New ultrahigh-sensitivity absolute, linear, and rotary encoders

Douglas B. Leviton

doi:10.1117/12.326695

13 October 1998 New ultrahigh-sensitivity absolute, linear, and rotary encoders

Douglas B. Leviton

Proceedings Volume 3440, Photonics for Space Environments VI; (1998) https://doi.org/10.1117/12.326695
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

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.

Citation Download Citation

Douglas B. Leviton "New ultrahigh-sensitivity absolute, linear, and rotary encoders", Proc. SPIE 3440, Photonics for Space Environments VI, (13 October 1998); https://doi.org/10.1117/12.326695

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