FR2761166B1 - Objectif a focale variable - Google Patents

Objectif a focale variable

Info

Publication number
FR2761166B1
FR2761166B1 FR9803572A FR9803572A FR2761166B1 FR 2761166 B1 FR2761166 B1 FR 2761166B1 FR 9803572 A FR9803572 A FR 9803572A FR 9803572 A FR9803572 A FR 9803572A FR 2761166 B1 FR2761166 B1 FR 2761166B1
Authority
FR
France
Prior art keywords
variable focal
focal lens
lens
variable
focal
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
FR9803572A
Other languages
English (en)
Other versions
FR2761166A1 (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 FR2761166A1 publication Critical patent/FR2761166A1/fr
Application granted granted Critical
Publication of FR2761166B1 publication Critical patent/FR2761166B1/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
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/22—Telecentric objectives or lens systems
    • 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
    • G02B15/1455—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 the first group being negative
    • G02B15/145523—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 the first group being negative 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lenses (AREA)
FR9803572A 1997-03-24 1998-03-24 Objectif a focale variable Expired - Fee Related FR2761166B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9090105A JPH10268193A (ja) 1997-03-24 1997-03-24 ズームレンズ

Publications (2)

Publication Number Publication Date
FR2761166A1 FR2761166A1 (fr) 1998-09-25
FR2761166B1 true FR2761166B1 (fr) 2000-05-05

Family

ID=13989249

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9803572A Expired - Fee Related FR2761166B1 (fr) 1997-03-24 1998-03-24 Objectif a focale variable

Country Status (3)

Country Link
US (1) US6008952A (fr)
JP (1) JPH10268193A (fr)
FR (1) FR2761166B1 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4658275B2 (ja) 1999-04-08 2011-03-23 富士フイルム株式会社 ズームレンズ
JP4338827B2 (ja) * 1999-06-17 2009-10-07 フジノン株式会社 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
US6633436B2 (en) 2000-02-23 2003-10-14 Canon Kabushiki Kaisha Optical system, projection optical system, image projection apparatus having it, and image pickup apparatus
JP4616966B2 (ja) * 2000-04-27 2011-01-19 日東光学株式会社 投写用ズームレンズおよびプロジェクタ装置
JP4123683B2 (ja) 2000-05-17 2008-07-23 コニカミノルタオプト株式会社 ズームレンズ
JP4016576B2 (ja) * 2000-07-14 2007-12-05 株式会社日立製作所 投射用レンズ装置および投射型画像表示装置
JP3524482B2 (ja) * 2000-09-26 2004-05-10 キヤノン株式会社 ズームレンズ及びそれを用いた光学機器
US6545817B2 (en) * 2000-09-27 2003-04-08 Minolta Co., Ltd. Zoom lens system
JP2002148516A (ja) * 2000-11-08 2002-05-22 Fuji Photo Optical Co Ltd ズームレンズおよびこれを用いた投写型表示装置
US6476974B1 (en) * 2001-02-28 2002-11-05 Corning Precision Lens Incorporated Projection lenses for use with reflective pixelized panels
US6580564B2 (en) 2001-03-27 2003-06-17 Fuji Photo Optical Co., Ltd. Wide-angle zoom lens and projection-type display unit using it
JP2003140049A (ja) 2001-11-05 2003-05-14 Canon Inc 投影光学系及びそれを用いた投影装置
JP4060075B2 (ja) * 2001-12-26 2008-03-12 フジノン株式会社 ズームレンズおよび投写光学装置
JP4204797B2 (ja) * 2002-03-29 2009-01-07 フジノン株式会社 ズームレンズおよびこれを用いた投写型表示装置
US6801367B2 (en) 2002-06-12 2004-10-05 Fuji Photo Optical Co., Ltd. Zoom lens and projection display device which uses same
JP4233081B2 (ja) 2002-06-14 2009-03-04 フジノン株式会社 投映用ズームレンズおよびこれを用いた投写型表示装置
US6885506B2 (en) * 2003-02-05 2005-04-26 Pentax Corporation Wide-angle zoom lens system
JP2007187879A (ja) * 2006-01-13 2007-07-26 Konica Minolta Photo Imaging Inc 撮像光学系および撮像装置
JP5229962B2 (ja) * 2009-03-31 2013-07-03 富士フイルム株式会社 投写用広角ズームレンズおよび投写型表示装置
CN209765153U (zh) 2019-05-29 2019-12-10 中强光电股份有限公司 变焦投影镜头
JP7332546B2 (ja) * 2020-07-21 2023-08-23 富士フイルム株式会社 ズームレンズおよび撮像装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT287341B (de) * 1969-08-14 1971-01-25 Eumig Pankratisches Projektionsobjektiv
JP2516522B2 (ja) * 1992-04-21 1996-07-24 株式会社エルモ社 ワイドズ―ムレンズ
JP3352227B2 (ja) * 1994-05-13 2002-12-03 キヤノン株式会社 ズームレンズ
US5668668A (en) * 1995-03-08 1997-09-16 Nikon Corporation Zoom lens with five lens groups
JP3310854B2 (ja) * 1996-03-04 2002-08-05 富士写真光機株式会社 ワイドズームレンズ

Also Published As

Publication number Publication date
FR2761166A1 (fr) 1998-09-25
JPH10268193A (ja) 1998-10-09
US6008952A (en) 1999-12-28

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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: 20101130