JPS57181539A - Exposure controller for copying machine - Google Patents

Exposure controller for copying machine

Info

Publication number
JPS57181539A
JPS57181539A JP56066701A JP6670181A JPS57181539A JP S57181539 A JPS57181539 A JP S57181539A JP 56066701 A JP56066701 A JP 56066701A JP 6670181 A JP6670181 A JP 6670181A JP S57181539 A JPS57181539 A JP S57181539A
Authority
JP
Japan
Prior art keywords
voltage
exposure
dimming
applying
light source
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
JP56066701A
Other languages
English (en)
Inventor
Kazuo Uchimura
Akio Katsumata
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 JP56066701A priority Critical patent/JPS57181539A/ja
Priority to GB8212512A priority patent/GB2097960B/en
Priority to DE19823216245 priority patent/DE3216245A1/de
Publication of JPS57181539A publication Critical patent/JPS57181539A/ja
Pending 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
    • G03G15/043—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)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
JP56066701A 1981-04-30 1981-04-30 Exposure controller for copying machine Pending JPS57181539A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP56066701A JPS57181539A (en) 1981-04-30 1981-04-30 Exposure controller for copying machine
GB8212512A GB2097960B (en) 1981-04-30 1982-04-29 An exposure controller for a copying machine
DE19823216245 DE3216245A1 (de) 1981-04-30 1982-04-30 Belichtungssteuereinrichtung fuer ein kopiergeraet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56066701A JPS57181539A (en) 1981-04-30 1981-04-30 Exposure controller for copying machine

Publications (1)

Publication Number Publication Date
JPS57181539A true JPS57181539A (en) 1982-11-09

Family

ID=13323500

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56066701A Pending JPS57181539A (en) 1981-04-30 1981-04-30 Exposure controller for copying machine

Country Status (3)

Country Link
JP (1) JPS57181539A (ja)
DE (1) DE3216245A1 (ja)
GB (1) GB2097960B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6425140A (en) * 1987-07-21 1989-01-27 Sharp Kk Exposing device for copying machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54153038A (en) * 1978-05-23 1979-12-01 Minolta Camera Co Ltd Automatic exposure control device of electrophoto graphic copier
JPS559546A (en) * 1978-07-06 1980-01-23 Canon Inc Device having light source for exposure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182630A (ja) * 1975-01-16 1976-07-20 Minolta Camera Kk
US4024428A (en) * 1975-05-19 1977-05-17 Optical Associates, Incorporated Radiation-sensitive control circuit for driving lamp at various power levels
DE2926300A1 (de) * 1979-06-29 1981-01-08 Noell Gmbh Lagergestell fuer abgebrannte brennelemente aus kernkraftwerken

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54153038A (en) * 1978-05-23 1979-12-01 Minolta Camera Co Ltd Automatic exposure control device of electrophoto graphic copier
JPS559546A (en) * 1978-07-06 1980-01-23 Canon Inc Device having light source for exposure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6425140A (en) * 1987-07-21 1989-01-27 Sharp Kk Exposing device for copying machine

Also Published As

Publication number Publication date
GB2097960A (en) 1982-11-10
DE3216245C2 (ja) 1990-10-04
DE3216245A1 (de) 1982-11-25
GB2097960B (en) 1985-04-03

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