Optoelectronic shaft-angle encoder measures angle of rotation of shaft with high precision while minimizing effects of eccentricity and other misalignments. Grooves on disk serve as reference marks to locate reading heads and measure increments of rotation of disk. Shaft-angle encoder, resembling optical compact-disk drive, includes two tracking heads illuminating grooves on disk and measures reflections from them.
Optoelectronic Shaft-Angle Encoder Tolerates Misalignments
NASA Tech Briefs ; 15 , 4
1991-04-01
Miscellaneous
No indication
English
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