Multi-point range finding device

Details Multi-point range finding device Multi-point range finding device

1992-04-01

1993-07-20

Adams, Russell E.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 1, G03B 1336

Patent

active

052298060

ABSTRACT:
In the multi point range finding device according to this invention, the photosensitive means 11 for detecting the light reflected from the subject (3) incudes the PSDs (20a) to (20c) which are disposed at positions and intervals corresponding to plural light-irradiating sources (4a to 4c), and the semiconductor resistance elements (21a to 21c), each of the PSDs (20a to 20c) and each of the semiconductor resistance elements (21a to 21c) are connected in series to each other, and a set of the PSDs (20a to 20c) as well as a set of the semiconductor resistance elements 21a to 21c are connected in parallel with one another. The photoelectric currents generated in the PSDs (20a to 20c) are outputted through common output electrodes E1 and E2. With this structure, a compact multipoint range finding device having high precision can be produced in low cost.

REFERENCES:
patent: 4542971 (1985-09-01), Numata
patent: 4601574 (1986-07-01), Yamane et al.
patent: 4764786 (1988-08-01), Tamura et al.
patent: 4849781 (1989-07-01), Nakazawa et al.
patent: 4938588 (1990-07-01), Taniguchi
patent: 5051766 (1991-09-01), Nonaka et al.

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