Echo reduction improvement in a front face glare reduction overlay
US4165920A · kind A · utility
14Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 27, 1977 |
| Grant date | Aug 28, 1979 |
| Priority date | — |
| Expiry date | Jul 27, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0018
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An overlay for use on a transmission screen is disclosed which reduces front face glare by providing a plurality of inclined surfaces on the front surface thereof to deflect ambient light away from the viewing area. A coating of opaque material is applied to the peaks of the inclined surfaces to substantially eliminate "echos" of the image being viewed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.