Apparatus for controlling intensity of laser beam emitted from semiconductor laser unit
US5225850A · kind A · utility
13Cited by
6References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1990 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Dec 27, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0683
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an apparatus for adjusting the intensity of a light beam, the light beam from a semiconductor laser is deflected to scan a photosensitive drum and is detected to generate a positional signal by a photodetector outside of the drum. The intensity of the light beam is also detected by a monitor detector and compared with a predetermined value. The comparison result is latched in a latch circuit in accordance with the positional signal and the semiconductor laser is controlled depending on the latched comparison result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.