JPS5778191A - Adjusting method and device for quantity of light in array type light source - Google Patents

Adjusting method and device for quantity of light in array type light source

Info

Publication number
JPS5778191A
JPS5778191A JP55154936A JP15493680A JPS5778191A JP S5778191 A JPS5778191 A JP S5778191A JP 55154936 A JP55154936 A JP 55154936A JP 15493680 A JP15493680 A JP 15493680A JP S5778191 A JPS5778191 A JP S5778191A
Authority
JP
Japan
Prior art keywords
light
light source
detector
peak
peak values
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
JP55154936A
Other languages
Japanese (ja)
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 JP55154936A priority Critical patent/JPS5778191A/en
Priority to DE19813143571 priority patent/DE3143571A1/en
Publication of JPS5778191A publication Critical patent/JPS5778191A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/06832—Stabilising during amplitude modulation
    • 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

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE: To accelerate the adjustment in the quantity of light by providing photodetecting means for detecting backwardly emitting beam at the rear of an array light source formed of a plurality of semiconductor lasers to detect the peak values of the respective lasers and adjusting the quantity of light so that the peak values become equal.
CONSTITUTION: A CCD detector 3 for detecting the backward emitting beam is arranged at the rear of an array light source 1 formed of a plurality of semiconductor lasers. To detect and equalize the peak values of the respective lasers, the output signal from a CCD detector 11 is inputted to line memory 13 through an A/D converter 12 as shown, and the output is detected by a peak detector 14 and is compared by a comparator 15 with the peak value to be referenced. Thereafter, the difference is obtained by a diference detector 16, a current value corresponding to the quantity of light to be corrected is obtained by a converter 17, and a laser driver formed of digital control power sources 19a∼19c is operated by a multiplexer 18.
COPYRIGHT: (C)1982,JPO&Japio
JP55154936A 1980-11-04 1980-11-04 Adjusting method and device for quantity of light in array type light source Pending JPS5778191A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55154936A JPS5778191A (en) 1980-11-04 1980-11-04 Adjusting method and device for quantity of light in array type light source
DE19813143571 DE3143571A1 (en) 1980-11-04 1981-11-03 Method and device for regulating the quantity of light of a light source arranged in a row

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55154936A JPS5778191A (en) 1980-11-04 1980-11-04 Adjusting method and device for quantity of light in array type light source

Publications (1)

Publication Number Publication Date
JPS5778191A true JPS5778191A (en) 1982-05-15

Family

ID=15595169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55154936A Pending JPS5778191A (en) 1980-11-04 1980-11-04 Adjusting method and device for quantity of light in array type light source

Country Status (2)

Country Link
JP (1) JPS5778191A (en)
DE (1) DE3143571A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963036A (en) * 1982-09-30 1984-04-10 Matsushita Electric Ind Co Ltd Optical information recording and reproducing device

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59223062A (en) * 1983-06-01 1984-12-14 Canon Inc Picture processing device
EP0165060B1 (en) * 1984-06-13 1991-09-04 Fuji Photo Film Co., Ltd. Semiconductor laser beam scanning device
JPS63198387A (en) * 1987-02-13 1988-08-17 Hitachi Ltd Semiconductor laser array device
DE3738014A1 (en) * 1987-11-09 1989-05-18 Winrich Dipl Ing Gall Method of generating coloured images on a carrier surface
JPH06112563A (en) * 1992-09-29 1994-04-22 Fujitsu Ltd Semiconductor laser drive circuit
DE19815567C2 (en) * 1997-11-26 2000-02-10 Hertz Inst Heinrich Monolithically integrated semiconductor laser array

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3878556A (en) * 1973-10-03 1975-04-15 Rca Corp Modularized laser diode assembly
DE2357721C3 (en) * 1973-11-19 1979-02-22 Hoechst Ag, 6000 Frankfurt Arrangement for lighting and scanning in projection copiers, in particular for electrophotographic copiers
DE2737345C2 (en) * 1976-08-20 1991-07-25 Canon K.K., Tokio/Tokyo Semiconductor laser device with a Peltier element
JPS5455821U (en) * 1977-09-27 1979-04-18
US4443695A (en) * 1980-01-25 1984-04-17 Canon Kabushiki Kaisha Apparatus for controlling the quantity of light

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963036A (en) * 1982-09-30 1984-04-10 Matsushita Electric Ind Co Ltd Optical information recording and reproducing device

Also Published As

Publication number Publication date
DE3143571C2 (en) 1991-02-28
DE3143571A1 (en) 1982-07-29

Similar Documents

Publication Publication Date Title
ZA856923B (en) A signal processing system for an article counter
EP0215311A3 (en) Laser diode driving circuit
EP0224185A3 (en) Laser diode driving circuit
JPS5778191A (en) Adjusting method and device for quantity of light in array type light source
GB2219709A (en) Multiple flash range finder
JPH08226974A (en) Photodiode array
JPS57204504A (en) Photodetection part of focus detector
TW330300B (en) Optoelectric converting apparatus and method
US20040022282A1 (en) Arrangement for monitoring the emission wavelength and power of an optical source
JPS57160221A (en) Analog to digital conversion system
JPS577679A (en) Beam control circuit for image pickup tube
JPS56154650A (en) Measuring apparatus of film blackening quantity
JPS56117942A (en) Abnormal sheet material detector in sheet material processor
JPS56133714A (en) Light level controlling system of optical scanner
JPS56110381A (en) Optical information recorder
JPS5710107A (en) Control system for scanning signal
JPS6459881A (en) Solid-state laser stabilizer
JPS5629111A (en) Distance measuring unit
JPS5375897A (en) Pulse laser output stabilization circuit
JPS55162175A (en) Photoelectric converter
JPS57207447A (en) Bias system for avalanche photo diode
JPS5491398A (en) Detector for duble insertion of paper currency
JPS5624505A (en) Sensitivity calibration method for light detector
JPS542771A (en) Position setting apparatus of moving objects
JPS52140226A (en) Automatic control system for bias light quantity