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Horus® is the first instrument based on MS-DWS
MultiSpeckle Diffusing Wave Spectroscopy, an extension of
classical Dynamic Light Scattering to concentrated and opaque media.
MS-DWS set-up :

Speckle image
 
Particles, droplets, fibers ...
Thin layer sample
any thickness
Fluid sample => moving scatterers => Deformation of speckle pattern




Measurement principle

Formulaction has developed its own data processing dedicated to film formation monitoring :
the patented technology : Adaptive Speckle Imaging Interferometry.
  Film-forming sample
Detected signal from backscattered waves
  
   
 
Time  
 
 
 
Motion of sample microstructure = Deformation speed of speckle pattern = Speckle rate
       




Measurement principle (2)

A.S.I.I. technology is a patented data processing allowing an accurate determination of
the speckle rate as a function of time and the real-time display of the film-formation kinetics.
Kinetics of film formation
 
 

   
     
   
     

 

Speckle rate = Motion of sample microstructure








Adaptive processing

ASII main strength is ADAPTIVITY: acquisition duration of speckle images is continually optimised to achieve the best measurement of fast and slow microstructure motions, ensuring accuracy and responsiveness



Speckle rate = 1/decorrelation time of speckle images




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31240 l'Union (near Toulouse)  France
Ph: +33 (0) 5 62 89 29 29         Fax: +33 (0) 5 62 89 29 20
E-mail : contact@formulaction.com 
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