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- W2159264005 abstract "The testing of spherical surfaces using the three-measurement technique outlined by Jensen requires very precise alignment of the sphere relative to the interferometer. An easier technique for the absolute measurement of spherical surfaces has been developed which does not require the precise alignment of the Jensen technique and uses only two measurements. As long as the test surface does not contain any aberrations with odd symmetry, these aberrations can be subtracted from the measurement and an absolute measurement of the test surface can be obtained. This paper describes and compares these two techniques and shows results of testing a A112 P-V (jeak-to-valley) sphere (N.A.=0.4) using both techniques with a phase-measuring Fizeau interferometer. These measurement techniques are repeatable to waves PV." @default.
- W2159264005 created "2016-06-24" @default.
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- W2159264005 date "1991-01-01" @default.
- W2159264005 modified "2023-09-23" @default.
- W2159264005 title "Absolute measurement of spherical surfaces" @default.
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- W2159264005 doi "https://doi.org/10.1117/12.51045" @default.
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