Holographic moire patterns processed by the Fourier transform method

Eli S. Simova; Krassimir Nedialkov Stoev

doi:10.1117/12.140464

2 March 1993 Holographic moire patterns processed by the Fourier transform method

Eli S. Simova, Krassimir Nedialkov Stoev

Proceedings Volume 1732, Holographics International '92; (1993) https://doi.org/10.1117/12.140464
Event: Holographics International '92, 1992, London, United Kingdom

Abstract

Spatial-carrier fringe pattern analysis is a wide-spread technique and has found a lot of applications to optical metrology. Introducing a spatial-carrier into a holographic moire pattern is also a well-known technique to obtain observable moire fringes. Preprocessing of the holographic moire pattern includes optical or digital Fourier filtering to remove the carrier. The fringe pattern is then processed by using time-consuming fringe-counting algorithms. The current work presents a new application of the Fourier transform method to automated analysis of holographic moire fringe patterns. The method owns the advantage of instantaneous determination of both phase functions in the pattern. Investigations are carried out on the frequency restrictions imposed on the phase functions. The technique is demonstrated on computer generated noisy holographic moire patterns. The technique does not complicate the conventional experimental holographic moire arrangement.

Citation Download Citation

Eli S. Simova and Krassimir Nedialkov Stoev "Holographic moire patterns processed by the Fourier transform method", Proc. SPIE 1732, Holographics International '92, (2 March 1993); https://doi.org/10.1117/12.140464

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