Illumination system and projection apparatus
US9429829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2014 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Nov 17, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/208
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination system including at least one laser light source, a wavelength conversion device, and a two-dimensional (2D) anisotropic diffusion sheet is provided. The laser light source emits a laser beam, and the wavelength conversion device is located on a transmission path of the laser beam. The 2D anisotropic diffusion sheet is located on the transmission path of the laser beam and between the laser light source and the wavelength conversion device. Besides, the 2D anisotropic diffusion sheet allows the laser beam to have an increasing degree of a divergent angle in a first direction greater than an increasing degree of a divergent angle in a second direction. The first direction is substantially parallel to a slow axis of the laser beam. A projection apparatus is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.