Viewfinder for reflex camera
US4162498A · kind A · utility
0Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1977 |
| Grant date | Jul 24, 1979 |
| Priority date | — |
| Expiry date | Dec 2, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A viewfinder for a reflex camera for viewing the image formed through an objective lens comprises a reflecting member for reflecting a light flux from the objective lens in a predetermined direction, a transparent member for passing the reflected light therethrough, and a mat surface located at the exit side of the transparent member and convexly curved toward the entrance side of the transparent member. Thus, the image plane formed by the light flux passed from the objective lens through the transparent member is coincident with the mat surface convexly curved toward the entrance side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.