Reflex camera light detecting arrangement
US4064516A · kind A · utility
7Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1976 |
| Grant date | Dec 20, 1977 |
| Priority date | — |
| Expiry date | Mar 10, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light detecting system for a single lens reflex camera in which an image of the focusing screen is reflected to the normally unused surface of the pentaprism from a partially reflective surface in the viewfinder system. The reflective surface in one form may be glass-to-air interfaces on the viewfinder axis in the eyepiece, but also may be a thin partially reflecting coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.