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Proceedings Paper

Influence Of The Non-Linearity Weighting Function On The Vander Lugt Correlation
Author(s): Nazif Demoli
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Paper Abstract

The influence of the non-linearity weighting function of a matched spatial filter (MSF) on the Vander Lugt frequency plane correlation is analysed. A pure correlation of two signals is convolved with the Fourier transformed non-linearity weighting function of the MSF which is due to the non-linear behaviour of the recording media used. The transfer function of the recording material is depicted by the transmittance vs exposure (t - E) curve, which is described by means of the Taylor series expansion and approximated by commonly used polynomials, or by some analytic functions. For investigating the output correlation amplitude distribution, certain analytic approximations of the t E curve appear better suited than others. A tractable model was obtained through the application of the direct method and the transform method analysis of the Taylor series coefficients.

Paper Details

Date Published: 13 December 1983
PDF: 8 pages
Proc. SPIE 0370, Holographic Data Nondestructive Testing, (13 December 1983); doi: 10.1117/12.934907
Show Author Affiliations
Nazif Demoli, Institute of Physics of the University of Zagreb (Yugoslavia)


Published in SPIE Proceedings Vol. 0370:
Holographic Data Nondestructive Testing
Dalibor Vukicevic, Editor(s)

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