Light-ray deviator for camera objective
US4182565A · kind A · utility
18Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 2, 1978 |
| Grant date | Jan 8, 1980 |
| Priority date | — |
| Expiry date | May 2, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A viewfinder system of a photographic or cinematographic camera, provided with a varifocal objective, is illuminated by light deviators including a fully reflective mirror intercepting part of the light rays passing from the fourth to the final component of the objective. The mirror has a body of dark-stained glass, designed to prevent spurious reflections at the edges, and is coated on its front surface with a reflective layer produced by vapor deposition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.