GB1418731A - Zoom lens systems - Google Patents

Zoom lens systems

Info

Publication number
GB1418731A
GB1418731A GB437673A GB437673A GB1418731A GB 1418731 A GB1418731 A GB 1418731A GB 437673 A GB437673 A GB 437673A GB 437673 A GB437673 A GB 437673A GB 1418731 A GB1418731 A GB 1418731A
Authority
GB
United Kingdom
Prior art keywords
zoom lens
lens systems
systems
zoom
lens
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
Application number
GB437673A
Other languages
English (en)
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Publication of GB1418731A publication Critical patent/GB1418731A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
    • G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
    • G02B15/173—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 +-+
    • 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
    • G02B15/144105—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 +-+-
    • 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 +-++
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lenses (AREA)
GB437673A 1972-02-01 1973-01-29 Zoom lens systems Expired GB1418731A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47011707A JPS5112424B2 (enrdf_load_stackoverflow) 1972-02-01 1972-02-01

Publications (1)

Publication Number Publication Date
GB1418731A true GB1418731A (en) 1975-12-24

Family

ID=11785503

Family Applications (1)

Application Number Title Priority Date Filing Date
GB437673A Expired GB1418731A (en) 1972-02-01 1973-01-29 Zoom lens systems

Country Status (4)

Country Link
JP (1) JPS5112424B2 (enrdf_load_stackoverflow)
DE (1) DE2304737C2 (enrdf_load_stackoverflow)
FR (1) FR2170086B1 (enrdf_load_stackoverflow)
GB (1) GB1418731A (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51144652A (en) * 1975-06-06 1976-12-11 Canon Inc Built-in multiplying factor altering optical system
JPS52120850A (en) * 1976-04-02 1977-10-11 Elmo Co Ltd Zoom lens having high zoom ratio and large relative aperture
JPS5919590Y2 (ja) * 1978-06-06 1984-06-06 日「鉄」溶接工業株式会社 被覆ア−ク溶接棒の移送区分装置
JP4517422B2 (ja) * 1999-11-24 2010-08-04 株式会社ニコン アフォーカルズームレンズ及び該レンズを備える顕微鏡
JP5603301B2 (ja) * 2011-07-19 2014-10-08 富士フイルム株式会社 投写用変倍光学系および投写型表示装置
DE102018204155B4 (de) 2018-03-19 2020-01-23 Carl Zeiss Ag Objektiv mit veränderlicher Brennweite und Verfahren zur Steuerung des Objektivs sowie Fernrohr und Fernglas mit einem solchen Objektiv

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3547523A (en) * 1967-07-13 1970-12-15 Konishiroku Photo Ind Zoom objective lens system with highly reduced secondary chromatic aberration

Also Published As

Publication number Publication date
DE2304737C2 (de) 1982-08-26
FR2170086A1 (enrdf_load_stackoverflow) 1973-09-14
DE2304737A1 (de) 1973-08-16
JPS4881545A (enrdf_load_stackoverflow) 1973-10-31
JPS5112424B2 (enrdf_load_stackoverflow) 1976-04-19
FR2170086B1 (enrdf_load_stackoverflow) 1975-10-31

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930127