Illumination system for a film scanner
US5012346A · kind A · utility
27Cited by
23References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1989 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Oct 16, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An illumination system for a film scanner is disclosed which comprises a light source and optics for providing a line of light on a film. Light transmitted through the film is imaged onto photosensor elements such as CCD arays. In order to obtain a high quality electronic image, a xenon light source is used, color filters are included in the system to control the spectral content of the light provided to the film gate, and an integrating cylinder is used to provide a line of diffuse light on the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.