Distance measuring device with plural differing reference voltag

Details Distance measuring device with plural differing reference voltag Distance measuring device with plural differing reference voltag

1988-10-12

1990-12-11

Tarcza, Thomas H.

Optics: measuring and testing

Range or remote distance finding

With photodetection

2502016, 354403, 356 4, G01C 300

Patent

active

049765370

ABSTRACT:
A distance measuring device is provided with a plurality of comparators which are respectively connected to a plurality of light receiving elements for receiving light reflected from a subject. The plurality of comparators detect the levels of output signals of the light receiving elements. The comparators are supplied with reference voltages to be used for comparison with the output signals, the reference voltages being set different for each comparator according to the distance from whic the respective light receiving element receives light.

REFERENCES:
patent: 3936187 (1976-02-01), Momose
patent: 3951549 (1976-04-01), Fowler et al.
patent: 4077718 (1978-03-01), Graham, Jr. et al.
patent: 4135815 (1979-01-01), Masunaga et al.
patent: 4274735 (1981-06-01), Tamura et al.
patent: 4313654 (1982-02-01), Matsui et al.
patent: 4575211 (1986-03-01), Matsumura et al.
patent: 4575237 (1986-03-01), Suzuki
patent: 4582424 (1986-04-01), Kawabata
patent: 4707128 (1987-11-01), Coles
patent: 4740806 (1986-04-01), Takehana

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