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 sourceInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59223062A (en) * | 1983-06-01 | 1984-12-14 | Canon Inc | Picture processing device |
DE3583969D1 (en) * | 1984-06-13 | 1991-10-10 | Fuji Photo Film Co Ltd | SENSOR DEVICE WITH SEMICONDUCTOR LASER. |
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)
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 |
-
1980
- 1980-11-04 JP JP55154936A patent/JPS5778191A/en active Pending
-
1981
- 1981-11-03 DE DE19813143571 patent/DE3143571A1/en active Granted
Cited By (1)
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 |
---|---|
DE3143571A1 (en) | 1982-07-29 |
DE3143571C2 (en) | 1991-02-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0215311A3 (en) | Laser diode driving circuit | |
AU4733285A (en) | Article or seed counter | |
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 | |
JPS5629112A (en) | Distance measurement unit | |
JPS5629216A (en) | Instantaneous photodetecting circuit | |
JPS53120393A (en) | Photo signal amplifier | |
FR2373932A1 (en) | Beam control circuit for camera tube - has beam equilibrium current increased when high illumination appears, increasing rate of target recharging | |
JPS5518906A (en) | Photoelectric position locator | |
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 | |
JPS55162175A (en) | Photoelectric converter | |
JPS57123566A (en) | Detector for non-signal recording part of record disk | |
JPS57207447A (en) | Bias system for avalanche photo diode |