JPS56104571A - Picture output device - Google Patents

Picture output device

Info

Publication number
JPS56104571A
JPS56104571A JP723080A JP723080A JPS56104571A JP S56104571 A JPS56104571 A JP S56104571A JP 723080 A JP723080 A JP 723080A JP 723080 A JP723080 A JP 723080A JP S56104571 A JPS56104571 A JP S56104571A
Authority
JP
Japan
Prior art keywords
grid plate
picture
intervals
light beam
mirror
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
JP723080A
Other languages
Japanese (ja)
Inventor
Takashi Kitamura
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 JP723080A priority Critical patent/JPS56104571A/en
Publication of JPS56104571A publication Critical patent/JPS56104571A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/047—Detection, control or error compensation of scanning velocity or position
    • H04N1/053—Detection, control or error compensation of scanning velocity or position in main scanning direction, e.g. synchronisation of line start or picture elements in a line

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To obtain a picture clock signal which does not affect to rotation variance of a rotary polygonal mirror, by irradiating a light beam to a grid plate where grid-form meshes of which period is larger than a picture element pitch and by detecting its permeation or reflection light. CONSTITUTION:One light beam from laser light source 1 passes through slit H of mirror 5 and is focused onto photosensitive drum 8. Another has the light path changed by mirror 5 and is focused onto grid plate 6. Grid plate 6 is provided with one stripe for N picture elements. The light beam which passe through the grid plate is incident to photodetector 7. If the speed of the light beam is not uniform even if the stripe intervals of grid plate are uniform, intervals of the output of detector 7 become irregular in respect to time. When the signal obtained by dividing intervals of the pulse train of irregular intervals by 1/10 are given as the clock signal for forming the picture, a normal picture is formed which is independent of speed irregularity of optical beam scanning and the distortion characteristic of the optical system.
JP723080A 1980-01-24 1980-01-24 Picture output device Pending JPS56104571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP723080A JPS56104571A (en) 1980-01-24 1980-01-24 Picture output device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP723080A JPS56104571A (en) 1980-01-24 1980-01-24 Picture output device

Publications (1)

Publication Number Publication Date
JPS56104571A true JPS56104571A (en) 1981-08-20

Family

ID=11660183

Family Applications (1)

Application Number Title Priority Date Filing Date
JP723080A Pending JPS56104571A (en) 1980-01-24 1980-01-24 Picture output device

Country Status (1)

Country Link
JP (1) JPS56104571A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991019373A1 (en) * 1990-05-29 1991-12-12 S & R Tech Development, Inc. Scanner with non-linearity compensating pixel clock
JPH0589707A (en) * 1991-09-30 1993-04-09 Tokyo Electric Co Ltd Box formed by bending
EP0748098A3 (en) * 1991-11-07 1997-03-12 Nippon Kogaku Kk Video clock signal generator in an optical scan type image input device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991019373A1 (en) * 1990-05-29 1991-12-12 S & R Tech Development, Inc. Scanner with non-linearity compensating pixel clock
JPH0589707A (en) * 1991-09-30 1993-04-09 Tokyo Electric Co Ltd Box formed by bending
EP0748098A3 (en) * 1991-11-07 1997-03-12 Nippon Kogaku Kk Video clock signal generator in an optical scan type image input device

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