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JPS5478155A - Modulating and deflecting device of light beam - Google Patents

Modulating and deflecting device of light beam

Info

Publication number
JPS5478155A
JPS5478155A JP13886777A JP13886777A JPS5478155A JP S5478155 A JPS5478155 A JP S5478155A JP 13886777 A JP13886777 A JP 13886777A JP 13886777 A JP13886777 A JP 13886777A JP S5478155 A JPS5478155 A JP S5478155A
Authority
JP
Japan
Prior art keywords
light
correction
modulator
light modulator
acousto
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.)
Granted
Application number
JP13886777A
Other languages
Japanese (ja)
Other versions
JPS628766B2 (en
Inventor
Teiichi Taneda
Yukio Sugiura
Norio Motoki
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.)
Japan Broadcasting Corp
Original Assignee
Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
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 Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Nippon Hoso Kyokai NHK
Priority to JP13886777A priority Critical patent/JPS5478155A/en
Publication of JPS5478155A publication Critical patent/JPS5478155A/en
Publication of JPS628766B2 publication Critical patent/JPS628766B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Mechanical Optical Scanning Systems (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To automatically correct power fluctuations and shading of a scanning beam by providing a light modulator for correction between a light source and an optical light modulator. CONSTITUTION:A light modulator 3 for correction is provided between a light beam source 1 and an acousto-optic modulator 5. As a result, a light beam 2 passes through the light modulagor 3 for correction and is converged by a converving lens 4, after which it is divided to first order diffracted light and zero order diffracted light by the acousto-optic light modulator 5. The divided light passes through a rotary polyhedral mirror 8 and beam splitter 10 and is radiated to the surface to be scanned 13. At the same time, part thereof is detected with a detector 15 and is compared with a reference value in a comparator 16. The deviation thereof is fthen inputted to the light modulator 3 for correction. Hence, the power fluctuations of the scanning beam caused by the variations in the reflectsnces of the mirror faces of the rotary polhedral irror 8 and the shanding based on the vignetting of the beam by the ridges of the mirror faces are auftomatically corrected.
JP13886777A 1977-11-21 1977-11-21 Modulating and deflecting device of light beam Granted JPS5478155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13886777A JPS5478155A (en) 1977-11-21 1977-11-21 Modulating and deflecting device of light beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13886777A JPS5478155A (en) 1977-11-21 1977-11-21 Modulating and deflecting device of light beam

Publications (2)

Publication Number Publication Date
JPS5478155A true JPS5478155A (en) 1979-06-22
JPS628766B2 JPS628766B2 (en) 1987-02-24

Family

ID=15231971

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13886777A Granted JPS5478155A (en) 1977-11-21 1977-11-21 Modulating and deflecting device of light beam

Country Status (1)

Country Link
JP (1) JPS5478155A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59208522A (en) * 1983-05-11 1984-11-26 Leo Giken:Kk Device for correcting error of optical scanning by rotary polyhedral body mirror
JPS61171273A (en) * 1985-01-25 1986-08-01 Nec Corp Photoscanner
JPS62178920A (en) * 1986-02-03 1987-08-06 Fuji Photo Film Co Ltd Light beam scanner
JPS6323462A (en) * 1979-05-24 1988-01-30 アメリカン　ヘキスト　コ−ポレ−シヨン Apparatus for forming image on output medium
JPH01180516A (en) * 1988-01-13 1989-07-18 Nec Corp Optical modulator
JP2003043398A (en) * 2001-07-27 2003-02-13 Ricoh Co Ltd Multibeam generating device and optical scanning type picture display device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6323462A (en) * 1979-05-24 1988-01-30 アメリカン　ヘキスト　コ−ポレ−シヨン Apparatus for forming image on output medium
JPS59208522A (en) * 1983-05-11 1984-11-26 Leo Giken:Kk Device for correcting error of optical scanning by rotary polyhedral body mirror
JPS61171273A (en) * 1985-01-25 1986-08-01 Nec Corp Photoscanner
JPS62178920A (en) * 1986-02-03 1987-08-06 Fuji Photo Film Co Ltd Light beam scanner
JPH01180516A (en) * 1988-01-13 1989-07-18 Nec Corp Optical modulator
JP2003043398A (en) * 2001-07-27 2003-02-13 Ricoh Co Ltd Multibeam generating device and optical scanning type picture display device

Also Published As

Publication number Publication date
JPS628766B2 (en) 1987-02-24

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