Film writer and viewer system
US5036398A · kind A · utility
6Cited by
6References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1989 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Oct 3, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A film writer and viewer system operable to reduce the exposure requirements of the writer and thereby extend its life by providing a pre-exposure lamp to increase the density of the film to a first value and by providing an image enhancer on the output of a video camera viewing the film to increase the contrast between the information on the film and the background for subsequent viewing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.