Abstract

A developed form of the Fresnel zone-plate interferometer is described. Three basic configurations are distinguished, associated with the real and virtual first order foci of a zone plate. Related versions and higher order variants are also educed. Compensated phase zone plates used in this application are found to produce uniform amplitude wavefronts. The properties of the interferometer in this form are discussed and an example given of its high-quality performance.

© 1974 Optical Society of America

Testing a zone plate with a grating interferometer

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Method to obtain a clear fringe pattern with a zone-plate interferometer

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