JPS56126820A - Light deflection device - Google Patents

Light deflection device

Info

Publication number
JPS56126820A
JPS56126820A JP3036980A JP3036980A JPS56126820A JP S56126820 A JPS56126820 A JP S56126820A JP 3036980 A JP3036980 A JP 3036980A JP 3036980 A JP3036980 A JP 3036980A JP S56126820 A JPS56126820 A JP S56126820A
Authority
JP
Japan
Prior art keywords
deflection
waveform
mirror
oscillating mirror
deflection angle
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
JP3036980A
Other languages
Japanese (ja)
Inventor
Hirotsugu Sawada
Masayasu Anzai
Akira Shimada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3036980A priority Critical patent/JPS56126820A/en
Publication of JPS56126820A publication Critical patent/JPS56126820A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems

Landscapes

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

Abstract

PURPOSE:To bring a light spot moving speed on the surface of projection close to an equal speed, by setting a mirror driving current waveform so that a speed of deflection angle becomes smaller as the deflection angle of an oscillating mirror is getting larger, in a light deflection device which has used an oscillating mirror. CONSTITUTION:The figure 1 shows a light deflection device, and the oscillating mirror 1 reflects an incident light beam 2 and forms a light spot 5 on the surface of projection 4. Deflection length X of the light spot 5 against the deflection angle theta of the mirror 1 becomes ltantheta. Therefore, X is not in proportion to theta and is unable to scan at an equal speed. Accordingly, as a waveform a1 shown in the figure 2(a), constitution is made so that a current value is gradually saturated as a driving current is getting larger (deflection angle theta becomes larger). The waveform a1 shows a saw tooth waveform which has been used therefore. Also, although the figure shows only the one side deflection of the oscillating mirror, it can be easily applied to a both side deflection system, as well. The periods A, B show a scanning period and a returning period, respectively.
JP3036980A 1980-03-12 1980-03-12 Light deflection device Pending JPS56126820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3036980A JPS56126820A (en) 1980-03-12 1980-03-12 Light deflection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3036980A JPS56126820A (en) 1980-03-12 1980-03-12 Light deflection device

Publications (1)

Publication Number Publication Date
JPS56126820A true JPS56126820A (en) 1981-10-05

Family

ID=12301947

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3036980A Pending JPS56126820A (en) 1980-03-12 1980-03-12 Light deflection device

Country Status (1)

Country Link
JP (1) JPS56126820A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57138615A (en) * 1981-02-19 1982-08-27 Yokogawa Hokushin Electric Corp Optical scanning device
JPS61117517A (en) * 1984-11-13 1986-06-04 Fuji Photo Film Co Ltd Method for correcting scanning speed of galvanometer
JPH02197813A (en) * 1989-01-26 1990-08-06 Matsushita Electric Works Ltd Scanner driving circuit for light beam scanning
JPH07209446A (en) * 1994-09-29 1995-08-11 Seiko Epson Corp Generating device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57138615A (en) * 1981-02-19 1982-08-27 Yokogawa Hokushin Electric Corp Optical scanning device
JPS61117517A (en) * 1984-11-13 1986-06-04 Fuji Photo Film Co Ltd Method for correcting scanning speed of galvanometer
JPH0462048B2 (en) * 1984-11-13 1992-10-05 Fuji Photo Film Co Ltd
JPH02197813A (en) * 1989-01-26 1990-08-06 Matsushita Electric Works Ltd Scanner driving circuit for light beam scanning
JPH07209446A (en) * 1994-09-29 1995-08-11 Seiko Epson Corp Generating device

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