Google Patents

Zoom lens

Info

Publication number
JPS6435515A
JPS6435515A JP62192380A JP19238087A JPS6435515A JP S6435515 A JPS6435515 A JP S6435515A JP 62192380 A JP62192380 A JP 62192380A JP 19238087 A JP19238087 A JP 19238087A JP S6435515 A JPS6435515 A JP S6435515A
Authority
JP
Japan
Prior art keywords
time
distance
image
value
lens group
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.)
Pending
Application number
JP62192380A
Other languages
Japanese (ja)
Inventor
Tetsuo Ishizuka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP62192380A priority Critical patent/JPS6435515A/en
Publication of JPS6435515A publication Critical patent/JPS6435515A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
    • 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
    • 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
    • G02B15/145—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 five groups only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
    • G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
    • G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lens Barrels (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To execute focusing by only a rotational operation of a range ring, by constituting the titled zoom lens so that a focusing lens group can be controlled independently by a zooming mechanism and a distance adjusting mechanics, on one cam curve. CONSTITUTION:A focusing lens group is controlled independently by a zooming mechanism and a distance adjusting mechanism and moves on one cam curve. That is, this zoom lens is constituted so that when a position on an optical axis of a focusing lens group, the rotation quantity of a zooming mechanism, a function for showing a cam curve of the focusing lens group, a distance between an object and an image, a first distance between an object and an image, a second distance between an object and a image, a value of other arbitrary R than Ra and Rb, the rotation quantity of a distance adjusting mechanism, a value of C at the time of R=Ra, a value of C at the time of R=Rb, and a value of C at the time of R=Ri are denoted as (y), (x), (g), R, Ra, Rb, Ri, C, Ca, Cb and Ci, respectively, it is focused by y=g(x+Ca) at the time of R=Ra, focused by y=g(x+Cb) at the time of R=Rb, and an image is formed within the depth of focus by y=g(x+Ci) at the time of R=Ri. In such a way, focusing can easily be executed.
JP62192380A 1987-07-31 1987-07-31 Zoom lens Pending JPS6435515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62192380A JPS6435515A (en) 1987-07-31 1987-07-31 Zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62192380A JPS6435515A (en) 1987-07-31 1987-07-31 Zoom lens

Publications (1)

Publication Number Publication Date
JPS6435515A true JPS6435515A (en) 1989-02-06

Family

ID=16290333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62192380A Pending JPS6435515A (en) 1987-07-31 1987-07-31 Zoom lens

Country Status (1)

Country Link
JP (1) JPS6435515A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5337187A (en) * 1991-11-20 1994-08-09 Nikon Corporation Zoom lens system
JP2014215586A (en) * 2013-04-30 2014-11-17 キヤノン株式会社 Zoom lens and imaging apparatus including the same
CN114265189A (en) * 2021-11-23 2022-04-01 中山联合光电研究院有限公司 Zoom lens and imaging device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5337187A (en) * 1991-11-20 1994-08-09 Nikon Corporation Zoom lens system
JP2014215586A (en) * 2013-04-30 2014-11-17 キヤノン株式会社 Zoom lens and imaging apparatus including the same
CN114265189A (en) * 2021-11-23 2022-04-01 中山联合光电研究院有限公司 Zoom lens and imaging device

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