A multiple-beam interferometer that permits evaluation of autostigmatic systems is described. A small reference sphere is compared with a spherical wavefront in a manner analogous to the comparison of a plane wavefront with the reference flat in a Fizeau interferometer. To prevent walk-off of the fringes, a field lens is used at the center of curvature of the reference sphere. The instrument described has been used for evaluating spherical mirrors, concentric windows, and lenses.
© 1967 Optical Society of America
Original Manuscript: May 2, 1967
Published: November 1, 1967
L. R. Heintze, H. D. Polster, and J. Vrabel, "A Multiple-Beam Interferometer for Use with Spherical Wavefronts," Appl. Opt. 6, 1924-1929 (1967)