Optical encoder using time domain and wavelength multiplexing

Details Optical encoder using time domain and wavelength multiplexing Optical encoder using time domain and wavelength multiplexing

1983-12-27

1985-10-08

Griffin, Robert L.

Multiplex communications

Wide area network

Packet switching

370 4, 455612, H04B 900

Patent

active

045464669

ABSTRACT:
In a position measurement system having a plurality of redundant pulsed light sources, detectors, control circuits, signal conditioning circuits, and signal processors, but having space available for only a single encoder for measuring the position of a monitored device, the pulsed light sources emitting light of different wavelengths which are combined in wavelength multiplexed fashion at the encoder, the combined light then being split for encoding and recombining in time domain multiplexed fashion, the recombined light then being split for filtering of the different wavelengths at the plurality of light detectors each of which provide signal manifestations indicative of the position of the monitored device according to the encoded light pulses of the particular wavelength monitored to the associated control and signal conditioning circuits for transmittal to an associated signal processor.

REFERENCES:
patent: 3521068 (1970-07-01), Armstrong
Kurzweil, F., Jr., "Optical Digital-Analog Detector" IBM Technical Disclosure Bulletin, vol. 11, No. 5, Oct. 1968.

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