Jpn. J. Appl. Phys. 14 (1975) Supplement 14-1 pp. 351-356 |Previous Article| |Next Article| |Table of Contents|
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ICO Conf. Optical Methods in Scientific and Industrial; Measurements, Tokyo, 1974
Theory and Application of Point-Diffraction Interferometers
Astronomy Research Facility, University of Massachusetts, Amherst 01002, U.S.A.
1National Measurement Laboratory, CSIRO, Sydney 2008, Australia
The point-diffraction interferometer is an interferometer for measuring phase variations in which the reference wave is produced by a point discontinuity in the path of the beam. Its simplicity makes it very suitable for testing instruments in situ, and some such tests are described. The general theory shows that other diffracting apertures can be used and relates the technique to phase-contrast microscopy and to scatter-plate interferometry.