Light measuring device for camera

Details Light measuring device for camera Light measuring device for camera

1984-05-17

1986-02-18

Perkey, William B.

354478, G03B 7099

Patent

active

045710503

ABSTRACT:
A light measuring device for a camera has a light receiving photo-sensitive element, the light receiving surface of which is divided at least into two regions including a center part and a peripheral part and a diffusing member which is disposed in front of the photo-sensitive element and is arranged to have a diffusing surface formed solely in the peripheral area thereof. The light measuring operation of the device is arranged to be shiftable between one mode in which light measurement is carried out solely through the center part of the light receiving surface of the photo-sensitive element and another mode in which light measurement is carried out approximately through the whole light receiving surface.

REFERENCES:
patent: 3232192 (1966-02-01), Stimson
patent: 3282178 (1966-11-01), Nelson
patent: 3450016 (1969-06-01), Yamada
patent: 3575095 (1971-04-01), Keck
patent: 3884584 (1975-05-01), Tsunekawa et al.
patent: 3967287 (1976-06-01), Kimura et al.
patent: 4309093 (1982-01-01), Kuwayama et al.
patent: 4437741 (1984-03-01), Sato

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