Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1981-04-28
1984-04-24
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
356 1, 356 4, G01J 120
Patent
active
044450290
ABSTRACT:
A distance detector capable of measuring the distance between the range detector and an object by directing a light emitted from a light emission element to the object and receiving the reflected light and advantageously adaptable particularly to small-sized cameras.
The light reflected on the object is received by a single light-receiving element. The reflected light is condensed by a condenser and concentrated on the light-receiving element. The light-receiving element comprises an element, for example a photopotentiometric element, varying in the electric output according to the position of the light spot of the reflected light. The output of the element in the form of electric signal continuously varies in proportion to the distance between the range detector and the object.
REFERENCES:
patent: 3936187 (1976-02-01), Momose
patent: 4178098 (1979-12-01), Asano et al.
patent: 4303320 (1981-12-01), Isono
patent: 4304487 (1981-12-01), Odone et al.
patent: 4316657 (1982-02-01), Suguki et al.
Nagaoka Shinji
Satoh Koji
Adams Bruce L.
Brophy J. J.
Burns Robert E.
Lobato Emmanuel J.
Nelms David C.
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