CA2212687C - Zoom lens system having high zoom ratio - Google Patents

Zoom lens system having high zoom ratio Download PDF

Info

Publication number
CA2212687C
CA2212687C CA002212687A CA2212687A CA2212687C CA 2212687 C CA2212687 C CA 2212687C CA 002212687 A CA002212687 A CA 002212687A CA 2212687 A CA2212687 A CA 2212687A CA 2212687 C CA2212687 C CA 2212687C
Authority
CA
Canada
Prior art keywords
lens
lens group
focal length
zoom
lens system
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 - Fee Related
Application number
CA002212687A
Other languages
English (en)
French (fr)
Other versions
CA2212687A1 (en
Inventor
Takashi Enomoto
Takayuki Ito
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of CA2212687A1 publication Critical patent/CA2212687A1/en
Application granted granted Critical
Publication of CA2212687C publication Critical patent/CA2212687C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G02B15/17—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)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
CA002212687A 1996-08-12 1997-08-08 Zoom lens system having high zoom ratio Expired - Fee Related CA2212687C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8-212652 1996-08-12
JP21265296A JP3723643B2 (ja) 1996-08-12 1996-08-12 高変倍ズームレンズ系

Publications (2)

Publication Number Publication Date
CA2212687A1 CA2212687A1 (en) 1998-02-12
CA2212687C true CA2212687C (en) 2001-10-02

Family

ID=16626178

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002212687A Expired - Fee Related CA2212687C (en) 1996-08-12 1997-08-08 Zoom lens system having high zoom ratio

Country Status (5)

Country Link
US (1) US5815322A (enExample)
JP (1) JP3723643B2 (enExample)
CA (1) CA2212687C (enExample)
DE (1) DE19734921B4 (enExample)
GB (1) GB2316500B (enExample)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103336354B (zh) * 2013-07-03 2015-06-17 福建福光数码科技有限公司 小型化、强光力、大倍比手动三可变摄像镜头
JP6283986B2 (ja) * 2013-08-30 2018-02-28 株式会社リコー ズームレンズ、撮像装置および監視用ビデオカメラ
JP6270104B2 (ja) * 2013-08-28 2018-01-31 株式会社リコー ズームレンズ、撮像装置および監視用ビデオカメラ
US9459434B2 (en) 2013-08-28 2016-10-04 Ricoh Company, Ltd. Zoom lens and imaging apparatus
JP6252103B2 (ja) * 2013-10-25 2017-12-27 株式会社リコー ズームレンズ及びこのズームレンズを用いた撮像装置
JP6307834B2 (ja) * 2013-10-25 2018-04-11 株式会社リコー ズームレンズ及びこのズームレンズを用いた撮像装置
US9470881B2 (en) 2013-10-25 2016-10-18 Ricoh Company, Ltd. Zoom lens and imaging device using zoom lens
JP6354196B2 (ja) * 2014-02-19 2018-07-11 株式会社リコー ズームレンズおよびこのズームレンズを用いた撮像装置
JP6308425B2 (ja) 2014-03-12 2018-04-11 株式会社リコー ズームレンズおよびカメラ
CN105676434B (zh) * 2016-04-27 2018-08-21 佛山华国光学器材有限公司 一种透雾60x大变倍光学系统

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL90813C (enExample) * 1950-07-18
GB941754A (en) * 1961-12-20 1963-11-13 Isco Optische Werke Gmbh Optical objectives
GB1064323A (en) * 1962-09-14 1967-04-05 Rank Precision Ind Ltd Improvements in or relating to optical objectives of variable equivalent focal length
GB1066501A (en) * 1962-10-04 1967-04-26 Rank Precision Ind Ltd Improvements in or relating to optical objectives of variable equivalent focal length
GB1109913A (en) * 1965-07-26 1968-04-18 Rank Organisation Ltd Improvements in or relating to optical objectives of variable equivalent focal length
DE1497590C3 (de) * 1966-04-05 1974-10-17 Jos. Schneider & Co, Optische Werke, 6550 Bad Kreuznach Lichtstarkes Objektiv mit veränderbarer Brennweite
GB1190873A (en) * 1967-06-30 1970-05-06 Schneider Co Optische Werke Improvements relating to Zoom Lenses
DE2032573A1 (de) * 1970-07-01 1972-01-05 Jos. Schneider & Co, Optische Werke, 6550 Bad Kreuznach Lichtstarkes Objektiv mit veränderbarer Brennweite
DE2164937A1 (de) * 1971-12-28 1973-07-05 Schneider Co Optische Werke Lichtstarkes objektiv mit veraenderbarer brennweite
DD106718A5 (enExample) * 1972-09-14 1974-06-20
JPS53979Y2 (enExample) * 1973-04-13 1978-01-12
JPS512439A (en) * 1974-06-17 1976-01-10 Canon Kk Makurozuumurenzukei
US4080047A (en) * 1975-04-03 1978-03-21 Minolta Camera Kabushiki Kaisha Lens system capable of wide range zooming and macrophotography
JPS57135912A (en) * 1981-02-16 1982-08-21 Asahi Optical Co Ltd Zoom lens
JPS58108511A (ja) * 1981-12-22 1983-06-28 Asahi Optical Co Ltd ビデオカメラ用ズ−ムレンズ
US5221995A (en) * 1989-08-12 1993-06-22 Asahi Kogaku Kogyo K.K. Zoom lens system
US5189557A (en) * 1990-11-20 1993-02-23 Canon Kabushiki Kaisha High variable magnification range zoom lens
JP3174357B2 (ja) * 1991-08-23 2001-06-11 旭光学工業株式会社 ズームレンズ
JP3167069B2 (ja) * 1993-11-30 2001-05-14 キヤノン株式会社 ズームレンズ

Also Published As

Publication number Publication date
GB2316500B (en) 2000-10-11
JPH1054937A (ja) 1998-02-24
DE19734921B4 (de) 2006-07-13
CA2212687A1 (en) 1998-02-12
GB2316500A (en) 1998-02-25
GB9717137D0 (en) 1997-10-22
JP3723643B2 (ja) 2005-12-07
DE19734921A1 (de) 1998-02-19
US5815322A (en) 1998-09-29

Similar Documents

Publication Publication Date Title
JP4051731B2 (ja) 高倍率ズームレンズ
US20080100924A1 (en) High zoom ratio zoom lens system
US6833964B2 (en) Zoom lens system
US6631034B2 (en) Zoom lens system
JP7167000B2 (ja) ズームレンズおよび撮像装置
US7209299B2 (en) Vibration reduction zoom lens system
US20070070518A1 (en) Zoom lens system
JP6493896B2 (ja) ズームレンズおよび撮像装置
JP6685950B2 (ja) ズームレンズおよび撮像装置
JPH04260016A (ja) コンパクトな３群ズームレンズ
CA2212687C (en) Zoom lens system having high zoom ratio
JP6411678B2 (ja) ズームレンズおよび撮像装置
JP6711666B2 (ja) ズームレンズ及びそれを有する撮像装置
JP3698134B2 (ja) ズームレンズ
US5270865A (en) Compact zoom lens
US6236518B1 (en) Zoom lens system
JP3383061B2 (ja) ズームレンズ及びズームレンズを備えたカメラ
WO2021085142A1 (ja) 変倍光学系および撮像装置
US20060056053A1 (en) Zoom lens system
JP2722709B2 (ja) ズームレンズ
JPH08227038A (ja) ズームレンズ系
JP3134448B2 (ja) 望遠ズームレンズ
JP3618557B2 (ja) ズ―ムレンズ
JP2007093984A (ja) ズームレンズ
JPH10133111A (ja) 内焦式ズームレンズ

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20100809