Distance and light measuring device for single lens reflex camer

Details Distance and light measuring device for single lens reflex camer Distance and light measuring device for single lens reflex camer

1983-04-08

1984-09-11

Gellner, Michael L.

354479, G03B 7099

Patent

active

044706863

ABSTRACT:
A device for measuring distance and light in a single lens reflex camera includes first and second mirrors, a distance measuring element, and a light measuring element which are disposed on a mirror box. The second mirror extends obliquely from a rear side of the first mirror, and the second mirror has first and second surfaces which form different angles with the first mirror. The first surface is translucent so that light is reflected from and transmitted through it, while the second surface reflects the light which is transmitted through the first surface. The first surface reflects light towards a distance measuring element, while the second surface reflects light towards a light measuring element so that the mechanical arrangement of the distance and light measuring device is simplified.

REFERENCES:
patent: 4172643 (1979-10-01), Schulz et al.

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