Camera with superimpose display device
US5734428A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1995 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Mar 3, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2213/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is disclosed a superimpose device for a single-lens reflex camera, which has a finder optical system including a focusing screen, a pentagonal roof type prism, and an eyepiece lens, a reflection plate which is arranged near the prospective imaging plane the finder optical system, and has micro-prisms forming a display portion, a plurality of light sources arranged near the vertex of the prism, and a projection optical element for deflecting illumination light from each light source by a reflection surface, and projecting the deflected light toward a front upper portion of the prism. The display portion illuminated with the illumination light via the prism, and light reflected by the display portion is guided to the eyepiece lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.