In-finder indicator for single-lens reflex camera
US7433587B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2005 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Oct 26, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2215/0507
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An in-finder indicator for a single-lens reflex camera comprises an eyepiece lens, a reflecting mirror for reflecting a beam of light from a subject, a screen having a screen surface which is subjected to surface treatment to form prisms for presenting a superimposed indication and which forms an image of the subject based on the light beam reflected by the reflecting mirror, a dach mirror having a pair of mirror surfaces for reflecting the light beam from the screen, a reflecting surface for reflecting the light beam reflected by the dach mirror surfaces and introducing the light beam to the eyepiece lens, and an illumination member disposed in a laterally-offset space between the dach mirror surfaces and the screen and introducing an illumination beam to enter the screen surface laterally of the image formed on the screen surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.