JPS5784440A - Optical scanning distortion correcting system - Google Patents

Optical scanning distortion correcting system

Info

Publication number
JPS5784440A
JPS5784440A JP16038980A JP16038980A JPS5784440A JP S5784440 A JPS5784440 A JP S5784440A JP 16038980 A JP16038980 A JP 16038980A JP 16038980 A JP16038980 A JP 16038980A JP S5784440 A JPS5784440 A JP S5784440A
Authority
JP
Japan
Prior art keywords
scanning
optical
modulator
laser beam
distortion
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
JP16038980A
Other languages
Japanese (ja)
Inventor
Iwao Hamaguchi
Isamu Shibata
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 JP16038980A priority Critical patent/JPS5784440A/en
Publication of JPS5784440A publication Critical patent/JPS5784440A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • G02F1/33—Acousto-optical deflection devices

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

PURPOSE:To prevent generation of a scanning distortion caused by a static or dynamic fall of an optical deflector, by providing a detector on a pre-scanning area before effective scanning of a laser beam, and feeding back a detecting signal to a modulator. CONSTITUTION:A laser beam oscillated from a laser oscillator 1 is sent to an acoustic and optical (AO) modulator through an optical system such as reflection mirrors 2, 3, a mask 4, etc., and in this modulator, optical modulation is executed in accordance with picture information BS. Subsequently, an optical signal on which a picture signal has been superposed is led onto a photosensitive drum 8 while being deflected by a rotary polyhedral mirror 6, and picture recording is executed. In this case, 2 photoelectric converting elements P1, P2 are placed in order in the sub-scanning direction in the pre-scanning area on the main sanning line of the laser beam to the photosensitive drum, a scanning distortion delta is detected by an output difference of each element, and in accordance with this result, the driving frequency of the AO modulator is varied, by which an angle of incidence of the laser beam to the optical deflector 6 is changed, and the distortion is corrected.
JP16038980A 1980-11-14 1980-11-14 Optical scanning distortion correcting system Pending JPS5784440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16038980A JPS5784440A (en) 1980-11-14 1980-11-14 Optical scanning distortion correcting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16038980A JPS5784440A (en) 1980-11-14 1980-11-14 Optical scanning distortion correcting system

Publications (1)

Publication Number Publication Date
JPS5784440A true JPS5784440A (en) 1982-05-26

Family

ID=15713900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16038980A Pending JPS5784440A (en) 1980-11-14 1980-11-14 Optical scanning distortion correcting system

Country Status (1)

Country Link
JP (1) JPS5784440A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0440464A (en) * 1990-06-06 1992-02-10 Shindengen Electric Mfg Co Ltd Exposing light quantity monitoring method of characteristic evaluating device for electrophotographic photosensitive drum
US5194981A (en) * 1988-10-21 1993-03-16 Asahi Kogaku Kogyo Kabushiki Kaisha Light scanning apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5194981A (en) * 1988-10-21 1993-03-16 Asahi Kogaku Kogyo Kabushiki Kaisha Light scanning apparatus
JPH0440464A (en) * 1990-06-06 1992-02-10 Shindengen Electric Mfg Co Ltd Exposing light quantity monitoring method of characteristic evaluating device for electrophotographic photosensitive drum

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