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Proceedings Paper

Two Computer-Aided Methods For Data Reduction From Interferograms
Author(s): Wolfgang Osten; Roland Hofling; Jurgen Saedler
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Paper 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.

Paper Details

Date Published: 1 June 1988
PDF: 9 pages
Proc. SPIE 0863, Industrial Optoelectronic Measurement Systems Using Coherent Light, (1 June 1988); doi: 10.1117/12.943493
Show Author Affiliations
Wolfgang Osten, Central Institute of Cybernetics and Informatior (Germany)
Roland Hofling, Institute of Mechanics (Germany)
Jurgen Saedler, Central Institute of Cybernetics and Information (Germany)


Published in SPIE Proceedings Vol. 0863:
Industrial Optoelectronic Measurement Systems Using Coherent Light
William F. Fagan, Editor(s)

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