JPS56140477A - Laser driving control system - Google Patents

Laser driving control system

Info

Publication number
JPS56140477A
JPS56140477A JP4322480A JP4322480A JPS56140477A JP S56140477 A JPS56140477 A JP S56140477A JP 4322480 A JP4322480 A JP 4322480A JP 4322480 A JP4322480 A JP 4322480A JP S56140477 A JPS56140477 A JP S56140477A
Authority
JP
Japan
Prior art keywords
outputs
elements
laser
laser beam
photodetector
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
JP4322480A
Other languages
Japanese (ja)
Other versions
JPS6410152B2 (en
Inventor
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 JP4322480A priority Critical patent/JPS56140477A/en
Publication of JPS56140477A publication Critical patent/JPS56140477A/en
Publication of JPS6410152B2 publication Critical patent/JPS6410152B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G06K15/1238—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point
    • G06K15/1257—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on more than one main scanning line
    • G06K15/1261—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on more than one main scanning line using an array of light sources

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fax Reproducing Arrangements (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Laser Beam Printer (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)

Abstract

PURPOSE:To perform good light recording, by detecting respective laser beam in time series with the photodetector for synchronous detection and by performing an optimum feedback control for each laser element. CONSTITUTION:Photodetector 11 having a photodetection area to which laser beam emitted from semiconductor laser elements LD1-LD3 can be incident simultaneously is used, and laser beam emitted successively from elements LD1-LD3 at fixed intervals is detected in time series. Detected outputs are amplified in 13, and respective voltage values are sample-held in 141-143, and outputs are compared with reference values of comparators 151-153, and difference voltages are sent to laser driving circuits 171-173 through LPFs 161-163. Circuits 171-173 adjust driving currents supplied to elements LD1-LD3 so that outputs of comparator 151-153 become zero, thereby performing good light recording without uneveness of exposure.
JP4322480A 1980-04-02 1980-04-02 Laser driving control system Granted JPS56140477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4322480A JPS56140477A (en) 1980-04-02 1980-04-02 Laser driving control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4322480A JPS56140477A (en) 1980-04-02 1980-04-02 Laser driving control system

Publications (2)

Publication Number Publication Date
JPS56140477A true JPS56140477A (en) 1981-11-02
JPS6410152B2 JPS6410152B2 (en) 1989-02-21

Family

ID=12657936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4322480A Granted JPS56140477A (en) 1980-04-02 1980-04-02 Laser driving control system

Country Status (1)

Country Link
JP (1) JPS56140477A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5897882A (en) * 1981-12-08 1983-06-10 Nec Corp Wavelength stabilitzed semiconductor laser device
JPS60223374A (en) * 1984-04-20 1985-11-07 Fujitsu Ltd Electrophotographic type recorder
JPS6119184A (en) * 1984-07-05 1986-01-28 Matsushita Electric Ind Co Ltd Driving circuit for semiconductor laser
JPS6142182A (en) * 1984-08-02 1986-02-28 Matsushita Electric Ind Co Ltd Semiconductor laser drive circuit
JPS61159865A (en) * 1984-09-05 1986-07-19 Fuji Photo Film Co Ltd Light quantity correcting device in image output device
JPS61175656A (en) * 1985-01-30 1986-08-07 Ricoh Co Ltd Output controller of semiconductor laser
JPS62240919A (en) * 1986-04-14 1987-10-21 Canon Inc Image recorder
JPS62273862A (en) * 1986-05-23 1987-11-27 Ricoh Co Ltd Output controller for semiconductor laser array
JPS63146062A (en) * 1986-12-10 1988-06-18 Canon Inc Image recorder
JPS63198387A (en) * 1987-02-13 1988-08-17 Hitachi Ltd Semiconductor laser array device
JPH01179058A (en) * 1987-12-29 1989-07-17 Ricoh Co Ltd Method for controlling light quantity
JPH02188277A (en) * 1989-01-18 1990-07-24 Fuji Xerox Co Ltd Integrated light density control of laser
JPH03134683A (en) * 1989-10-20 1991-06-07 Fuji Photo Film Co Ltd Automatic light quantity controller
EP1005121A2 (en) * 1998-11-25 2000-05-31 Canon Kabushiki Kaisha Laser driving apparatus, driving method thereof, and image-forming apparatus using it
JP2002318475A (en) * 2001-04-23 2002-10-31 Ricoh Co Ltd Image forming device
JP2006154013A (en) * 2004-11-26 2006-06-15 Fuji Xerox Co Ltd Optical scanner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56105686A (en) * 1980-01-28 1981-08-22 Canon Inc Controller for quantity of light

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56105686A (en) * 1980-01-28 1981-08-22 Canon Inc Controller for quantity of light

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5897882A (en) * 1981-12-08 1983-06-10 Nec Corp Wavelength stabilitzed semiconductor laser device
JPS60223374A (en) * 1984-04-20 1985-11-07 Fujitsu Ltd Electrophotographic type recorder
JPS6119184A (en) * 1984-07-05 1986-01-28 Matsushita Electric Ind Co Ltd Driving circuit for semiconductor laser
JPS6142182A (en) * 1984-08-02 1986-02-28 Matsushita Electric Ind Co Ltd Semiconductor laser drive circuit
JPS61159865A (en) * 1984-09-05 1986-07-19 Fuji Photo Film Co Ltd Light quantity correcting device in image output device
JPS61175656A (en) * 1985-01-30 1986-08-07 Ricoh Co Ltd Output controller of semiconductor laser
JPH0750257B2 (en) * 1986-04-14 1995-05-31 キヤノン株式会社 Image recorder
JPS62240919A (en) * 1986-04-14 1987-10-21 Canon Inc Image recorder
JPS62273862A (en) * 1986-05-23 1987-11-27 Ricoh Co Ltd Output controller for semiconductor laser array
JPS63146062A (en) * 1986-12-10 1988-06-18 Canon Inc Image recorder
JPS63198387A (en) * 1987-02-13 1988-08-17 Hitachi Ltd Semiconductor laser array device
JPH01179058A (en) * 1987-12-29 1989-07-17 Ricoh Co Ltd Method for controlling light quantity
JPH02188277A (en) * 1989-01-18 1990-07-24 Fuji Xerox Co Ltd Integrated light density control of laser
JPH03134683A (en) * 1989-10-20 1991-06-07 Fuji Photo Film Co Ltd Automatic light quantity controller
EP1005121A2 (en) * 1998-11-25 2000-05-31 Canon Kabushiki Kaisha Laser driving apparatus, driving method thereof, and image-forming apparatus using it
EP1005121A3 (en) * 1998-11-25 2002-10-16 Canon Kabushiki Kaisha Laser driving apparatus, driving method thereof, and image-forming apparatus using it
US6560256B1 (en) 1998-11-25 2003-05-06 Canon Kabushiki Kaisha Laser driving apparatus, driving method thereof, and image-forming apparatus using it
JP2002318475A (en) * 2001-04-23 2002-10-31 Ricoh Co Ltd Image forming device
JP2006154013A (en) * 2004-11-26 2006-06-15 Fuji Xerox Co Ltd Optical scanner
JP4622483B2 (en) * 2004-11-26 2011-02-02 富士ゼロックス株式会社 Optical scanning device

Also Published As

Publication number Publication date
JPS6410152B2 (en) 1989-02-21

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