FR2745643B1 - Systeme de lentilles a focale variable grand angle - Google Patents

Systeme de lentilles a focale variable grand angle

Info

Publication number
FR2745643B1
FR2745643B1 FR9702509A FR9702509A FR2745643B1 FR 2745643 B1 FR2745643 B1 FR 2745643B1 FR 9702509 A FR9702509 A FR 9702509A FR 9702509 A FR9702509 A FR 9702509A FR 2745643 B1 FR2745643 B1 FR 2745643B1
Authority
FR
France
Prior art keywords
lens system
wide angle
variable focal
angle variable
focal 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 - Fee Related
Application number
FR9702509A
Other languages
English (en)
Other versions
FR2745643A1 (fr
Inventor
Chikara Yamamoto
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.)
Fujinon Corp
Original Assignee
Fuji Photo Optical 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 Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Publication of FR2745643A1 publication Critical patent/FR2745643A1/fr
Application granted granted Critical
Publication of FR2745643B1 publication Critical patent/FR2745643B1/fr
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
    • G02B15/177—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 negative front lens or group of lenses
    • 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
    • G02B15/1445—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 negative
    • G02B15/144511—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 negative arranged -+-+

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lenses (AREA)
FR9702509A 1996-03-04 1997-03-03 Systeme de lentilles a focale variable grand angle Expired - Fee Related FR2745643B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP07515896A JP3310854B2 (ja) 1996-03-04 1996-03-04 ワイドズームレンズ
DE19717120A DE19717120A1 (de) 1996-03-04 1997-04-23 Zoom-Objektiv mit weitem Bereich

Publications (2)

Publication Number Publication Date
FR2745643A1 FR2745643A1 (fr) 1997-09-05
FR2745643B1 true FR2745643B1 (fr) 1999-04-16

Family

ID=26036029

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9702509A Expired - Fee Related FR2745643B1 (fr) 1996-03-04 1997-03-03 Systeme de lentilles a focale variable grand angle

Country Status (4)

Country Link
US (1) US5805350A (fr)
JP (1) JP3310854B2 (fr)
DE (2) DE19708523C2 (fr)
FR (1) FR2745643B1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10268193A (ja) * 1997-03-24 1998-10-09 Fuji Photo Optical Co Ltd ズームレンズ
JPH10333034A (ja) 1997-06-03 1998-12-18 Olympus Optical Co Ltd 光学系
US6191896B1 (en) * 1997-09-04 2001-02-20 Canon Kabushiki Kaisha Zoom lens and optical apparatus having the same
JPH1195098A (ja) * 1997-09-16 1999-04-09 Nitto Kogaku Kk 投写用ズームレンズおよびプロジェクタ装置
US5963377A (en) * 1997-10-02 1999-10-05 Minolta Co., Ltd. Taking optical system for video shooting
JP4392901B2 (ja) * 1999-05-26 2010-01-06 キヤノン株式会社 ズームレンズ
US6137638A (en) * 1999-07-28 2000-10-24 Nittoh Kogaku K.K. Projection zoom lens system and projector apparatus
US6545819B1 (en) * 1999-08-31 2003-04-08 Canon Kabushiki Kaisha Zoom lens and optical apparatus having the same
JP3847506B2 (ja) * 1999-12-21 2006-11-22 オリンパス株式会社 ズームレンズ
JP3503631B2 (ja) 2001-04-27 2004-03-08 セイコーエプソン株式会社 投映用ズームレンズ及びこれを備えたプロジェクター
JP4048904B2 (ja) * 2002-10-08 2008-02-20 ソニー株式会社 撮像レンズ
JP2005055496A (ja) * 2003-08-05 2005-03-03 Olympus Corp 変倍光学系
JP4792779B2 (ja) 2005-03-29 2011-10-12 株式会社ニコン ズームレンズ
GB2431247B (en) * 2005-10-14 2007-11-07 Foxlink Image Tech Co Ltd Zoom lens system
JP2007271697A (ja) * 2006-03-30 2007-10-18 Fujinon Corp 投影用ズームレンズおよび投写型表示装置
JP5415036B2 (ja) * 2008-07-24 2014-02-12 富士フイルム株式会社 投写型可変焦点レンズおよび投写型表示装置
JP5244498B2 (ja) * 2008-08-14 2013-07-24 富士フイルム株式会社 投写型可変焦点レンズおよび投写型表示装置
TW201037352A (en) * 2009-04-10 2010-10-16 Young Optics Inc Fixed-focus lens
TWI530710B (zh) 2015-04-24 2016-04-21 中強光電股份有限公司 投影裝置以及投影鏡頭
CN110716298A (zh) * 2019-10-29 2020-01-21 福建福光天瞳光学有限公司 1.1英寸大靶面16mm焦距高清低畸变工业用镜头及其制造方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH607069A5 (fr) * 1975-09-29 1978-11-30 Bertele Ludwig
AT348790B (de) * 1977-10-28 1979-03-12 Eumig Pankratisches objektiv
JPS5895315A (ja) * 1981-11-30 1983-06-06 Minolta Camera Co Ltd 広角域を含む高変倍率ズ−ムレンズ系
JPS6087312A (ja) * 1983-10-20 1985-05-17 Ricoh Co Ltd 超広角高変倍ズ−ムレンズ
US5329401A (en) * 1991-01-11 1994-07-12 Nikon Corporation Super wide angle zoom lens
JP2516522B2 (ja) * 1992-04-21 1996-07-24 株式会社エルモ社 ワイドズ―ムレンズ

Also Published As

Publication number Publication date
DE19708523C2 (de) 2002-11-28
JP3310854B2 (ja) 2002-08-05
DE19717120A1 (de) 1998-10-29
DE19708523A1 (de) 1997-11-06
FR2745643A1 (fr) 1997-09-05
US5805350A (en) 1998-09-08
JPH09243917A (ja) 1997-09-19

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Legal Events

Date Code Title Description
CA Change of address
CD Change of name or company name
ST Notification of lapse

Effective date: 20091130