Prism system and a liquid crystal projection device
US5594591A · kind A · utility
25Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1995 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Feb 1, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dichroic mirror is formed on a surface of a prism except an incident surface for reflecting an entered ray having a predetermined wavelength. An optical thin film is formed on the incident surface as to totally reflect the ray reflected from the dichroic mirror. The optical thin film has a phase control function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.