Light measuring device

Details Light measuring device Light measuring device

1986-04-29

1987-09-22

Perkey, W. B.

G03B 708

Patent

active

046951490

ABSTRACT:
A light measuring device for a camera, having a pyroelectric sensor for heat ray detection having substantially the same optical axis as that of a light measuring element for spot light measurement, whereby when the sensor detects an object to be photographed, a latch circuit latches the output of said light measuring element. The exposure value is thus controlled in response to the output of the latch circuit.

REFERENCES:
patent: 3399307 (1968-08-01), Levin
patent: 3580149 (1971-05-01), Fujis

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