Optical scanner without extra convergent lens
US4717925A · kind A · utility
24Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1986 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Apr 7, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04794
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical scanner for use with a laser printer, a laser display or the like includes an optical deflector for directly scanning a photoconductive drum with a beam which is emitted from a semiconductor laser and to be focused as a minute spot on the drum. The frequency of an image scanning clock is continuously varied as an approximation to scanning speeds of a spot which is produced by the deflector. The intensity of the beam is controlled by an intensity control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.