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Proceedings Paper

Measurement Of Two-Dimensional Optical System Modulation Transfer Function (MTF) By Computation Of Second Order Speckle Statistics
Author(s): G. Lund; M. Azouit
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Paper 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.

Paper Details

Date Published: 25 December 1979
PDF: 8 pages
Proc. SPIE 0192, Interferometry, (25 December 1979); doi: 10.1117/12.957852
Show Author Affiliations
G. Lund, Departement d'Astrophysique de I.I.M.S.P. (France)
M. Azouit, Departement d'Astrophysique de I'I.M.S.P. (France)


Published in SPIE Proceedings Vol. 0192:
Interferometry
George W. Hopkins, Editor(s)

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