Physics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236..777k&link_type=abstract
IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 2 (A91-23201 08-89
Physics
Position Errors, Reflecting Telescopes, Rollers, Sliding Friction, Software Tools, Tracking (Position), Alignment, Antifriction Bearings, Charge Coupled Devices, Synchronous Satellites
Scientific paper
Instrumentation and procedures developed for the study of friction-roller slippage in off-axis couplings of telescope position encoders are presented, and the designs of rollers and their mountings are examined with a view to the characterization of adjustment techniques yielding optimal alignment of the rollers to minimize slippage. Attention is given to the use of various types of fiducials, including GEO satellites and inexpensive optoelectronic sensors, to gather measures of both telescope-position encoder repeatability and telescope hysteresis which are independent of the telescope-pointing model.
Allen Steve
Kibrick Robert
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