Multibeam scanning apparatus
US6775041B1 · kind B1 · utility
21Cited by
16References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2000 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Apr 19, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/124
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multibeam scan apparatus includes a light source having semiconductor laser diodes and coupling lenses arranged in a main scan direction. The semiconductor laser diodes are positioned so that light beams emitted by the semiconductor laser diodes substantially cross each other at a point. A light beam restricting unit shapes the light beams from the laser diodes through the coupling lenses so that the light beams have a given spot size. The light beam restricting unit is positioned close to the above-mentioned point. A scan lens causes the light beams reflected by a polygonal mirror to form images on a scanned surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.