Ronchi test and a new phase reduction algorithm

Details Ronchi test and a new phase reduction algorithm Ronchi test and a new phase reduction algorithm

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apopt..29.3255w&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 29, Aug. 1, 1990, p. 3255-3265.

Physics

Optics

5

Aberration, Astigmatism, Gratings (Spectra), Phase Control, Ronchi Test, Algorithms, Concavity, Diffraction Patterns, Interferometry, Phase Switching Interferometers

Scientific paper

A new phase reduction algorithm, originally designed for interferometry test of large optics, is presented for the Ronchi test. Due to the common path property, only two Ronchigrams shifted by pi/2 are necessary for the reproducing phase. Accuracy can be better than one-thirtieth of the grating space. Methods are suggested for finding spherical aberration and astigmatism without integrating the phase using the Ronchi test. Tests of results using the new algorithm show good agreement with typical interferometry tests.

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