Double grating interferometer with large lateral shear.

Details Double grating interferometer with large lateral shear. Double grating interferometer with large lateral shear.

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990optik..84...28l&link_type=abstract

Optik, Vol. 84, No. 1, p. 28 - 32

Physics

Optics

Interferometers: Optical Design

Scientific paper

A doublegrating interferometer capable of determining the spherical aberration of the optics is described. Two Ronchi rulings of 19.69 lines/mm have been used in the setup to generate large shear among the diffracted wavefronts. Three zero-order diffracted wavefronts will then be collected to interfere by means of spatial filtering. The modulation fringes, appeared in the three-beam interferogram, may be used to determine the coefficient of the primary spherical aberration of the optics under test.

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