Absolute testing of rotationally symmetric surfaces with computer-generated holograms.
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DOI: 10.1364/oe.532975
Abstract: Extremely high accuracy is demanded for optics working at very short wavelength. Interferometric testing of optical aspheres or freeform surfaces requires null optics, typically computer-generated holograms (CGHs), to balance the wave aberrations. The measurement uncertainty… read more here.
Keywords: absolute testing; generated holograms; optics; computer generated ... See more keywords
Absolute testing of optical flats using minimum norm least squares solutions.
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DOI: 10.1364/oe.534407
Abstract: A laser Fizeau interferometer measures surface form by comparing the wavefronts reflected from a reference surface and the surface under test. The measurement accuracy is limited by the unknown absolute form error of the reference… read more here.
Keywords: absolute testing; norm least; using minimum; least squares ... See more keywords