JPS5922932B2 - 変倍複写機における照度むら補正装置 - Google Patents

変倍複写機における照度むら補正装置

Info

Publication number
JPS5922932B2
JPS5922932B2 JP52005797A JP579777A JPS5922932B2 JP S5922932 B2 JPS5922932 B2 JP S5922932B2 JP 52005797 A JP52005797 A JP 52005797A JP 579777 A JP579777 A JP 579777A JP S5922932 B2 JPS5922932 B2 JP S5922932B2
Authority
JP
Japan
Prior art keywords
lens
magnification
document
illuminance
optical path
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
Application number
JP52005797A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5391728A (en
Inventor
達雄 谷
正夫 河野
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 JP52005797A priority Critical patent/JPS5922932B2/ja
Priority to GB2136/78A priority patent/GB1599680A/en
Priority to US05/871,260 priority patent/US4172658A/en
Priority to DE19782802939 priority patent/DE2802939A1/de
Publication of JPS5391728A publication Critical patent/JPS5391728A/ja
Publication of JPS5922932B2 publication Critical patent/JPS5922932B2/ja
Expired 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)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
JP52005797A 1977-01-24 1977-01-24 変倍複写機における照度むら補正装置 Expired JPS5922932B2 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP52005797A JPS5922932B2 (ja) 1977-01-24 1977-01-24 変倍複写機における照度むら補正装置
GB2136/78A GB1599680A (en) 1977-01-24 1978-01-19 Variable magnification copying apparatus
US05/871,260 US4172658A (en) 1977-01-24 1978-01-23 Image forming device of copying apparatus of the variable duplicate size type
DE19782802939 DE2802939A1 (de) 1977-01-24 1978-01-24 Abbildungseinrichtung fuer ein kopiergeraet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52005797A JPS5922932B2 (ja) 1977-01-24 1977-01-24 変倍複写機における照度むら補正装置

Publications (2)

Publication Number Publication Date
JPS5391728A JPS5391728A (en) 1978-08-11
JPS5922932B2 true JPS5922932B2 (ja) 1984-05-30

Family

ID=11621059

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52005797A Expired JPS5922932B2 (ja) 1977-01-24 1977-01-24 変倍複写機における照度むら補正装置

Country Status (4)

Country Link
US (1) US4172658A (US06272168-20010807-M00014.png)
JP (1) JPS5922932B2 (US06272168-20010807-M00014.png)
DE (1) DE2802939A1 (US06272168-20010807-M00014.png)
GB (1) GB1599680A (US06272168-20010807-M00014.png)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4260249A (en) * 1979-09-17 1981-04-07 International Business Machines Two slit illumination aperture
JPS5773767A (en) * 1980-10-24 1982-05-08 Ricoh Co Ltd Method of exposure for variable magnification copier
JPS57104953A (en) * 1980-12-22 1982-06-30 Ricoh Co Ltd Exposure method of variable power copying machine
US4505581A (en) * 1982-04-28 1985-03-19 Xerox Corporation Registration system for a photocopier
JPS5944037A (ja) * 1982-09-06 1984-03-12 Fuji Xerox Co Ltd 変倍複写機における照度むら補正装置
JPS59166236U (ja) * 1983-04-20 1984-11-07 ミノルタ株式会社 光量分布補正装置
US4653901A (en) * 1986-04-18 1987-03-31 Xerox Corporation Document imaging system using a three-dimensional relative illumination corrector
DK161170C (da) * 1986-05-02 1991-12-30 Eskofot As Apparat til opnaaelse af en oensket lysfordeling, fortrinsvis en i hovedsagen ensartet lysfordeling i billedplanet af et reproduktionskamera
US4806989A (en) * 1986-05-14 1989-02-21 Konishiroku Photo Industry Co., Ltd. Optical correction device
JPS62276556A (ja) * 1986-05-24 1987-12-01 Oak Seisakusho:Kk 光源移動型露光装置
JP2687523B2 (ja) * 1988-12-20 1997-12-08 ミノルタ株式会社 露光装置の照度むら補正装置
US5223889A (en) * 1992-03-03 1993-06-29 John Mouner Wedge exposure control system
US5337121A (en) * 1993-03-12 1994-08-09 Xerox Corporation Variable magnification copying apparatus
US7164510B1 (en) 1998-09-17 2007-01-16 Canon Kabushiki Kaisha Image scanning apparatus and method, and storage medium

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3469916A (en) * 1966-10-12 1969-09-30 Dennison Mfg Co Photographic copying apparatus
GB1194813A (en) * 1968-02-17 1970-06-10 Ricoh Kk Improvements in and relating to Optical Arrangements
JPS4821842Y1 (US06272168-20010807-M00014.png) * 1969-05-10 1973-06-26
US3829209A (en) * 1971-06-11 1974-08-13 Xerox Corp Image registration in a multiple magnification photocopying system
GB1426097A (en) * 1973-05-23 1976-02-25 Xerox Corp Reflective platen cover
US3897148A (en) * 1973-11-29 1975-07-29 Ibm Optical scanning system
JPS6014345B2 (ja) * 1974-12-25 1985-04-12 株式会社リコー 電子複写機における変倍スリツト露光方法
JPS567947Y2 (US06272168-20010807-M00014.png) * 1975-04-09 1981-02-21
US4029409A (en) * 1975-06-20 1977-06-14 Xerox Corporation Multi-mode optical scanning system
JPS5280034A (en) 1975-12-26 1977-07-05 Minolta Camera Co Ltd Illumination means for electrophotographic copying machine

Also Published As

Publication number Publication date
JPS5391728A (en) 1978-08-11
GB1599680A (en) 1981-10-07
US4172658A (en) 1979-10-30
DE2802939C2 (US06272168-20010807-M00014.png) 1987-03-26
DE2802939A1 (de) 1978-07-27

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