Physics – Optics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1235..448v&link_type=abstract
IN: Instrumentation in astronomy VII; Proceedings of the Meeting, Tucson, AZ, Feb. 13-17, 1990 (A91-29601 11-35). Bellingham, WA
Physics
Optics
Attitude Gyros, Fiber Optics, Optical Gyroscopes, Optical Measuring Instruments, Optical Tracking, Telescopes, Angular Velocity, Axes Of Rotation, Performance Tests
Scientific paper
The current state of performance of fiber-optic gyroscopes is discussed in relation to the needs of optical telescopes for tracking and setting. The principles of operation of fiber-optic gyroscopes are outlined, as well as their parameters and practical problems associated with telescope applications, such as fringe-shift measurements. Photon shot noise at the output, drift rate, and scale-factor stability are examined. Telescope configurations for an equatorial and alt-azimuth cases are discussed, along with such astronomical applications as tracking, slewing, static telescope, and field rotation. It is concluded that further improvements the fiber-optic gyroscopes will make an encoder scheme based on these devices competitive with conventionally encoded optical telescopes.
Culshaw Brian
van Breda Ian
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