Patent ID: 11869181
Assignee: FUJIFILM CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  C | IPC C  G

Claim 0:
1. A determination method comprising:
generating a phase difference image of an aggregate of a plurality of cells from a hologram obtained by imaging the aggregate;
deriving a first index value that indicates a randomness of an array of a phase difference amount in a plurality of pixels constituting the phase difference image; and
determining a state of the cells constituting the aggregate on the basis of the first index value,
wherein in a case where a minimum value of a phase difference amount in a predetermined range in a plurality of pixels constituting the phase difference image is denoted by Φ0 and a maximum value thereof is denoted by ΦN, a peripheral length of an equiphase line in a random phase Φ in the predetermined range is denoted by L (Φ), and an area of a region surrounded by an equiphase line having the peripheral length L (Φ) is denoted by A (Φ), an average phase fluctuation λ defined by the following Equation (I) is used as the first index value, λ
     =
     
      
       1
       
        
         Φ
         N
        
        -
        
         Φ
         0
        
       
      
      ⁢
      
       
        ∫
        
         Φ
         0
        
        
         Φ
         N
        
       
       
        
         
          
           L
           ⁡
           (
           Φ
           )
          
          2
         
         
          4
          ⁢
          π
          ⁢
          
           A
           ⁡
           (
           Φ
           )
          
         
        
        ⁢
        d
        ⁢
        
         Φ
         .
        
       
      
     
    
   
   
    
     (
     I
     )