Projector and illumination system thereof
US10386710B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2018 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Mar 28, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/48
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projector and an illumination system thereof are provided. The illumination system includes an excitation light source group, a phosphor wheel, a light combiner element and a first lens group. The excitation light source group provides a first beam and has a first optical axis. The phosphor wheel has a reflection region and a wavelength conversion region. The light combiner element is disposed between the excitation light source group and the phosphor wheel and has a dichroic portion and a reflection portion. The first lens group is disposed between the light combiner element and the phosphor wheel. The first lens group has a second optical axis. The illumination system is provided in the projector to reduce the number of optical elements, thereby reducing the cost and volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.