JPS56106259A - Control device for quantity of light - Google Patents

Control device for quantity of light

Info

Publication number
JPS56106259A
JPS56106259A JP764380A JP764380A JPS56106259A JP S56106259 A JPS56106259 A JP S56106259A JP 764380 A JP764380 A JP 764380A JP 764380 A JP764380 A JP 764380A JP S56106259 A JPS56106259 A JP S56106259A
Authority
JP
Japan
Prior art keywords
light
beams
emitting device
light emitting
service life
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
JP764380A
Other languages
Japanese (ja)
Other versions
JPH0313586B2 (en
Inventor
Takashi Kitamura
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 JP764380A priority Critical patent/JPS56106259A/en
Priority to US06/225,345 priority patent/US4443695A/en
Priority to DE19813102185 priority patent/DE3102185A1/en
Priority to DE3153710A priority patent/DE3153710C2/en
Publication of JPS56106259A publication Critical patent/JPS56106259A/en
Publication of JPH0313586B2 publication Critical patent/JPH0313586B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales
    • H04N1/4005—Circuits exciting or modulating particular heads for reproducing continuous tone value scales with regulating circuits, e.g. dependent upon ambient temperature or feedback control
    • 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
    • G06K15/1204—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 involving the fast moving of an optical beam in the main scanning direction
    • G06K15/1209—Intensity control of the optical beam
    • G06K15/1214—Intensity control of the optical beam by feedback
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Semiconductor Lasers (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Laser Beam Printer (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To raise service life of a light emitting device, to render use of a fast response light emitting device unnecessary, and to elevate economic effect, by gradually increasing current applied to said device to a described quantity of light, and maintaining its quantity to drive it. CONSTITUTION:Semiconductor laser generator 1 emits forward laser beams (front beams) L and at the same time emits backward back beams BB. Such back beams BB is received with light detection circuit 11, a detection signal formed in accordance with the beam intensity is applied to control circuit 12 to control beam emission intensity of generator 1. In such a light equantity controller, current exceeding the necessary quantity is not supplied to the light emitting device, permitting service life of its device to be increased, and maximum value feedback type light quantity controller to be economically composed without using a fast response photodetector.
JP764380A 1980-01-25 1980-01-25 Control device for quantity of light Granted JPS56106259A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP764380A JPS56106259A (en) 1980-01-25 1980-01-25 Control device for quantity of light
US06/225,345 US4443695A (en) 1980-01-25 1981-01-15 Apparatus for controlling the quantity of light
DE19813102185 DE3102185A1 (en) 1980-01-25 1981-01-23 CONTROL DEVICE FOR RADIATION QUANTITY CONTROL
DE3153710A DE3153710C2 (en) 1980-01-25 1981-01-23 Light output monitor from semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP764380A JPS56106259A (en) 1980-01-25 1980-01-25 Control device for quantity of light

Publications (2)

Publication Number Publication Date
JPS56106259A true JPS56106259A (en) 1981-08-24
JPH0313586B2 JPH0313586B2 (en) 1991-02-22

Family

ID=11671503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP764380A Granted JPS56106259A (en) 1980-01-25 1980-01-25 Control device for quantity of light

Country Status (1)

Country Link
JP (1) JPS56106259A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58182558U (en) * 1982-05-28 1983-12-05 横河電機株式会社 optical scanning device
JPS59146456A (en) * 1983-02-10 1984-08-22 Canon Inc Controller of light quantity
JPS59147568A (en) * 1983-02-10 1984-08-23 Canon Inc Controller for quantity of light
JPS6038965A (en) * 1983-08-12 1985-02-28 Hitachi Ltd Laser beam printer controller
JPS61175656A (en) * 1985-01-30 1986-08-07 Ricoh Co Ltd Output controller of semiconductor laser
JPS62130579A (en) * 1985-12-03 1987-06-12 Ricoh Co Ltd Semiconductor laser driving circuit
JPS6356060A (en) * 1986-08-26 1988-03-10 Sharp Corp Control equipment for laser diode
JPH01179058A (en) * 1987-12-29 1989-07-17 Ricoh Co Ltd Method for controlling light quantity
JP2001092414A (en) * 1999-08-11 2001-04-06 Agilent Technol Inc Irradiating source calibrating method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5230997A (en) * 1975-07-08 1977-03-09 Atomic Energy Authority Uk Method of and device for engraving works by laser
JPS5413343A (en) * 1977-07-01 1979-01-31 Canon Inc Recording apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5230997A (en) * 1975-07-08 1977-03-09 Atomic Energy Authority Uk Method of and device for engraving works by laser
JPS5413343A (en) * 1977-07-01 1979-01-31 Canon Inc Recording apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58182558U (en) * 1982-05-28 1983-12-05 横河電機株式会社 optical scanning device
JPS59146456A (en) * 1983-02-10 1984-08-22 Canon Inc Controller of light quantity
JPS59147568A (en) * 1983-02-10 1984-08-23 Canon Inc Controller for quantity of light
JPH0555875B2 (en) * 1983-02-10 1993-08-18 Canon Kk
JPS6038965A (en) * 1983-08-12 1985-02-28 Hitachi Ltd Laser beam printer controller
JPH0224431B2 (en) * 1983-08-12 1990-05-29 Hitachi Ltd
JPS61175656A (en) * 1985-01-30 1986-08-07 Ricoh Co Ltd Output controller of semiconductor laser
JPS62130579A (en) * 1985-12-03 1987-06-12 Ricoh Co Ltd Semiconductor laser driving circuit
JPS6356060A (en) * 1986-08-26 1988-03-10 Sharp Corp Control equipment for laser diode
JPH01179058A (en) * 1987-12-29 1989-07-17 Ricoh Co Ltd Method for controlling light quantity
JP2001092414A (en) * 1999-08-11 2001-04-06 Agilent Technol Inc Irradiating source calibrating method

Also Published As

Publication number Publication date
JPH0313586B2 (en) 1991-02-22

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