Fiber optic proximity sensor with feedback servo imaging means

Details Fiber optic proximity sensor with feedback servo imaging means Fiber optic proximity sensor with feedback servo imaging means

1986-01-29

1987-09-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250561, H01J 516, H01J 4014

Patent

active

046926119

ABSTRACT:
A proximity sensor is disclosed having two bifurcate fiber optical bundles arranged in parallel. Light is directed at a target by the bundles and the reflected light from the target is transmitted to two separate sensors. The output difference of the sensors is used to derive a control signal for tracking a target. The control signal has a null point and is used in a servo loop to keep the bundles at a constant distance from the target.

REFERENCES:
patent: 3967108 (1976-06-01), Hollis
patent: 4070116 (1978-01-01), Frosch et al.
patent: 4249076 (1981-02-01), Bergstrom et al.
patent: 4289959 (1981-09-01), Takayama et al.
patent: 4460989 (1984-07-01), Russell
patent: 4492860 (1985-01-01), Brogardh et al.
patent: 4567362 (1986-01-01), Kunz
patent: 4596925 (1986-06-01), Gilby

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