Optical scanner and image forming apparatus using optical scanner
US7672032B2 · kind B2 · utility
22Cited by
11References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2007 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Aug 15, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/40
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical axis of at least one surface of a resin-made diffracting lens is shifted in a main scanning direction with respect to an incident beam. A synchronous detection can cancel a problem of a misalignment in the main scanning direction due to a temperature variation. A light reflected from a second surface of the resin-made diffractive lens condenses on a position that is displaced in an optical axis direction from an optical beam outgoing point of a semiconductor laser, and thereby the light reflected again from the semiconductor laser does not form an image on a scanned surface and an impact on the image becomes low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.