Patent ID: 11932043
Assignee: KARMIC SÀRL
Field: Other consumer goods (Other fields)
Classification: CPC B  G | IPC B  G

Claim 4:
5. The device according to claim 1 where the functions θ(s) in each of said zones are arc tangent functions described by:

θ(s);sst≤s≤se  (1)

θ−θ0=B tan−1[k(s−s0)]  (2)

where:
sst is the start of the range of the values in the dimension s for the whole of said zones and microstructures,
se is the end of the range of the values in the dimension s for the whole of the said zones and microstructures,
and θ0 and s0 are the respective median values of θ and of s in the said range,
and wherein the azimuthal planar angle θ as a function of s of the microstructures constituted in subset arrangement, associated with each of the zones respectively, is different for each zone, and defined by different variables B and k such that:, B
     =
     
      
       2
       ⁢
       
        (
        
         
          θ
          c
         
         -
         
          θ
          0
         
        
        )
       
      
      π
     
    
   
   
    
     (
     3
     )
    
   
  
 

 and

 
  
   
    
     k
     =
     
      
       1
       
        (
        
         
          s
          
           s
           ⁢
           t
          
         
         -
         
          s
          0
         
        
        )
       
      
      ⁢
      
       tan
       [
       
        
         
          θ
          st
         
         -
         
          θ
          0
         
        
        B
       
       ]
      
     
    
   
   
    
     (
     4
     )
    
   
  
 

where αc is an asymptotic value of θ when s→∞ or s→−∞.