Quick return beam splitter for a single lens reflex camera

Details Quick return beam splitter for a single lens reflex camera Quick return beam splitter for a single lens reflex camera

1982-08-12

1984-03-20

Gellner, Michael L.

354152, 354477, G03B 7099

Patent

active

044377401

ABSTRACT:
A quick return beam splitter for a single lens reflex camera for directing the light from a picture-taking lens to both a viewfinder optical system and an AF optical system having a photoarray sensor when a focal plane shutter is not being operated is provided. The beam splitter has a metal reflecting film of high reflection factor partly deposited by evaporation on the surface of a glass substrate, and a dielectric material reflecting film of low reflection factor deposited by evaporation on the metal reflecting film.

REFERENCES:
patent: 4081807 (1978-03-01), Urano et al.

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