Other
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979spie..192..140d&link_type=abstract
In: Interferometry; Proceedings of the Seminar, San Diego, Calif., August 29, 30, 1979. (A80-44308 19-35) Bellingham, Wash., Soc
Other
Asphericity, Interferometers, Mirrors, Optical Measuring Instruments, Complex Systems, Computer Techniques, Design Analysis, Helium-Neon Lasers, Null Zones, Optical Reflection
Scientific paper
The proposed method of testing mirrors with stretched and decentered aspheric surfaces involves the use of phase measuring interferometry and consists of replacing the null lens with a computer-generated reference file containing the equivalent optical path difference data. In the system presented, the range of test asphericity is limited by the requirement of the continuity algorithm that the slope of the phase between any two adjacent detection elements not exceed one fourth of the wavelength. However, the range can be extended by rewriting the continuity algorithm, changing the interferometer configuration, increasing the detection matrix resolution, and by other techniques.
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