De-centered lens group for use in an off-axis projector
US6076931A · kind A · utility
21Cited by
20References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1997 |
| Grant date | Jun 20, 2000 |
| Priority date | — |
| Expiry date | Nov 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/7441
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection system includes a collimating lens group for collimating an imaging beam. The collimating lens group has an optical axis that is de-centered with respect to the axis of the imaging beam. Further, the optical axis of the collimating lens group forms a non-zero angle with the axis of the imaging beam. The de-centered collimating lens group enables the use of more conventional projection optics, without the unacceptable displacement of the projected image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.