Patent ID: 11903819
Assignee: ALCON INC.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A

Claim 2:
3. The ophthalmic lens of claim 2, wherein Zaux corresponds to the phase shift structure and is described by the following equation:, Z
   aux
  
  =
  
   {
   
    
     
      
       0
       ,
      
     
     
       
     
     
      
       (
       
        0
        ≤
        r
        <
        
         r
         1
        
       
       )
      
     
    
    
     
      
       Δ
       _
      
     
     
      
       
        (
        
         r
         -
         
          r
          1
         
        
        )
       
       ,
      
     
     
      
       (
       
        
         r
         1
        
        ≤
        r
        <
        
         r
         2
        
       
       )
      
     
    
    
     
      
       (
       
        
         r
         2
        
        -
        
         r
         1
        
       
       )
      
     
     
       
     
     
       
     
    
    
     
      
       Δ
       ,
      
     
     
       
     
     
      
       (
       
        
         r
         2
        
        <
        r
       
       )
      
     
    
   
  
 

wherein,
r denotes a radial distance from the optical axis of the optic,
r1 denotes a radial distance from the optical axis to the first boundary;
r2 denotes a radial distance from the optical axis to the second boundary;

and wherein,
Δ is defined by the following relation:, Δ
   =
   
    αλ
    
     (
     
      
       n
       2
      
      -
      
       n
       1
      
     
     )
    
   
  
  ,
 

wherein,
n2 denotes an index of refraction of material forming the optic,
n2 denotes an index of refraction of a medium surrounding the optic,
λ denotes a design wavelength, and
α denotes a non-integer fraction.