Automatic Fringe Pattern Analysis For Holographic Measurement Of Transient Event

M Kujawinska; D W Robinson

doi:10.1117/12.950232

31 March 1989 Automatic Fringe Pattern Analysis For Holographic Measurement Of Transient Event

M Kujawinska, D W Robinson

Proceedings Volume 1026, Holography Techniques and Applications; (1989) https://doi.org/10.1117/12.950232
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

Abstract

A modified optical system and computer image processing software is presented, to automate the analysis of holographic fringe patterns for applications in measurement of transient events is presented. Two fringe pattern analysis techniques are considered; a phase stepped method and a 2-D Fourier transform method. Both of them rely on spatial separation of phase information, although they are based on different physical principles. In the phase stepped method a grating is introduced into the holographic interferometer to separate three phase shifted images into the spatial domain instead of the time domain. In the Fourier transform method a spatial heterodyning frequency is added to the interferogram to isolate phase information in the spatial frequency domain. A comparison between the two methods is given, together with several refinements.

Citation Download Citation

M Kujawinska and D W Robinson "Automatic Fringe Pattern Analysis For Holographic Measurement Of Transient Event", Proc. SPIE 1026, Holography Techniques and Applications, (31 March 1989); https://doi.org/10.1117/12.950232

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