Linear light source
US5215370A · kind A · utility
24Cited by
14References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Nov 25, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/0284
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A linear light source for a film scanner is disclosed which includes an elongated light integrating cavity having diffusely reflective walls. Light is introduced into the cavity through an input port, and an output beam of diffuse illumination is produced through a slot which is generally parallel to the longitudinal axis of the integrating cavity. In order to provide a light source which can produce a beam of a desired angular distribution, plates are positioned adjacent the exit slot of the cavity to form channels through which the light exits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.