JPS57189161A - Controller for exposure - Google Patents

Controller for exposure

Info

Publication number
JPS57189161A
JPS57189161A JP56075479A JP7547981A JPS57189161A JP S57189161 A JPS57189161 A JP S57189161A JP 56075479 A JP56075479 A JP 56075479A JP 7547981 A JP7547981 A JP 7547981A JP S57189161 A JPS57189161 A JP S57189161A
Authority
JP
Japan
Prior art keywords
overall
adjusting
image
exposure
resistors
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
JP56075479A
Other languages
Japanese (ja)
Inventor
Kazumoto Tanaka
Katsunobu Ohara
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56075479A priority Critical patent/JPS57189161A/en
Publication of JPS57189161A publication Critical patent/JPS57189161A/en
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
    • G03G15/041—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
    • G03G15/0415—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 and means for controlling illumination or exposure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To maintain good image performance by providing plural discrete adjusting means which set exposure controlling electric powers in corrspondence respectively to the combinations of image magnifications and image densities and an overall adjusting means which adjusts each controlling electric power overall. CONSTITUTION:The high level outputs of a microcomputer 12 are transmitted respectively via inverters to variable resistors VR2, VR3, VR4, VR5, VR6, VR7, VR8, VR9, so that the voltages corresponding to the set values of the respective variable resistors are applied to a lamp 5 by a dimming circuit 13. The optimum image exposure is obtained by adjusting the resistors VR1-VR9 discretely. For example, when a photographic fog comes to be produced in the images, it is corrected by adjusting only the variable resistor VR10 for overall adjustment, whereby the good image performance free from photographic fogs is maintained.
JP56075479A 1981-05-18 1981-05-18 Controller for exposure Pending JPS57189161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56075479A JPS57189161A (en) 1981-05-18 1981-05-18 Controller for exposure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56075479A JPS57189161A (en) 1981-05-18 1981-05-18 Controller for exposure

Publications (1)

Publication Number Publication Date
JPS57189161A true JPS57189161A (en) 1982-11-20

Family

ID=13577465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56075479A Pending JPS57189161A (en) 1981-05-18 1981-05-18 Controller for exposure

Country Status (1)

Country Link
JP (1) JPS57189161A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59136728A (en) * 1983-01-26 1984-08-06 Canon Inc Image forming device
JPS59159153A (en) * 1983-02-28 1984-09-08 Canon Inc Reproducing and outputting device of image

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59136728A (en) * 1983-01-26 1984-08-06 Canon Inc Image forming device
JPH0541993B2 (en) * 1983-01-26 1993-06-25 Canon Kk
JPS59159153A (en) * 1983-02-28 1984-09-08 Canon Inc Reproducing and outputting device of image

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