Optical scanning apparatus and image forming apparatus and electrophotographic printer using such scanning apparatus
US6362470B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2000 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Jan 21, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04744
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical scanning apparatus is capable of scanning a surface with a plurality of fluxes of light along a principal scanning direction. In the apparatus, a plurality of fluxes of light are emitted by a plurality of light sources arranged at intervals along an auxiliary scanning direction perpendicular to the principal scanning direction. The plurality of fluxes of light are lead to an optical deflector via an optical system for incident light and deflected by the optical deflector. Most part of the deflected fluxes of light are lead to the surface via an imaging optical system for scanning the surface, while small part of the deflected fluxes of light are lead to a photodetector to generate a synchronizing signal for controlling the timing of the scanning start of each of the fluxes of light. A slit is arranged between the optical deflector and the photodetector and the slit is inclined relative to the auxiliary scanning direction, whereby the scanning start timings for the plurality of fluxes of light are adjusted. The optical scanning apparatus is used in an image forming apparatus or an electrophotographic printer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.