31 October 2016 The influence of diffraction gratings relief distortion on diffraction efficiency during authentication security holograms
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Abstract
The method of security hologram quality inspection, in which the relief phase parameters are determined by registering results of the intensity distribution in diffraction orders, is known. The profile of relief as a harmonious distribution is represented. Distortion of the ideal relief profile, another words phase relief noise, influence on the accuracy of this method. In the paper, on the assumption of homogeneity of the phase relief noise, the mathematical expressions for evaluating the influence of the phase relief noise on the intensity distribution in the diffraction orders are represented. Parameters of the correlation functions approximation describing the phase relief noise are determined. The dependence of the intensity values from the standard deviation of the phase relief noise is represented.
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V. V. Kolyuchkin, S. B. Odinokov, I. K. Tsyganov, "The influence of diffraction gratings relief distortion on diffraction efficiency during authentication security holograms", Proc. SPIE 10022, Holography, Diffractive Optics, and Applications VII, 100221M (31 October 2016); doi: 10.1117/12.2246097; https://doi.org/10.1117/12.2246097
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