Illumination system and projection apparatus
US9897907B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2014 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Jan 24, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/204
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination system includes a coherent light source, a first light-combining element, an optical wavelength conversion module, and a first auxiliary light source. The coherent light source emits a coherent light beam. The first light-combining element is disposed on a transmission path of the coherent light beam. The light wavelength conversion module is disposed on a transmission path of the coherent light beam transmitted from the first light-combining element and converts the coherent light beam into a first converted light beam, and reflects the first converted light beam back to the first light-combining element. The first auxiliary light source emits a first auxiliary light beam which is transmitted to the first light-combining element along the transmission path of the coherent light beam. The first light-combining element combines the first auxiliary light beam and the first converted light beam. A projection apparatus is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.