Illumination optical system and a projector using the same
US9039187B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 2010 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | May 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/113
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention seeks to realize a small etendu illumination optical system, a longer operating life and a higher brightness. The illumination optical system comprises: a laser light source that generates an excitation light; a fluorescent substance that generates a fluorescent light in response to the excitation light, a light tunnel that outputs the excitation light input at one end thereof to the fluorescent substance from the other end thereof, and that outputs the fluorescent light generated by the fluorescent substance from the one end thereof; and a mirror that is placed within a light path between the laser light source and the light tunnel, and that reflects the fluorescent light, the mirror having an aperture formed thereon that allows the excitation light to pass through.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.