Patent ID: 11921263
Assignee: GENIUS ELECTRONIC OPTICAL CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. The optical imaging lens according to claim 15, wherein a central thickness of said second lens element is CT2, a central thickness of said third lens element is CT3, a central thickness of said fourth lens element is CT4, a central thickness of said fifth lens element is CT5, and CT2, CT3, CT4, and CT5 satisfy the equation:, 1
     .
     1
    
    ⁢
    2
    ⁢
    9
   
   ≤
   
    
     
      C
      ⁢
      T
      ⁢
      4
     
     +
     
      C
      ⁢
      T
      ⁢
      5
     
    
    
     
      C
      ⁢
      T
      ⁢
      2
     
     +
     
      C
      ⁢
      T
      ⁢
      3
     
    
   
   ≤
   
    
     2
     .
     5
    
    ⁢
    1
    ⁢
    5
   
  
  .