Single lens rangefinder device having light emitter and detector

Details Single lens rangefinder device having light emitter and detector Single lens rangefinder device having light emitter and detector

1982-12-13

1984-07-17

Gellner, Michael L.

G03B 310

Patent

active

044602596

ABSTRACT:
A simple rangefinder device, suitable for two-zone ranging applications, comprises a single lens, a light emitter located with respect to the lens to produce a beam of light, and a light detector located with respect to the lens to define a field of view. The effective lens aperture for the emitter and the detector substantially coincide and the field of view of the detector overlaps the light beam in a detection region extending away from the lens for a predetermined distance. Signal processing electronics receive a signal produced by the light detector to produce a signal representing the presence or absence of a reflecting object in the detection region.

REFERENCES:
patent: Re27461 (1972-08-01), Harvey
patent: 3631785 (1971-01-01), Perlman et al.
patent: 3635135 (1972-01-01), Ambraschka
patent: 3736057 (1973-05-01), Harvey
patent: 3836919 (1974-09-01), Matsumoto et al.
patent: 4025785 (1977-05-01), Mueller
patent: 4065778 (1977-12-01), Harvey
patent: 4148574 (1979-04-01), Johnson
patent: 4174159 (1979-11-01), Kraft et al.
patent: 4313654 (1982-02-01), Matsui et al.

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