JPS623928B2 - - Google Patents

Info

Publication number
JPS623928B2
JPS623928B2 JP55122859A JP12285980A JPS623928B2 JP S623928 B2 JPS623928 B2 JP S623928B2 JP 55122859 A JP55122859 A JP 55122859A JP 12285980 A JP12285980 A JP 12285980A JP S623928 B2 JPS623928 B2 JP S623928B2
Authority
JP
Japan
Prior art keywords
lens
lens group
positive
object side
negative
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
JP55122859A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5746222A (en
Inventor
Masatake Kato
Shigeru Hashimoto
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
Priority to JP55122859A priority Critical patent/JPS5746222A/ja
Priority to US06/298,335 priority patent/US4464023A/en
Publication of JPS5746222A publication Critical patent/JPS5746222A/ja
Publication of JPS623928B2 publication Critical patent/JPS623928B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/62—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having six components 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
    • G02B15/143—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 three groups only
    • G02B15/1431—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 three groups only the first group being positive
    • G02B15/143103—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 three groups only the first group being positive arranged ++-

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
JP55122859A 1980-09-04 1980-09-04 Large aperture ratio objective lens Granted JPS5746222A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55122859A JPS5746222A (en) 1980-09-04 1980-09-04 Large aperture ratio objective lens
US06/298,335 US4464023A (en) 1980-09-04 1981-08-31 Large relative aperture objective

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55122859A JPS5746222A (en) 1980-09-04 1980-09-04 Large aperture ratio objective lens

Publications (2)

Publication Number Publication Date
JPS5746222A JPS5746222A (en) 1982-03-16
JPS623928B2 true JPS623928B2 (en, 2012) 1987-01-28

Family

ID=14846399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55122859A Granted JPS5746222A (en) 1980-09-04 1980-09-04 Large aperture ratio objective lens

Country Status (2)

Country Link
US (1) US4464023A (en, 2012)
JP (1) JPS5746222A (en, 2012)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57111506A (en) * 1980-12-27 1982-07-12 Olympus Optical Co Ltd Lens system having short distance correcting function
JPH07101253B2 (ja) * 1987-04-03 1995-11-01 キヤノン株式会社 フロ−テイングを利用した撮影レンズ
JP2697119B2 (ja) * 1989-04-26 1998-01-14 株式会社ニコン 近距離撮影可能なレンズ系
US5592335A (en) * 1993-03-23 1997-01-07 Nikon Corporation Reduced diameter camera lens barrel with lens shift device and improved focus lens drive linkage
US5835286A (en) * 1995-08-25 1998-11-10 Olympus Optical Co., Ltd. Standard lens system having a large aperture ratio
US5825556A (en) * 1996-09-30 1998-10-20 Eastman Kodak Company Zoom lens
JP5445090B2 (ja) * 2009-12-10 2014-03-19 株式会社リコー 読取レンズ、画像読取装置および画像形成装置
CN106662728B (zh) * 2014-09-10 2019-09-06 大族激光科技产业集团股份有限公司 摄影物镜
JP6530531B1 (ja) * 2018-01-23 2019-06-12 エーエーシー テクノロジーズ ピーティーイー リミテッド 撮像光学レンズ
CN109239894B (zh) * 2018-11-28 2024-04-23 浙江舜宇光学有限公司 光学成像系统

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5237445A (en) * 1975-09-20 1977-03-23 Minolta Camera Co Ltd Lens system rendering variable characteristics of an image plane

Also Published As

Publication number Publication date
US4464023A (en) 1984-08-07
JPS5746222A (en) 1982-03-16

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