1 October 1996 Sub-Nyquist interferometry: implementation and measurement capability
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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.
John E. Greivenkamp, Andrew E. Lowman, Russell J. Palum, "Sub-Nyquist interferometry: implementation and measurement capability," Optical Engineering 35(10), (1 October 1996). https://doi.org/10.1117/1.600991
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