Christopher Klein, Paul Venema, Leonard Sagis, Dagmar van Dusschoten, Manfred Wilhelm, Hans Wolfgang Spiess, Erik van der Linden, Salman S. Rogers, Athene M. Donald
Rheo-optical Measurements using Fast Fourier Transform and Oversampling
Appl. Rheol. 17:4 (2007) 45210 (7 pages)

Abstract: Rheo-optics is a method that allows the analysis of optical properties, like birefringence and dichroism under steady and oscillatory shear. It is possible to correlate macroscopic mechanical responses with induced microscopic changes in the material. We describe how this method was improved several fold and implemented on a commercially available setup. However, the here presented ideas are applicable to any rheo-optical setup, based on modulation of the laser light. Additionally it does not need a lock-in amplifier and therefore reduces the costs of the setup. © 2007 Applied Rheology.

DOI 10.3933/ApplRheol-17-45210

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