DE3605150C2 - - Google Patents

Info

Publication number
DE3605150C2
DE3605150C2 DE3605150A DE3605150A DE3605150C2 DE 3605150 C2 DE3605150 C2 DE 3605150C2 DE 3605150 A DE3605150 A DE 3605150A DE 3605150 A DE3605150 A DE 3605150A DE 3605150 C2 DE3605150 C2 DE 3605150C2
Authority
DE
Germany
Prior art keywords
exposure
signal
digital
subtraction
circuit
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
DE3605150A
Other languages
German (de)
English (en)
Other versions
DE3605150A1 (de
Inventor
Yasuo Fujiidera Osaka Jp Araki
Kazuyuki Nar Nara Jp Kurata
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Publication of DE3605150A1 publication Critical patent/DE3605150A1/de
Application granted granted Critical
Publication of DE3605150C2 publication Critical patent/DE3605150C2/de
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
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5025—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the original characteristics, e.g. contrast, density
    • 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
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/80—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus in dependence upon automatic analysis of the original
    • 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
    • G03G15/043—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 means for controlling illumination or exposure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
DE19863605150 1985-02-19 1986-02-18 Vorrichtung zum einstellen der belichtung in kopiergeraeten Granted DE3605150A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60033590A JPS61189579A (ja) 1985-02-19 1985-02-19 複写機の露光調整装置

Publications (2)

Publication Number Publication Date
DE3605150A1 DE3605150A1 (de) 1986-08-21
DE3605150C2 true DE3605150C2 (enExample) 1989-11-23

Family

ID=12390716

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863605150 Granted DE3605150A1 (de) 1985-02-19 1986-02-18 Vorrichtung zum einstellen der belichtung in kopiergeraeten

Country Status (3)

Country Link
US (1) US4699502A (enExample)
JP (1) JPS61189579A (enExample)
DE (1) DE3605150A1 (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806775A (en) * 1987-01-14 1989-02-21 Ricoh Company, Ltd. Image reading system using an LED array
JPS63244028A (ja) * 1987-03-31 1988-10-11 Sharp Corp 自動露光装置付き複写装置
JPS6477069A (en) * 1987-05-09 1989-03-23 Ricoh Kk Density control system for digital copying machine
US4916487A (en) * 1987-07-15 1990-04-10 Minolta Camera Kabushiki Kaisha Image forming apparatus
IT1218530B (it) * 1987-12-16 1990-04-19 Durst Phototechnik Srl Metodo e dispositivo di misura per la determinazione del tempo d'esposizione nella stampa fotografica
US4801978A (en) * 1987-12-30 1989-01-31 Xerox Corporation Image bar printer compensated for vibration-generated scan line errors
JP2685816B2 (ja) * 1988-06-30 1997-12-03 株式会社東芝 光量制御装置
JP2882585B2 (ja) * 1989-01-11 1999-04-12 富士写真フイルム株式会社 写真焼付方法
JP3023131B2 (ja) * 1990-03-06 2000-03-21 キヤノン株式会社 画像形成装置および方法
JP3160306B2 (ja) * 1991-03-29 2001-04-25 株式会社東芝 画像形成装置
US5400122A (en) * 1993-10-28 1995-03-21 Xerox Corporation Non-linear selectively variable copy contrast adjustment device
DE19613071C1 (de) * 1996-03-22 1997-10-16 Johnson & Johnson Gmbh Verfahren und Vorrichtung zum Umformen von Watteprodukten
US6094473A (en) * 1998-03-19 2000-07-25 Picker International, Inc. Digital automatic X-ray exposure control system
US20050087045A1 (en) * 2003-10-27 2005-04-28 Piotr Gryciuk Emergency tool and system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182630A (enExample) * 1975-01-16 1976-07-20 Minolta Camera Kk
JPS6026206B2 (ja) * 1978-01-12 1985-06-22 株式会社リコー 原稿読取機能を有する複写機における感光体露光光量調整方法
US4474453A (en) * 1979-04-18 1984-10-02 Ricoh Company, Ltd. Electrostatic copying apparatus
JPS5621165A (en) * 1979-07-28 1981-02-27 Mita Ind Co Ltd Exposure adjusting device of electrostatic type copying machine
JPS6051105B2 (ja) * 1979-12-24 1985-11-12 株式会社東芝 自動画質制御複写機
JPS5722265A (en) * 1980-07-16 1982-02-05 Toshiba Corp Exposure control device for copying machine
JPS57173859A (en) * 1981-04-20 1982-10-26 Canon Inc Exposure quantity controller of color picture forming device
US4474460A (en) * 1981-07-16 1984-10-02 Fuji Xerox Company Limited Microfilm copying machine
JPS58172654A (ja) * 1982-04-02 1983-10-11 Canon Inc 画像記録制御装置
JPS57201271A (en) * 1982-04-14 1982-12-09 Minolta Camera Co Ltd Automatic exposure controller for electrophotographic copying machine
US4640603A (en) * 1982-09-24 1987-02-03 Canon Kabushiki Kaisha Copying apparatus
JPS5979240A (ja) * 1982-10-29 1984-05-08 Hitachi Ltd 複写機の露光制御装置
US4542985A (en) * 1983-04-26 1985-09-24 Canon Kabushiki Kaisha Image formation apparatus
JPS6017438A (ja) * 1983-07-11 1985-01-29 Toshiba Corp 露光制御装置

Also Published As

Publication number Publication date
JPS61189579A (ja) 1986-08-23
US4699502A (en) 1987-10-13
DE3605150A1 (de) 1986-08-21

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8363 Opposition against the patent
8331 Complete revocation