JPS5674275A - Scanning method in laser printer - Google Patents
Scanning method in laser printerInfo
- Publication number
- JPS5674275A JPS5674275A JP15128279A JP15128279A JPS5674275A JP S5674275 A JPS5674275 A JP S5674275A JP 15128279 A JP15128279 A JP 15128279A JP 15128279 A JP15128279 A JP 15128279A JP S5674275 A JPS5674275 A JP S5674275A
- Authority
- JP
- Japan
- Prior art keywords
- scanning
- incident angle
- light
- images
- synchronizing
- 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
Abstract
PURPOSE: To make possible the formation of good quanlity images which do not cause density differences etc. by controlling scanning light intensity according to the incident angle to a scanning plane.
CONSTITUTION: If the synchronizing beam position detector 18 provided at one end etc. of a photosensitive drum 9 detects the scanning beam light through a polyhedron 7 etc., a synchronizing signal is generated from a synchronizing signal generator 19 and is applied to a function signal generator 20 etc. As a result, the generator 20 generates the required function signal corresponding to the incident angle of the scanning beam to the scanning plane and corrects the current distribution outputted by a reference signal generating circuit 23 by way of an adder 22. A current driving circuit 25 is then controlled via a comparator 24 for controlling feedback, and a semiconductor laser 1b generates the laser light of the light intensity which is higher as the incident angle to the scanning face is larger. Hence, the scanning light distribution of the scanning plane becomes constant irrespective of the scanning incident angle, and the occurrence of uneven densities of the images by the scanning light is prevented, thus the good quality images of faithfully reproduced gradation characteristic are formed.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15128279A JPS5674275A (en) | 1979-11-21 | 1979-11-21 | Scanning method in laser printer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15128279A JPS5674275A (en) | 1979-11-21 | 1979-11-21 | Scanning method in laser printer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5674275A true JPS5674275A (en) | 1981-06-19 |
JPH0251188B2 JPH0251188B2 (en) | 1990-11-06 |
Family
ID=15515266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15128279A Granted JPS5674275A (en) | 1979-11-21 | 1979-11-21 | Scanning method in laser printer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5674275A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6016058A (en) * | 1983-07-08 | 1985-01-26 | Hitachi Ltd | Optical beam scanning device |
US6750892B2 (en) | 2000-07-13 | 2004-06-15 | Fuji Xerox Co., Ltd. | Density correction method and image forming apparatus |
WO2018168074A1 (en) * | 2017-03-14 | 2018-09-20 | オムロン株式会社 | High-frequency oscillation measuring system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3840794B2 (en) | 1998-04-13 | 2006-11-01 | 富士ゼロックス株式会社 | Laser drive device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5387747A (en) * | 1977-01-13 | 1978-08-02 | Ricoh Co Ltd | Light quantity distribution correcting method of optical system by narrowband or single wavelength light |
JPS54115232A (en) * | 1978-02-28 | 1979-09-07 | Ricoh Co Ltd | Light recording device |
-
1979
- 1979-11-21 JP JP15128279A patent/JPS5674275A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5387747A (en) * | 1977-01-13 | 1978-08-02 | Ricoh Co Ltd | Light quantity distribution correcting method of optical system by narrowband or single wavelength light |
JPS54115232A (en) * | 1978-02-28 | 1979-09-07 | Ricoh Co Ltd | Light recording device |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6016058A (en) * | 1983-07-08 | 1985-01-26 | Hitachi Ltd | Optical beam scanning device |
JPH0475702B2 (en) * | 1983-07-08 | 1992-12-01 | Hitachi Ltd | |
US6750892B2 (en) | 2000-07-13 | 2004-06-15 | Fuji Xerox Co., Ltd. | Density correction method and image forming apparatus |
WO2018168074A1 (en) * | 2017-03-14 | 2018-09-20 | オムロン株式会社 | High-frequency oscillation measuring system |
JP2018151270A (en) * | 2017-03-14 | 2018-09-27 | オムロン株式会社 | High-frequency vibration measuring system |
Also Published As
Publication number | Publication date |
---|---|
JPH0251188B2 (en) | 1990-11-06 |
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