Solving the out-of-focus OTF reduction using a phase only filter and fuzzy logic reasoning

Zeev Zalevsky; Eran Gur; Dina Elkind; David Mendlovic

doi:10.1117/12.531040

19 November 2003 Solving the out-of-focus OTF reduction using a phase only filter and fuzzy logic reasoning

Zeev Zalevsky, Eran Gur, Dina Elkind, David Mendlovic

Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.531040
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

Abstract

The problem of frequency response degradation while stepping out of the focal plane of an optical setup is well known. In this work the authors suggest a novel method for decreasing this effect. The main principle is to assign different weights to different out-of-focus planes and design a phase only filter for each plane, then combining the filters with respect to the weights. The weights of the different planes increase as the distance from the focal plane increases and the exact weights are determined by a fuzzy logic inference engine. The fuzzy logic tool grades the different weighing sets according to the average width of the optical transfer functions and according to the deviation between function's widths.

Citation Download Citation

Zeev Zalevsky, Eran Gur, Dina Elkind, and David Mendlovic "Solving the out-of-focus OTF reduction using a phase only filter and fuzzy logic reasoning", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.531040

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