Specular surface inhibit

Details Specular surface inhibit Specular surface inhibit

1988-05-27

1989-08-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356 4, G01V 904

Patent

active

048535320

ABSTRACT:
A proximity detection system which detects the presence of highly specular surfaces which could produce erroneous indications for the system and suppresses them so that they will not affect the system adversely.

REFERENCES:
patent: 3851168 (1974-11-01), Erbstein
patent: 3900261 (1975-08-01), Wingate
patent: 3923395 (1975-12-01), Bodlaj
patent: 3937574 (1976-02-01), Peckham et al.
patent: 4091275 (1978-05-01), Wilwerding
patent: 4180726 (1979-12-01), De Crescent
patent: 4258255 (1981-03-01), Guscott
patent: 4434363 (1984-02-01), Yorifuji et al.
patent: 4590410 (1986-05-01), Jonsson
patent: 4716430 (1987-12-01), Stauffer
patent: 4733081 (1988-03-01), Mizukami
patent: 4788439 (1988-11-01), Hardy et al.

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