Patent ID: 11965729
Assignee: OMRON CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. The confocal sensor according to claim 6, wherein when the wavelength of the reflected light is represented by λ, the distance from the diffractive lens to the object is represented by L1, the distance from the pinhole to the diffractive lens is represented by L2, and a focal length of the diffractive lens with respect to a reference wavelength λ0 is represented by f0, the non-linear relationship is represented by:, L
          1
        
        =
        
          
            
              
                λ
                0
              
              ⁢
              
                f
                0
              
              ⁢
              
                L
                2
              
            
            
              
                L2
                ⁢
                
                  
                
                ⁢
                λ
              
              -
              
                
                  f
                  0
                
                ⁢
                
                  λ
                  0
                
              
            
          
          .
        
      
    
    
      
        [
        
          Formula
          ⁢
          
            
          
          ⁢
          1
        
        ]