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Proceedings Paper

New ultrahigh-sensitivity absolute, linear, and rotary encoders
Author(s): Douglas B. Leviton
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Paper Abstract

Several new types of absolute optical encoders of both rotary and linear function are discussed. The means for encoding are complete departures from conventional optical encoders and offer advantages of reliability, compact form, immunity to damage-induced dropouts of position information, and about an order of magnitude higher sensitivity over what is commercially available. Rotary versions have sensitivity from 0.02 arcseconds down to 0.003 arcsecond while linear models have demonstrated sensitivity of 10 nm (0.01 micrometers ) with higher sensitivities possible.

Paper Details

Date Published: 13 October 1998
PDF: 12 pages
Proc. SPIE 3440, Photonics for Space Environments VI, (13 October 1998); doi: 10.1117/12.326695
Show Author Affiliations
Douglas B. Leviton, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 3440:
Photonics for Space Environments VI
Edward W. Taylor, Editor(s)

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