Illumination means for electrographic reproduction
US4239383A · kind A · utility
14Cited by
6References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1979 |
| Grant date | Dec 16, 1980 |
| Priority date | — |
| Expiry date | Sep 17, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/02895
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An illumination means for an electrographic reproduction machine in which a single light source is used in combination with a primary and a secondary elliptical reflector to furnish direct and reflected light as a narrow band of illumination and in which a third flat reflector is used to reflect a portion of the light from the light source which would not otherwise be directed in such a narrow band back into the primary and secondary reflectors to be reflected into the narrow band and to balance the direct and reflected light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.