JPS5773767A - Method of exposure for variable magnification copier - Google Patents

Method of exposure for variable magnification copier

Info

Publication number
JPS5773767A
JPS5773767A JP14901180A JP14901180A JPS5773767A JP S5773767 A JPS5773767 A JP S5773767A JP 14901180 A JP14901180 A JP 14901180A JP 14901180 A JP14901180 A JP 14901180A JP S5773767 A JPS5773767 A JP S5773767A
Authority
JP
Japan
Prior art keywords
exposure
shading
plates
lens
amount
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.)
Pending
Application number
JP14901180A
Other languages
English (en)
Inventor
Masami Emoto
Junichi Kitabayashi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14901180A priority Critical patent/JPS5773767A/ja
Publication of JPS5773767A publication Critical patent/JPS5773767A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/54—Lamp housings; Illuminating means
    • G03B27/542—Lamp housings; Illuminating means for copying cameras, reflex exposure lighting

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
JP14901180A 1980-10-24 1980-10-24 Method of exposure for variable magnification copier Pending JPS5773767A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14901180A JPS5773767A (en) 1980-10-24 1980-10-24 Method of exposure for variable magnification copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14901180A JPS5773767A (en) 1980-10-24 1980-10-24 Method of exposure for variable magnification copier

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP7347289A Division JPH01280746A (ja) 1989-03-24 1989-03-24 変倍式複写機における露光方法

Publications (1)

Publication Number Publication Date
JPS5773767A true JPS5773767A (en) 1982-05-08

Family

ID=15465716

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14901180A Pending JPS5773767A (en) 1980-10-24 1980-10-24 Method of exposure for variable magnification copier

Country Status (1)

Country Link
JP (1) JPS5773767A (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891475A (ja) * 1981-11-27 1983-05-31 Canon Inc 画像形成装置
JPS6055325A (ja) * 1983-09-06 1985-03-30 Ricoh Co Ltd 変倍複写機における照度ムラ補正装置
US4806989A (en) * 1986-05-14 1989-02-21 Konishiroku Photo Industry Co., Ltd. Optical correction device
EP0902335A3 (en) * 1997-09-11 2000-04-12 Canon Kabushiki Kaisha Image reading apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918539B1 (ja) * 1970-07-11 1974-05-10
JPS5391728A (en) * 1977-01-24 1978-08-11 Ricoh Co Ltd Correction device for uneven intensity of illumination for variable multiplication copier
JPS5428632A (en) * 1977-08-05 1979-03-03 Konishiroku Photo Ind Co Ltd Method and apparatus of exposure correction in copying magnification varaible copying apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918539B1 (ja) * 1970-07-11 1974-05-10
JPS5391728A (en) * 1977-01-24 1978-08-11 Ricoh Co Ltd Correction device for uneven intensity of illumination for variable multiplication copier
JPS5428632A (en) * 1977-08-05 1979-03-03 Konishiroku Photo Ind Co Ltd Method and apparatus of exposure correction in copying magnification varaible copying apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891475A (ja) * 1981-11-27 1983-05-31 Canon Inc 画像形成装置
JPS6055325A (ja) * 1983-09-06 1985-03-30 Ricoh Co Ltd 変倍複写機における照度ムラ補正装置
US4806989A (en) * 1986-05-14 1989-02-21 Konishiroku Photo Industry Co., Ltd. Optical correction device
EP0902335A3 (en) * 1997-09-11 2000-04-12 Canon Kabushiki Kaisha Image reading apparatus

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