last update 1/18/2000

Interferometry:

3-dimensional surface and deflection measurement using

interferometric light or stripe light projection.

Phase Shift Technique, Pseudo Phase Shift, Fourier Technique,

Moiré Technique, Gray Code Sequence, Projected Grid Method,

Correlation and Triangulation Techniques.

 

Information on many interferometric methods can be downloaded here:

• Survey on interferometry methods (1M)

 

Example for Fourier Technique:

 

	Projected stripes on flat plate with defects
	Phase image (modulo 2*PI) after assymmetric high pass filtering
	"BIAS" image, i.e. the 2*PI steps after unwrapping the phase image
	Surface elevation coded in gray levels by superimposing phase image and "BIAS" image
	Reconstructed 3-dimensional surface

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Copyright © 2000 The FIBUS Research Institute, Dr. Reinert H. G. Mueller;