Distance measuring apparatus

Details Distance measuring apparatus Distance measuring apparatus

1997-01-09

2000-07-04

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging to a point with one projected beam

2502016, 356 311, 396106, 396121, G01C 308, G02B 704, G03B 1300

Patent

active

060846585

ABSTRACT:
A distance measuring apparatus provided with a plurality of light-emitting units and a plurality of light-receiving units. The light emission period of each of the light-emitting units is changed over at each predetermined period interval. A plurality of light-receiving elements constituting each light-receiving unit are constructed so as to receive the reflected lights from a plurality of distance measurement fields of view on an object to be photographed in a plurality of distance measurement zones obtained by dividing a range to be measured into several blocks. The input signal from each of the light-receiving elements in each of the distance measurement zones is changed over in synchronism with the light emission period of the light-emitting units and the output signals for the respective distance measurement zones are compared, whereby a distance data indicative of the distance measurement zone most approximate to the object distance is put out.

REFERENCES:
patent: Re27461 (1972-08-01), Harvey
patent: 3435744 (1969-04-01), Stimson
patent: 3442193 (1969-05-01), Pagel
patent: 3618499 (1971-11-01), Harvey
patent: 3781111 (1973-12-01), Fletcher et al.
patent: 4470681 (1984-09-01), Johnson
patent: 4582424 (1986-04-01), Kawabata
Kojima, Akio, "A Consideration Of Future Auto-Focusing Cameras", Camera Mainichi (Oct. 1981) (and English translation).

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