JPH0576020B2 - - Google Patents

Info

Publication number
JPH0576020B2
JPH0576020B2 JP63135317A JP13531788A JPH0576020B2 JP H0576020 B2 JPH0576020 B2 JP H0576020B2 JP 63135317 A JP63135317 A JP 63135317A JP 13531788 A JP13531788 A JP 13531788A JP H0576020 B2 JPH0576020 B2 JP H0576020B2
Authority
JP
Japan
Prior art keywords
output
light
light source
level
rise
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
JP63135317A
Other languages
English (en)
Japanese (ja)
Other versions
JPH01303425A (ja
Inventor
Yasushi Nakanishi
Atsushi Ubukawa
Masakyo Okuda
Masanori Mori
Yukio Nakai
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
Priority to JP63135317A priority Critical patent/JPH01303425A/ja
Priority to US07/359,289 priority patent/US4990957A/en
Publication of JPH01303425A publication Critical patent/JPH01303425A/ja
Publication of JPH0576020B2 publication Critical patent/JPH0576020B2/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
    • G03G15/50—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
    • 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)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Control Or Security For Electrophotography (AREA)
JP63135317A 1988-05-31 1988-05-31 自動露光装置 Granted JPH01303425A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP63135317A JPH01303425A (ja) 1988-05-31 1988-05-31 自動露光装置
US07/359,289 US4990957A (en) 1988-05-31 1989-05-31 Automatic exposure device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63135317A JPH01303425A (ja) 1988-05-31 1988-05-31 自動露光装置

Publications (2)

Publication Number Publication Date
JPH01303425A JPH01303425A (ja) 1989-12-07
JPH0576020B2 true JPH0576020B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-10-21

Family

ID=15148919

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63135317A Granted JPH01303425A (ja) 1988-05-31 1988-05-31 自動露光装置

Country Status (2)

Country Link
US (1) US4990957A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPH01303425A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5206686A (en) * 1990-03-20 1993-04-27 Minolta Camera Kabushiki Kaisha Apparatus for forming an image with use of electrophotographic process including gradation correction
JPH04166828A (ja) * 1990-10-31 1992-06-12 Nec Corp 自動光量調整装置
US5087942A (en) * 1991-05-28 1992-02-11 Eastman Kodak Company Automatic set-up for electrophotographic copying of transparency originals
JP3158654B2 (ja) * 1992-05-19 2001-04-23 ミノルタ株式会社 デジタルカラー画像形成装置
US5585927A (en) * 1992-05-19 1996-12-17 Minolta Camera Kabushiki Kaisha Digital image forming apparatus having gradation characteristic setting means
JP3053343B2 (ja) * 1994-11-14 2000-06-19 シャープ株式会社 画像形成装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182630A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1975-01-16 1976-07-20 Minolta Camera Kk
US4674863A (en) * 1983-08-10 1987-06-23 Canon Kabushiki Kaisha Image forming apparatus controlled by a plurality of image density detectors
JPH0820680B2 (ja) * 1986-03-04 1996-03-04 ミノルタ株式会社 複写機の露光量制御方法
US4796060A (en) * 1986-08-29 1989-01-03 Mita Industrial Co., Ltd. Automatic exposure device
JPS63244028A (ja) * 1987-03-31 1988-10-11 Sharp Corp 自動露光装置付き複写装置

Also Published As

Publication number Publication date
JPH01303425A (ja) 1989-12-07
US4990957A (en) 1991-02-05

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees