Optical apparatus
US6431710B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2001 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Jul 25, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3144
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical equipment having a discharge lamp for supplying light, and first, second and third light valves for projecting the light from the equipment, having an air intake opening arranged on one side of the equipment, a ventilation device associated with the air intake opening so as to draw in air from outside of the equipment through the air intake opening and a ventilation path arranged between an outlet of the ventilation device and the first, second and third light valves. The ventilation path includes a plurality of partition members which divide the ventilation path into first, second and third air flow paths so as to cool the first, second and third light valves respectively by air from the ventilation device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.