Electro-optical angular displacement

Details Electro-optical angular displacement Electro-optical angular displacement

1981-04-21

1984-02-07

Nelms, David C

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250227, G01D 534

Patent

active

044305664

ABSTRACT:
An electro-optical angular displacement transducer incorporates a pair of encoding disks to produce a varying moire interference pattern sensitive to angular displacement of one disk relative to the other. The disks are illuminated by a fiber optic bundle over substantially a full 360 degree annulus concentric with the disks. A similar fiber optic bundle is used to collect the light transmitted through the disks and supply it to a detector.

REFERENCES:
patent: 3495452 (1970-02-01), Johnson et al.
patent: 3875406 (1975-04-01), Holeman
patent: 3906220 (1975-09-01), Delingat
patent: 4240066 (1980-12-01), Lenox
patent: 4264897 (1981-04-01), Farnsworth

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