Light-measuring systems

Details Light-measuring systems Light-measuring systems

1974-03-29

1976-03-23

Smith, Alfred E.

Optics: measuring and testing

Photometers

Photoelectric

356226, 354 31, G01J 142, G03B 708

Patent

active

039457320

ABSTRACT:
A light-responsive system which includes a plurality of photosensitive elements respectively directed to different parts of a scene for respectively providing electrical inputs according to the brightness of the light at the different parts of the scene. The several inputs are supplied to a plurality of electrical circuits which in turn are connected with an output unit, these circuits operating in such a way that the output unit will be actuated only by that one of the inputs which corresponds to that part of the scene which has the maximum brightness or the minimum brightness. In this way it is possible to provide an output corresponding either to the maximum brightness of the scene or the minimum brightness of the scene without requiring scanning of the scene.

REFERENCES:
patent: 3651744 (1972-03-01), Okada
patent: 3652168 (1972-03-01), Yangi et al.
patent: 3772517 (1973-11-01), Smith

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