Film scanner illumination system having an automatic light control
US5155596A · kind A · utility
87Cited by
16References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1990 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Dec 3, 2010 |
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 arrays. In order to obtain a high quality electronic image from various types of film, an integrating cylinder is used to provide a line of diffuse light on the film, and light delivered to the integrating cylinder is controlled in accordance with the particular type of film being scanned and the operating conditions of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.