Available light marginal illumination system
US4047811A · kind A · utility
8Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1976 |
| Grant date | Sep 13, 1977 |
| Priority date | — |
| Expiry date | May 27, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0463
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A reproducing apparatus including an optical system for viewing an object such as a document and for projecting an image thereof onto a photosensitive surface selectively at a first copy image magnification or at a reduced copy image magnification. The optical system includes a lamp for illuminating the object. A margin illumination system is provided utilizing stray light derived from the lamp of the optics system for illuminating margin regions of the photosensitive surface to prevent their subsequent development. The margin illumination system is selectively operable in the reduction mode of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.