Range detector

Details Range detector Range detector

1987-12-22

1989-07-18

Adams, Russell E.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 1, 250214D, G03B 300

Patent

active

048497819

ABSTRACT:
A range detector detects a range to an object to be measured by projecting light rays from a light source onto the object and producing an output signal by receiving light rays reflected by the object by a single semiconductor position detecting element (PSD) disposed at a given base length apart from the light source. The position detecting element is provided with signal electrodes of N pieces (N.ltoreq.3) in a separate manner and in a direction of the base length so that a light receiving plane of the PSD is divided into (N-1) areas. The range detector is capable of reducing a detectable close range so as to cover a very wide range by selectively deciding an output from these signal electrodes in accordance with a range to be measured without degrading accuracy of range measurements.

REFERENCES:
patent: 4441810 (1984-04-01), Momose et al.
patent: 4542971 (1985-09-01), Nomata
patent: 4615616 (1986-10-01), Shiomi
patent: 4701048 (1987-10-01), Tokuda et al.

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