Movable reflecting mirror for single lens reflex camera

Details Movable reflecting mirror for single lens reflex camera Movable reflecting mirror for single lens reflex camera

1981-10-19

1983-07-12

Perkey, William B.

354224, 350172, G03B 1912, G02B 2714

Patent

active

043927297

ABSTRACT:
A movable reflecting mirror for single lens reflex camera is adapted to permit photometry by utilizing part of the light from an object being photographed which has been transmitted through the reflecting mirror. A transmitting area is formed in part of the reflector of the mirror in a manner such that light incident on the reflecting mirror in the region of the transmitting area and reflected by the rear surface of the reflecting mirror is reflected again by the rear surface of the reflector.

REFERENCES:
patent: 1451774 (1923-04-01), Holbrook et al.
patent: 3668406 (1972-06-01), Reid et al.
patent: 3872484 (1975-03-01), Hashimoto et al.

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