Horus Technology

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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