Two Computer-Aided Methods For Data Reduction From Interferograms

Wolfgang Osten; Roland Hofling; Jurgen Saedler

doi:10.1117/12.943493

1 June 1988 Two Computer-Aided Methods For Data Reduction From Interferograms

Wolfgang Osten, Roland Hofling, Jurgen Saedler

Proceedings Volume 0863, Industrial Optoelectronic Measurement Systems Using Coherent Light; (1988) https://doi.org/10.1117/12.943493
Event: 1987 Symposium on the Technologies for Optoelectronics, 1987, Cannes, France

Abstract

There are various methods for the data reduction from interferograms. At present the fringe method and the phase-shifting method are widely used. In the fringe method a skeleton of the fringe pattern is derived automatically and the phase distribution and the dis-placement field, respectively, is evaluated interactively from that skeleton. In the phase-shifting method a set of phase-shifted interferograms is used for the calculation of a relative phase at any point of the object under test. Both methods are implemented on a commercial image processing system, including a video processor, that enables to process images at video rate. Due to some practical experiences in holographic and speckle-inter-ferometry the advantages and disadvantages of both methods are discussed and their ranges of application are considered.

Citation Download Citation

Wolfgang Osten, Roland Hofling, and Jurgen Saedler "Two Computer-Aided Methods For Data Reduction From Interferograms", Proc. SPIE 0863, Industrial Optoelectronic Measurement Systems Using Coherent Light, (1 June 1988); https://doi.org/10.1117/12.943493

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