Image projecting system
US5010362A · kind A · utility
2Cited by
6References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1990 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | Sep 4, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/118
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image projecting system is disclosed which is provided with a carrier part disposed in an optical path between a light source and an image receiver such as, for example, a screen and a sensitive medium and adapted to be loaded with a microfilm. Inside the image projecting system, masking members for adjusting the range of the optical path are fitted. These masking members rotate around the optical axis of the optical path. Even when an image happens to be photographed aslant in the microfilm, only a stated area of the image is projected on the image receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.