Polarization-separation device, optical scanning apparatus, and image forming apparatus
US8531766B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2010 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Sep 5, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0082
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A polarization-separation device includes: a beam splitter that includes a beam-separating surface, on which a light beam that contains a first light beam and a second light beam impinges, wherein polarization direction of the first light beam and polarization direction of the second light beam are perpendicular to each other, and incident angle of the first light beam and incident angle of the second beam vary independently while incident into the beam-separating surface; a first polarizer arranged in an optical path of light beams having transmitted through the beam splitter, and allows the first light beam to transmit therethrough; and a second polarizer arranged in an optical path of light beams reflected from the beam splitter, and allows the second light beam to transmit therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.