Optical apparatus and cooling method thereof
US5860719A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1995 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | May 31, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3141
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light source such as a metal halide lamp is effectively cooled in an optical apparatus such as a liquid crystal projector. In an optical apparatus which includes a concave mirror 11, a light emitting section 12 arranged in a concave portion of the concave mirror along the optical axis and a cooling structure for cooling a periphery of the light emitting section, the cooling structure is provided with a means for generating an air flow 4, the direction of which is approximately perpendicular to the optical axis of the concave mirror 11, and a means for generating an air flow 5 circulating into the concave portion of the concave mirror 11.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.