Abstract:Optical interferometry, especially the lateral Shearing interferometer, has long played a role in wavefront sensing. Phase-Shifting Interferometry and also Self-Referencing Interferometry have significant advantages over the Shack-Hartmann wavefront sensor. Phase difference between two interfering beams is determined by measuring the intensity while the phase difference between the two interfering beams is changed in a known manner three times. The phase difference can then be determined in the presence of abe… Show more
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