Distance measuring device for high-precisely measuring great lon

Details Distance measuring device for high-precisely measuring great lon Distance measuring device for high-precisely measuring great lon

1994-11-21

1996-02-20

Perkey, W. B.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 304, G03B 1336, G01C 308

Patent

active

054933625

ABSTRACT:
A light-emitting section projects distance measurement light to an object to be photographed. A light-receiving section receives a reflected light beam from the object, and outputs a pair of current signals corresponding to an incident position of the reflected light beam, and a light amount signal corresponding to an amount of received light beam. A storage section stores a correction value associated with a noise component (superposed on outputs from the light-receiving section) which does not depend on a distance to the object. A calculating section calculates the distance to the object on the basis of the pair of current signals using the light amount signal output and the correction value.

REFERENCES:
patent: 4423934 (1984-01-01), Lambeth et al.
patent: 4939533 (1990-07-01), Okada et al.
patent: 5185517 (1993-02-01), Inamori et al.
patent: 5257060 (1993-10-01), Kotani et al.
patent: 5337116 (1994-08-01), Nonaka et al.

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