Self-masking transparency viewing apparatus
US5430964A · kind A · utility
21Cited by
14References
11Claims
0Family size
Inventors
Key dates
| Filing date | Jun 30, 1992 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | Jun 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/024
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A viewing apparatus for transparencies or the like masks any display areas not covered by transparencies by generating masks without moving parts, and adapts the luminance level of the image under study and of other display areas to the optimal viewing conditions required by the observer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.