JPS56140477A - Laser driving control system - Google Patents
Laser driving control systemInfo
- 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
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)
- Control Of Non-Electrical Variables (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Dot-Matrix Printers And Others (AREA)
- Facsimile Scanning Arrangements (AREA)
- Fax Reproducing Arrangements (AREA)
- Semiconductor Lasers (AREA)
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Exposure Or Original Feeding In Electrophotography (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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56105686A (en) * | 1980-01-28 | 1981-08-22 | Canon Inc | Controller for quantity of light |
-
1980
- 1980-04-02 JP JP4322480A patent/JPS56140477A/en active Granted
Patent Citations (1)
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)
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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