JPS5768873A - Variable scale factor copying optical device which is capable of magnification and reduction - Google Patents

Variable scale factor copying optical device which is capable of magnification and reduction

Info

Publication number
JPS5768873A
JPS5768873A JP55145988A JP14598880A JPS5768873A JP S5768873 A JPS5768873 A JP S5768873A JP 55145988 A JP55145988 A JP 55145988A JP 14598880 A JP14598880 A JP 14598880A JP S5768873 A JPS5768873 A JP S5768873A
Authority
JP
Japan
Prior art keywords
group
focal length
magnification
moving
zoom 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.)
Granted
Application number
JP55145988A
Other languages
English (en)
Other versions
JPH0423269B2 (ja
Inventor
Ryota Ogawa
Yasunori Arai
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
Priority to JP55145988A priority Critical patent/JPS5768873A/ja
Priority to FR8119518A priority patent/FR2492548B1/fr
Priority to DE19813141187 priority patent/DE3141187A1/de
Priority to GB8131243A priority patent/GB2087088B/en
Publication of JPS5768873A publication Critical patent/JPS5768873A/ja
Priority to US06/561,143 priority patent/US4474462A/en
Priority to HK344/86A priority patent/HK34486A/xx
Publication of JPH0423269B2 publication Critical patent/JPH0423269B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/041—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with variable magnification

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lenses (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Projection-Type Copiers In General (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
JP55145988A 1980-10-18 1980-10-18 Variable scale factor copying optical device which is capable of magnification and reduction Granted JPS5768873A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP55145988A JPS5768873A (en) 1980-10-18 1980-10-18 Variable scale factor copying optical device which is capable of magnification and reduction
FR8119518A FR2492548B1 (fr) 1980-10-18 1981-10-16 Copieur optique a objectif a distance focale variable
DE19813141187 DE3141187A1 (de) 1980-10-18 1981-10-16 Optischer kopierer mit variabler abbildung
GB8131243A GB2087088B (en) 1980-10-18 1981-10-16 Variable magnification line-by-line photocopying
US06/561,143 US4474462A (en) 1980-10-18 1983-12-14 Variable magnification type optical copier in which the copying size can be increased or decreased
HK344/86A HK34486A (en) 1980-10-18 1986-05-15 Variable magnification type optical copier in which the copying size can be increased or decreased

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55145988A JPS5768873A (en) 1980-10-18 1980-10-18 Variable scale factor copying optical device which is capable of magnification and reduction

Publications (2)

Publication Number Publication Date
JPS5768873A true JPS5768873A (en) 1982-04-27
JPH0423269B2 JPH0423269B2 (ja) 1992-04-21

Family

ID=15397580

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55145988A Granted JPS5768873A (en) 1980-10-18 1980-10-18 Variable scale factor copying optical device which is capable of magnification and reduction

Country Status (6)

Country Link
US (1) US4474462A (ja)
JP (1) JPS5768873A (ja)
DE (1) DE3141187A1 (ja)
FR (1) FR2492548B1 (ja)
GB (1) GB2087088B (ja)
HK (1) HK34486A (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597441U (ja) * 1982-07-02 1984-01-18 旭光学工業株式会社 複写機の変倍光学装置
JPS597442U (ja) * 1982-07-02 1984-01-18 旭光学工業株式会社 複写機の変倍光学装置
JPS60218636A (ja) * 1984-04-16 1985-11-01 Asahi Optical Co Ltd ズ−ムレンズを用いた小型変倍複写機の焦点位置調整装置
JPH07306361A (ja) * 1994-05-11 1995-11-21 Canon Inc 小型のズームレンズ

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022122A (ja) * 1983-07-18 1985-02-04 Casio Comput Co Ltd 複写装置
GB2182784B (en) * 1985-08-14 1989-11-01 Asahi Optical Co Ltd Two group zoom lens for use in copying.
JPH07119931B2 (ja) * 1986-09-27 1995-12-20 富士写真光機株式会社 複写機用光学系
DK75688A (da) * 1988-02-15 1989-08-16 Oce Helioprint As Reprografisk linsesystem og kamera omfattende dette
JP2817088B2 (ja) * 1994-02-23 1998-10-27 矢崎総業株式会社 レバーロックの補強構造
US5946532A (en) * 1995-04-20 1999-08-31 Asahi Kogaku Kogyo Kabushiki Kaisha Variable magnification optical system with light shielding mechanism
JPH08340474A (ja) * 1995-06-12 1996-12-24 Asahi Optical Co Ltd カメラの像倍率調整装置
JP5701030B2 (ja) * 2010-12-06 2015-04-15 キヤノン株式会社 画像処理装置、画像処理方法、コンピュータプログラム

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039563A (ja) * 1973-07-09 1975-04-11
JPS5418135A (en) * 1977-06-15 1979-02-09 Saunders Louie George Main pillar and making method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3880498A (en) * 1973-10-15 1975-04-29 Xerox Corp Zoom lens assembly
JPS5841497B2 (ja) * 1976-05-31 1983-09-12 ミノルタ株式会社 スリット露光型複写機における露光量調整装置
DE2626917C3 (de) * 1976-06-16 1980-11-20 Canon K.K., Tokio Fotokopiergerät
US4135812A (en) * 1977-06-20 1979-01-23 Xerox Corporation Magnification change mechanism
JPS5425747A (en) * 1977-07-28 1979-02-26 Minolta Camera Co Ltd Zoom lens system
US4304466A (en) * 1978-09-11 1981-12-08 Vivitar Corporation Zoom lens
JPS5813887B2 (ja) * 1979-06-20 1983-03-16 旭光学工業株式会社 複写変倍レンズ系

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039563A (ja) * 1973-07-09 1975-04-11
JPS5418135A (en) * 1977-06-15 1979-02-09 Saunders Louie George Main pillar and making method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597441U (ja) * 1982-07-02 1984-01-18 旭光学工業株式会社 複写機の変倍光学装置
JPS597442U (ja) * 1982-07-02 1984-01-18 旭光学工業株式会社 複写機の変倍光学装置
JPH0320827Y2 (ja) * 1982-07-02 1991-05-07
JPH0320826Y2 (ja) * 1982-07-02 1991-05-07
JPS60218636A (ja) * 1984-04-16 1985-11-01 Asahi Optical Co Ltd ズ−ムレンズを用いた小型変倍複写機の焦点位置調整装置
JPH07306361A (ja) * 1994-05-11 1995-11-21 Canon Inc 小型のズームレンズ

Also Published As

Publication number Publication date
US4474462A (en) 1984-10-02
FR2492548B1 (fr) 1986-07-25
GB2087088A (en) 1982-05-19
JPH0423269B2 (ja) 1992-04-21
DE3141187A1 (de) 1982-07-08
FR2492548A1 (fr) 1982-04-23
HK34486A (en) 1986-05-23
GB2087088B (en) 1985-01-09

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