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Parallel subtraction of Fourier power spectrum using holographic interferometry

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Abstract

We propose and demonstrate parallel subtraction of the Fourier power spectrum of two images with the use of real-time holographic interferometry. The subtraction, which exhibits shift invariance, is achieved by employing a Mach–Zehnder interferometer and a photorefractive crystal. The results are presented and discussed.

© 1992 Optical Society of America

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