JPS644775A - Laser beam writing device - Google Patents
Laser beam writing deviceInfo
- Publication number
- JPS644775A JPS644775A JP15982887A JP15982887A JPS644775A JP S644775 A JPS644775 A JP S644775A JP 15982887 A JP15982887 A JP 15982887A JP 15982887 A JP15982887 A JP 15982887A JP S644775 A JPS644775 A JP S644775A
- Authority
- JP
- Japan
- Prior art keywords
- output
- luminous intensity
- laser beam
- circuit
- detection signal
- 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)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
PURPOSE:To prevent the output of an abnormal image by detecting the position of radiating a laser beam on a photosensitive body by a luminous intensity detection means and outputting an abnormality detection signal according to the output. CONSTITUTION:The luminous intensity detector 22a outputs a current or a voltage in accordance with the intensity of the incident light of the laser beam 7a. The maximum value from a luminous intensity detection circuit 400 which inputs the output from the luminous intensity detector 22a is detected in a peak hold circuit 401 and the peak value is inputted in a comparator 402. It is compared with a reference voltage Vref set in a reference value setting circuit 403 in the comparator 402 and an abnormality detection signal generation circuit 404 generates the abnormality detection signal, by receiving the output from the comparison circuit 402. By detecting the deviation in the position of printing dots and generating the abnormality signal, the output of the abnormal image can be prevented from occurring in advance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15982887A JPS644775A (en) | 1987-06-29 | 1987-06-29 | Laser beam writing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15982887A JPS644775A (en) | 1987-06-29 | 1987-06-29 | Laser beam writing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS644775A true JPS644775A (en) | 1989-01-09 |
Family
ID=15702138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15982887A Pending JPS644775A (en) | 1987-06-29 | 1987-06-29 | Laser beam writing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS644775A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002042080A1 (en) * | 2000-11-21 | 2002-05-30 | Aetas Technology, Incorporated | Imaging-offset compensation methods and systems |
-
1987
- 1987-06-29 JP JP15982887A patent/JPS644775A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002042080A1 (en) * | 2000-11-21 | 2002-05-30 | Aetas Technology, Incorporated | Imaging-offset compensation methods and systems |
US6532029B1 (en) * | 2000-11-21 | 2003-03-11 | Aetas Technology Incorporated | Imaging-offset compensation methods and systems |
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