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Proceedings Paper

A 26-Bit Absolute Encoder System
Author(s): David J. Barlow; Bobby L. Ulich; David W. Latham
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Paper Abstract

In October, 1985, new encoder readout electronics were installed on the MMT to read the existing absolute encoders. With the new electronics, the angular resolution of the encoder system has been increased from 24 bits (0.077 arcseconds) to 26 bits (0.019 arcseconds) and the amplitudes of the raw uncorrected errors related to the period of the InductosynsTM* have been reduced from a few arcseconds to the order of +/- 0.5 arcseconds or better.

Paper Details

Date Published: 20 August 1986
PDF: 7 pages
Proc. SPIE 0628, Advanced Technology Optical Telescopes III, (20 August 1986); doi: 10.1117/12.963505
Show Author Affiliations
David J. Barlow, University of Arizona (United States)
Bobby L. Ulich, University of Arizona (United States)
David W. Latham, Smithsonian Astrophysical Observatory (United States)


Published in SPIE Proceedings Vol. 0628:
Advanced Technology Optical Telescopes III
Lawrence D. Barr, Editor(s)

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