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

Claim 0:
1. An optical imaging lens, disposed sequentially from an object side to an image side, comprising first, second, third, fourth, fifth, and sixth lens elements, each of said lens elements having an object-side surface facing toward said object side and an image-side surface facing toward said image side, wherein:
said image-side surface of said first lens element comprises a concave portion in a vicinity of an optical axis;
said fifth lens element has negative refractive power;
said image-side surface of said sixth lens element comprises a concave portion in a vicinity of an optical axis; and
said optical imaging lens as a whole has only the six lens elements,
wherein the sum of the thickness of all six lens elements along the optical axis is defined as ALT, a central thickness of said sixth lens element along the optical axis is CT6, and ALT and CT6 satisfy the equation:, 5.5
  ≤
  
   
    
     A
     ⁢
     L
     ⁢
     T
    
    
     C
     ⁢
     T
     ⁢
     6
    
   
   .