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New Ultra-High Sensitivity, Absolute, Linear, and Rotary EncodersSeveral 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 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 sensitivity of 10 nm.
Document ID
19990094291
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Leviton, Douglas B.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1998
Subject Category
Optics
Meeting Information
Meeting: Cryogenic Optical Systems and Instruments
Location: San Diego, CA
Country: United States
Start Date: July 19, 1998
End Date: July 24, 1998
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Other

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