Digital wavelength division multiplex optical transducer having

Details Digital wavelength division multiplex optical transducer having Digital wavelength division multiplex optical transducer having

1991-06-17

1994-01-25

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022723, 25023118, G01J 350, G01D 534

Patent

active

052818110

ABSTRACT:
A fiber optic optical transducer or encoder is described. The outputs of two detectors receiving signals from an optical multiplexer/demultiplexer arrangement are compared to determine whether a given code bit is "on" or "off". When the bit is "on" the power received by the second detector will, for example, be greater than the power received by a first detector. When the bit is "off" the reverse is true. A simple power level comparison thus determines the logic state of each given code bit.

REFERENCES:
patent: 4223216 (1980-09-01), Quick et al.
patent: 4362358 (1982-12-01), Hafle
patent: 4409476 (1983-10-01), Lofgren et al.
patent: 4857726 (1989-08-01), Kinney et al.
patent: 4947038 (1990-08-01), Wiesmeier et al.
patent: 5004910 (1991-04-01), Arnet

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