Patent ID: 11874403
Assignee: INFINEON TECHNOLOGIES AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 29:
30. The ToF measurement device of claim 28, wherein the wherein the control circuitry is configured to control the light source, sensor, and reflectance map generator to measure a distance to the calibration surface for each pixel or group of pixels, and to scale the measured intensity by calculating the scaled measured intensity according to, L
      
        i
        ,
        j
      
    
    =
    
      
        
          
            I
            
              i
              ,
              j
            
          
          ⁡
          
            (
            
              
                d
                ⁢
                
                  
                
                ⁢
                
                  c
                  
                    i
                    ,
                    j
                  
                
              
              
                d
                calib
              
            
            )
          
        
        2
      
      ⁢
      
        (
        
          1
          
            
              cos
              ⁢
              
                β
                
                  i
                  ,
                  j
                
              
            
            )
          
        
        )
      
    
  
  ,, where:
Li,j is the scaled measured intensity for pixel i, j;
Ii,j is the measured intensity for pixel i, j;
dci,j is the measured distance to the calibration surface for pixel i,j;
βi,j is the viewing angle of pixel i, j, with respect to the optical axis of the ToF sensor; and
dcalib is the calibration distance.