JPS6456465A - Exposure correction device for laser beam printer - Google Patents
Exposure correction device for laser beam printerInfo
- Publication number
- JPS6456465A JPS6456465A JP62213737A JP21373787A JPS6456465A JP S6456465 A JPS6456465 A JP S6456465A JP 62213737 A JP62213737 A JP 62213737A JP 21373787 A JP21373787 A JP 21373787A JP S6456465 A JPS6456465 A JP S6456465A
- Authority
- JP
- Japan
- Prior art keywords
- scanning speed
- main scanning
- semiconductor laser
- output
- correction means
- 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
Landscapes
- Laser Beam Printer (AREA)
- Facsimile Scanning Arrangements (AREA)
- Fax Reproducing Arrangements (AREA)
Abstract
PURPOSE:To improve the quality of an image, by installing a correction means for modulating a modulation clock in terms of time with pulses in inverse proportion to main scanning speed and controlling a semiconductor laser driving means so that an output from a semiconductor laser is made to be proportioned to the main scanning speed. CONSTITUTION:In a laser beam scanning optical system where the main scanning speed is not equal, the modulation clock signal with which the semiconductor laser driving means 11 drives the semiconductor laser 1 is controlled to be modulated in terms of time with the pulses in inverse proportion to the main scanning speed by the correction means 14 so that the modulation clock is made short and a laser output time or period is shortened according to the main scanning speed. Since the correction means 14 controls the output from the semiconductor laser 1 so as to be in proportion to the main scanning speed, the laser output can be raised according to the main scanning speed. Then, an exposing state equivalent to the case where the main scanning speed is constant can be obtained even if the scanning speed varies. Thus, the image of good quality can be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62213737A JPS6456465A (en) | 1987-08-27 | 1987-08-27 | Exposure correction device for laser beam printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62213737A JPS6456465A (en) | 1987-08-27 | 1987-08-27 | Exposure correction device for laser beam printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6456465A true JPS6456465A (en) | 1989-03-03 |
Family
ID=16644174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62213737A Pending JPS6456465A (en) | 1987-08-27 | 1987-08-27 | Exposure correction device for laser beam printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6456465A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006224652A (en) * | 2005-01-20 | 2006-08-31 | Noritsu Koki Co Ltd | Laser exposure system |
| JP2008213440A (en) * | 2006-03-15 | 2008-09-18 | Ricoh Co Ltd | Image processing method, and image processing apparatus |
| JP2010076435A (en) * | 2008-08-28 | 2010-04-08 | Ricoh Co Ltd | Image processing method and image processing device |
| JP2018151423A (en) * | 2017-03-09 | 2018-09-27 | キヤノン株式会社 | Optical scanner and image forming apparatus including the same |
| JP6429944B1 (en) * | 2017-05-30 | 2018-11-28 | キヤノン株式会社 | Optical scanning device and image forming apparatus having the same |
-
1987
- 1987-08-27 JP JP62213737A patent/JPS6456465A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006224652A (en) * | 2005-01-20 | 2006-08-31 | Noritsu Koki Co Ltd | Laser exposure system |
| JP2008213440A (en) * | 2006-03-15 | 2008-09-18 | Ricoh Co Ltd | Image processing method, and image processing apparatus |
| JP2013060022A (en) * | 2006-03-15 | 2013-04-04 | Ricoh Co Ltd | Image processing method and image processing apparatus |
| JP2010076435A (en) * | 2008-08-28 | 2010-04-08 | Ricoh Co Ltd | Image processing method and image processing device |
| JP2018151423A (en) * | 2017-03-09 | 2018-09-27 | キヤノン株式会社 | Optical scanner and image forming apparatus including the same |
| JP6429944B1 (en) * | 2017-05-30 | 2018-11-28 | キヤノン株式会社 | Optical scanning device and image forming apparatus having the same |
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