FR2723217B1 - Viseur a image reelle a puissance variable - Google Patents

Viseur a image reelle a puissance variable

Info

Publication number
FR2723217B1
FR2723217B1 FR9509237A FR9509237A FR2723217B1 FR 2723217 B1 FR2723217 B1 FR 2723217B1 FR 9509237 A FR9509237 A FR 9509237A FR 9509237 A FR9509237 A FR 9509237A FR 2723217 B1 FR2723217 B1 FR 2723217B1
Authority
FR
France
Prior art keywords
real image
variable power
power real
image viewfinder
viewfinder
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
FR9509237A
Other languages
English (en)
Other versions
FR2723217A1 (fr
Inventor
Tetsuya Abe
Takayuki Ito
Sachio Hasushita
Moriyasu Kanai
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 FR2723217A1 publication Critical patent/FR2723217A1/fr
Application granted granted Critical
Publication of FR2723217B1 publication Critical patent/FR2723217B1/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
    • G02B15/143—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
    • G02B15/143105—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 +-+
FR9509237A 1994-07-29 1995-07-28 Viseur a image reelle a puissance variable Expired - Fee Related FR2723217B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17879894A JP3554366B2 (ja) 1994-07-29 1994-07-29 高変倍実像式ファインダー

Publications (2)

Publication Number Publication Date
FR2723217A1 FR2723217A1 (fr) 1996-02-02
FR2723217B1 true FR2723217B1 (fr) 1999-07-16

Family

ID=16054836

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9509237A Expired - Fee Related FR2723217B1 (fr) 1994-07-29 1995-07-28 Viseur a image reelle a puissance variable

Country Status (5)

Country Link
US (1) US5694244A (fr)
JP (1) JP3554366B2 (fr)
DE (1) DE19527810B4 (fr)
FR (1) FR2723217B1 (fr)
GB (1) GB2291981B (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100363958B1 (ko) * 1995-05-30 2003-03-26 삼성테크윈 주식회사 변배파인더
KR100236646B1 (ko) * 1997-05-21 2000-01-15 유무성 초소형 아포컬 줌 광학계
JP3306351B2 (ja) * 1997-09-29 2002-07-24 旭光学工業株式会社 実像式変倍ファインダー
JP3335302B2 (ja) * 1998-01-06 2002-10-15 旭光学工業株式会社 観察光学機器の防振光学系
US6118585A (en) * 1998-01-06 2000-09-12 Asahi Kogaku Kogyo Kabushiki Kaisha Optical system for observing equipment having image-vibration compensation system
JP3524408B2 (ja) * 1998-01-06 2004-05-10 キヤノン株式会社 観察光学系及びそれを有する光学機器
JPH11194262A (ja) * 1998-01-06 1999-07-21 Asahi Optical Co Ltd 像振れ補正系を有する観察用光学機器
JP3315922B2 (ja) * 1998-04-08 2002-08-19 旭光学工業株式会社 実像式ファインダ光学系
JP2000089104A (ja) * 1998-09-10 2000-03-31 Asahi Optical Co Ltd 観察光学機器の防振光学系
JP4447704B2 (ja) * 1999-10-20 2010-04-07 キヤノン株式会社 変倍光学系及びそれを有するカメラ
US6867917B1 (en) * 1999-11-09 2005-03-15 Pentax Corporation Real-image finder optical system
JP4573378B2 (ja) * 1999-11-12 2010-11-04 オリンパス株式会社 ズームレンズ
JP3680693B2 (ja) * 2000-03-21 2005-08-10 コニカミノルタフォトイメージング株式会社 実像式変倍ファインダ
JP3566698B2 (ja) * 2002-01-17 2004-09-15 キヤノン株式会社 ファインダー及びそれを用いた光学機器
JP4790250B2 (ja) * 2004-11-11 2011-10-12 オリンパス株式会社 デジタル一眼レフレックスカメラ
JP2013015636A (ja) * 2011-07-01 2013-01-24 Tamron Co Ltd 赤外線ズームレンズ
CN103748498B (zh) * 2011-08-15 2016-06-15 富士胶片株式会社 实像可变放大倍率取景器和成像设备
TWI737458B (zh) 2020-08-14 2021-08-21 大立光電股份有限公司 光學影像透鏡組、取像裝置及電子裝置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2859275B2 (ja) * 1988-10-26 1999-02-17 旭光学工業株式会社 ズームファインダー
US5193030A (en) * 1988-10-28 1993-03-09 Asahi Kogaku Kogyo K.K. Zoom finder system
US4992809A (en) * 1988-10-28 1991-02-12 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom finder system
JP2899019B2 (ja) * 1989-09-01 1999-06-02 キヤノン株式会社 ズームレンズ
US4991942A (en) * 1989-05-02 1991-02-12 Canon Kabushiki Kaisha Zoom lens
US5191477A (en) * 1990-02-22 1993-03-02 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom finder
US5260834A (en) * 1991-04-05 1993-11-09 Olympus Optical Co., Ltd. Small zoom lens system
JP3008580B2 (ja) * 1991-07-12 2000-02-14 キヤノン株式会社 ズームレンズ
US5410430A (en) * 1991-11-25 1995-04-25 Asahi Kogaku Kogyo Kabushiki Kaisha Variable power view finder
US5247324A (en) * 1991-12-13 1993-09-21 Eastman Kodak Company Real image zoom viewfinder
GB9226806D0 (en) * 1991-12-25 1993-02-17 Asahi Optical Co Ltd Zoom lens system
US5367399A (en) * 1992-02-13 1994-11-22 Holotek Ltd. Rotationally symmetric dual reflection optical beam scanner and system using same

Also Published As

Publication number Publication date
DE19527810B4 (de) 2005-03-24
GB2291981B (en) 1998-02-18
GB9515251D0 (en) 1995-09-20
US5694244A (en) 1997-12-02
JP3554366B2 (ja) 2004-08-18
JPH0843885A (ja) 1996-02-16
GB2291981A (en) 1996-02-07
DE19527810A1 (de) 1996-02-01
FR2723217A1 (fr) 1996-02-02

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Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20070330