Quantitative three-beam Ronchi test.

Details Quantitative three-beam Ronchi test. Quantitative three-beam Ronchi test.

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apopt..29.1912j&link_type=abstract

Applied Optics, Vol. 29, No. 13, p. 1912 - 1918

Physics

Optics

1

Gratings: Optical Testing

Scientific paper

Sinusoidal gratings made by either the spatial filtering method or holography are used in a Ronchi setup to test lenses and mirrors. The interference between the strong zero-order and two weak first-order wavefronts gives a three-beam Ronchigram in which elliptically shaped moire fringes appear. The ellipses may be used to determine quantitatively the primary aberration, such as the coefficient of spherical aberration, coma, or astigmatism.

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