Fiber optic extender apparatus in a position servo loop

Details Fiber optic extender apparatus in a position servo loop Fiber optic extender apparatus in a position servo loop

1986-01-29

1987-09-15

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250201, G01J 120

Patent

active

046941606

ABSTRACT:
A proximity sensor is disclosed having two bifurcate fiber optical bundles arranged in series. Light is directed at a target by the bundles and the reflected light from the target is transmitted to two different sensors. The output of the sensors is used to derive a differential control signal for tracking a target. One of the sensors picks up reflected light from the fibers which also transmit light to the target while the second sensor detects light from receiver fibers disposed around said transmitter fibers.

REFERENCES:
patent: 3503116 (1970-03-01), Strack
patent: 4070116 (1978-01-01), Frosch et al.
patent: 4163148 (1979-07-01), Fritsche et al.
patent: 4492860 (1985-01-01), Brogardh et al.

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