Means for repeatedly measuring object distance responsive to pul

Details Means for repeatedly measuring object distance responsive to pul Means for repeatedly measuring object distance responsive to pul

1992-03-05

1993-12-07

Perkey, W. B.

354266, G03B 1336, G03B 1738

Patent

active

052687295

ABSTRACT:
The present invention comprises a distance measurement start signal output device for outputting a distance measurement start signal, a light projecting device for projecting a light flux to a distance measurement object multiple times in response to the distance measurement start signal, a light receiving device which is arranged a base length away from the light projecting device and receives the reflected light of the light flux from the distance measurement object, a distance information output circuit for outputting distance information according to the light receiving position of the reflected light in the light receiving device every time the light projecting device projects light, an arithmetic logic circuit for arithmetically and logically calculating a distance from the distance measurement object using an average of the distance information sent from the distance information output circuit, an exposure start signal output circuit for outputting an exposure start signal, and a control circuit for allowing the light projecting device to start light projection in response to an output of the distance measurement start signal, allowing the light projecting device to stop light projection in response to an output of the exposure start signal, and determining the distance from the distance measurement object according to the output of the arithmetic logic circuit.

REFERENCES:
patent: 4142788 (1979-03-01), Matsumoto et al.
patent: 4288151 (1981-09-01), Matsumoto et al.
patent: 4421396 (1983-12-01), Matsuzaki
patent: 4464037 (1984-08-01), Terui et al.
patent: 4777504 (1988-10-01), Akada et al.
patent: 4803507 (1989-02-01), Akashi et al.
patent: 5001508 (1991-03-01), Ogawa
patent: 5005970 (1991-04-01), Kunishige

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