Measurement Of Two-Dimensional Optical System Modulation Transfer Function (MTF) By Computation Of Second Order Speckle Statistics

G. Lund; M. Azouit

doi:10.1117/12.957852

25 December 1979 Measurement Of Two-Dimensional Optical System Modulation Transfer Function (MTF) By Computation Of Second Order Speckle Statistics

G. Lund, M. Azouit

Author Affiliations +

Proceedings Volume 0192, Interferometry; (1979) https://doi.org/10.1117/12.957852
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

An interferometric approach to the calculation of the two-dimensional MTF of an optical system is proposed. The technique, in some ways analogous to that of speckle interferometry used in astronomical situations, is based on the computation of the second-order spatio-temporal statistics of a fluctuating speckle pattern. The theorum of Van Cittert-Zernike is invoked to relate the speckle, due to illumination of a perfect diffuser by the point spread function of an optical system, to the two-dimensional MTF of the system. The computed MTF is displayed in the form of a contour map and can also be represented in the conventional form of a one-dimensional vertical cut. Preliminary measurements have yielded qualitatively useful results and clearly illustrate the suitability of two-dimensional maps for the detection of transfer function anisotropies.

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G. Lund and M. Azouit "Measurement Of Two-Dimensional Optical System Modulation Transfer Function (MTF) By Computation Of Second Order Speckle Statistics", Proc. SPIE 0192, Interferometry, (25 December 1979); https://doi.org/10.1117/12.957852

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