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Optical Engineering

Sub-Nyquist interferometry: implementation and measurement capability
Author(s): John E. Greivenkamp; Andrew E. Lowman; Russell J. Palum
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Paper Abstract

Sub-Nyquist interferometry (SNI) provides a method for measuring wavefronts with large departures from a reference sphere, such as those encountered when testing steep aspheric surfaces. SNI allows wavefronts with several hundred waves of departure to be recorded and analyzed. The theory of SNI is reviewed, its experimental implementation described, and limitations in the hardware and potential improvements are discussed. The importance of calibrating the interferometer for non-null testing is demonstrated.

Paper Details

Date Published: 1 October 1996
PDF: 8 pages
Opt. Eng. 35(10) doi: 10.1117/1.600991
Published in: Optical Engineering Volume 35, Issue 10
Show Author Affiliations
John E. Greivenkamp, Univ. of Arizona (United States)
Andrew E. Lowman, Optical Sciences Ctr./Univ. of Arizona (United States)
Russell J. Palum, Eastman Kodak Co. (United States)

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