Optical scanning device and image forming apparatus
US8922863B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2012 |
| Grant date | Dec 30, 2014 |
| Priority date | — |
| Expiry date | Jul 20, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3058
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanning device separately scanning plural scan target surfaces in a first direction with light includes: a light source unit configured to emit first and second light beams mutually different in polarization state; an optical deflector configured to rotate around an axis parallel to a second direction perpendicular to the first direction, and deflect the emitted light beams; an imaging optical element provided on respective optical paths of the deflected light beams; a polarization adjustment element provided on the optical paths of the light beams transmitted through the imaging optical element, and configured to correct respective changes in polarization state of the light beams occurring during the transmission of the light beams through the imaging optical element; and a polarization separation element provided on the optical paths of the light beams emitted from the polarization adjustment element, and configured to separate the light beams from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.