JPS5760309A - Laser scanning device - Google Patents

Laser scanning device

Info

Publication number
JPS5760309A
JPS5760309A JP55134584A JP13458480A JPS5760309A JP S5760309 A JPS5760309 A JP S5760309A JP 55134584 A JP55134584 A JP 55134584A JP 13458480 A JP13458480 A JP 13458480A JP S5760309 A JPS5760309 A JP S5760309A
Authority
JP
Japan
Prior art keywords
scanner
signal
laser
revolutions
ldc
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
JP55134584A
Other languages
Japanese (ja)
Inventor
Toru Kameyama
Junichi Kimizuka
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 JP55134584A priority Critical patent/JPS5760309A/en
Publication of JPS5760309A publication Critical patent/JPS5760309A/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
    • G02B26/12—Scanning systems using multifaceted mirrors
    • G02B26/121—Mechanical drive devices for polygonal mirrors
    • G02B26/122—Control of the scanning speed of the polygonal mirror

Landscapes

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

Abstract

PURPOSE:To improve the working method so that scanning devices work under a safer condition, by controlling the output of the laser beam in such a way that the laser beam cannot light when the deflection scanning speed of the laser scanning device is lower than a prescribed speed. CONSTITUTION:When a scanner is started and the number of revolutions reaches a rated value, a scanner ready signal B becomes ''H'' by a detecting circuit DC. On the other hand, a video signal C is inputted from a sequence controller SC irrespective of the number of revolutions of the scanner. Both signals B and C are inputted into an AND circuit to be connected to a laser driver LDC. Therefore, even when the signal C is inputted into the main body of a printer before the number of revolutions of the scanner reaches the rated value, the laser beam is not turned on, because the input signal of the LDC is under off-condition until the number of revolutions reaches the rated value. In this way, even when a laser 1 is left under on-condition due to trouble of an interlock caused when an opening-closing cover is opened and the scanner rotates at a very low speed, the off-signal is sent to an LDC and the laser 1 is extinguished, because the signal B becomes off.
JP55134584A 1980-09-27 1980-09-27 Laser scanning device Pending JPS5760309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55134584A JPS5760309A (en) 1980-09-27 1980-09-27 Laser scanning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55134584A JPS5760309A (en) 1980-09-27 1980-09-27 Laser scanning device

Publications (1)

Publication Number Publication Date
JPS5760309A true JPS5760309A (en) 1982-04-12

Family

ID=15131780

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55134584A Pending JPS5760309A (en) 1980-09-27 1980-09-27 Laser scanning device

Country Status (1)

Country Link
JP (1) JPS5760309A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079868A (en) * 1983-10-06 1985-05-07 Canon Inc Laser beam recorder
JPS6247262A (en) * 1985-08-26 1987-02-28 Oki Electric Ind Co Ltd Laser heating recorder
JPS6356451A (en) * 1986-08-27 1988-03-11 Canon Inc Laser recorder
JPH09183254A (en) * 1996-12-16 1997-07-15 Canon Inc Information recorder
JPH09254438A (en) * 1996-03-22 1997-09-30 Nec Niigata Ltd Photoscan device for electrophotographic printer
US7393107B2 (en) 2003-04-07 2008-07-01 Seiko Epson Corporation Rear-type projector
US8494212B2 (en) 2008-09-11 2013-07-23 Brother Kogyo Kabushiki Kaisha Head mounted display

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079868A (en) * 1983-10-06 1985-05-07 Canon Inc Laser beam recorder
JPH0512897B2 (en) * 1983-10-06 1993-02-19 Canon Kk
JPS6247262A (en) * 1985-08-26 1987-02-28 Oki Electric Ind Co Ltd Laser heating recorder
JPS6356451A (en) * 1986-08-27 1988-03-11 Canon Inc Laser recorder
JPH09254438A (en) * 1996-03-22 1997-09-30 Nec Niigata Ltd Photoscan device for electrophotographic printer
JPH09183254A (en) * 1996-12-16 1997-07-15 Canon Inc Information recorder
US7393107B2 (en) 2003-04-07 2008-07-01 Seiko Epson Corporation Rear-type projector
US7419266B2 (en) 2003-04-07 2008-09-02 Seiko Epson Corporation Projector
US8157387B2 (en) 2003-04-07 2012-04-17 Seiko Epson Corporation Projector that monitors mirror function to prevent point illumination
US8494212B2 (en) 2008-09-11 2013-07-23 Brother Kogyo Kabushiki Kaisha Head mounted display

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