- Fourier profilometry
Fourier profilometry is a method for measuring profiles using distortions in periodic patterns. The method uses
Fourier analysis (a 2-dimension alFast Fourier transform ) to determine localizedslope s on a curvingsurface .This allows a "x", "y", "z" coordinate system of the surface to be generated from a single image which has been overlaid with the distortion pattern.
It is used specifically in measuring the shape of the human
cornea for use incontact lens design.External links
* [http://www.euclidsys.com/ Euclid Systems] (Emerald lenses)
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