Optical projection system with a novel lens system
US5504629A · kind A · utility
25Cited by
4References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1994 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | Dec 30, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3152
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical projection system, capable of displaying an M.times.N number of pixels and having a reduced optical path and hence a reduced size, wherein M and N are integers, comprises a non-point light source, an array of M.times.N actuated mirrors, a projection screen, a projection lens and a lens system including a first lens unit, a second lens unit and an optical baffle located therebetween, wherein the optical baffle is provided with a plurality of apertures and light absorbing regions, each of the lens units includes an array of M.times.N microlenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.