Rheolaser Crystal uses the Diffusing Wave Spectroscopy principle (DWS). Light is scattered by the particles, creating an interference pattern (Speckle Image). The variation of this image is directly related to the motion of the particles: the faster they move, the faster the Speckle Image changes. By a mathematical analysis of this variation,decorrelation functions can be computed and then processed, to obtain a characteristic time τ, as a function of time or temperature.
Values of 1/τ, or Micro-Dynamics (Hz), are then plotted against time or temperature, resulting in characteristic peaks when the product shows a microstructural evolution, such as a phase transition or any other physical event. The signal can then be integrated for an easier visualisation, obtaining the so-called Micro-Dynamics Evolution (%).
A VERSATILE DEVICE
Any sample can be analysed, no matter its form (liquid, solid, gel…) or the volume available (from 0.05g for precious
products, to 5g for heterogeneous samples). Use the instrument for complex mixtures and blending compatibility studies.
CHARACTERISE YOUR SAMPLE AS IT IS
Thanks to the non-intrusive measurement, and to the large and direct sampling, there is absolutely no risk to damage the
structure of the sample, or to obtain non-representative data because of heterogeneities. Rheolaser Crystal will just measure your whole sample.
FAST & ACCURATE ANALYSIS
Analysis can be launched in just 1-click, after direct sampling of the product. The optical DWS principle, enabling sensitivity at the nanometer size, combined to a very accurate temperature control, makes Rheolaser Crystal the fastest and most accurate way to monitor microstructure evolution.