JPS5711361A - Copying apparatus - Google Patents

Copying apparatus

Info

Publication number
JPS5711361A
JPS5711361A JP8501580A JP8501580A JPS5711361A JP S5711361 A JPS5711361 A JP S5711361A JP 8501580 A JP8501580 A JP 8501580A JP 8501580 A JP8501580 A JP 8501580A JP S5711361 A JPS5711361 A JP S5711361A
Authority
JP
Japan
Prior art keywords
source
illumination
light
photodetector
sensed
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
JP8501580A
Other languages
Japanese (ja)
Inventor
Haruhisa Honda
Tsutomu Toyono
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 JP8501580A priority Critical patent/JPS5711361A/en
Publication of JPS5711361A publication Critical patent/JPS5711361A/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
    • G03G15/043—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
    • G03G15/0435—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 by introducing an optical element in the optical path, e.g. a filter

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To obtain good image stability even if a relative spectral distrubiton of radiation light varies, by arranging a spectral distribution correction filter for allowing illumination sensed by a photoreceptor to correspond to that sensed by the photodetector of a light source. CONSTITUTION:Part of the illumination light of a light source 2 is detected with a photodetector 5 through the opening 4a of the source holder 4, an electric signal corresponding to the illumination is issued, and the illumination of the source 2 is controlled by the signal through a specified electric circuit so as to maintain the detection illumination constant. A spectral distribution correction filter 20 having a specified spectral transparency 20 is arranged just before a lens 8 in a light path. Accordingly, even if a relative spectral distribution of the source 2 varies with time, input of the source 2 is controlled so as to maintain output of the photodetector 5 constant, thus permitting an amount of light sensed with a photoreceptor to be kept almost constant, and a satisfactory image to be obtained by allowing the illuminations sensed by the photodetector 5 and the photoreceptor to correspond to each other.
JP8501580A 1980-06-23 1980-06-23 Copying apparatus Pending JPS5711361A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8501580A JPS5711361A (en) 1980-06-23 1980-06-23 Copying apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8501580A JPS5711361A (en) 1980-06-23 1980-06-23 Copying apparatus

Publications (1)

Publication Number Publication Date
JPS5711361A true JPS5711361A (en) 1982-01-21

Family

ID=13846909

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8501580A Pending JPS5711361A (en) 1980-06-23 1980-06-23 Copying apparatus

Country Status (1)

Country Link
JP (1) JPS5711361A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63146225U (en) * 1987-03-18 1988-09-27
EP2309482A2 (en) * 1998-10-30 2011-04-13 Semiconductor Energy Laboratory Co, Ltd. Field sequantial liquid crystal display device and driving method thereof, and head mounted display

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63146225U (en) * 1987-03-18 1988-09-27
EP2309482A2 (en) * 1998-10-30 2011-04-13 Semiconductor Energy Laboratory Co, Ltd. Field sequantial liquid crystal display device and driving method thereof, and head mounted display

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