Patent ID: 9746640
Date: 2017-08-29
CPC Classifications: G02B

Claim:
1. An optical imaging lens, sequentially from an object side to an image side along an optical axis, said optical imaging lens comprising an aperture stop, and first, second, third, fourth, and fifth lens elements, each of said first, second, third, fourth, and fifth lens elements having refracting power, an object-side surface facing toward said object side and an image-side surface facing toward said image side and a central thickness defined along said optical axis, wherein: said image-side surface of said first lens element comprises a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of said first lens element; said second lens element has negative refracting power, said object-side surface of said second lens element comprises a convex portion in a vicinity of said optical axis and a convex portion in a vicinity of a periphery of said second lens element, said image-side surface of said second lens element comprises a concave portion in a vicinity of a periphery of said second lens element; said object-side surface of said third lens element comprises a convex portion in a vicinity of said optical axis and a concave portion in a vicinity of a periphery of said third lens element; said image-side surface of said third lens element comprises a convex portion in a vicinity of a periphery of said third lens element; said fourth lens element has positive refracting power, said object-side surface of said fourth lens element comprises a concave portion in a vicinity of said optical axis and a concave portion in a vicinity of a periphery of said fourth lens element, said image-side surface of said fourth lens element comprises a convex portion in a vicinity of a periphery of said fourth lens element; said fifth lens element is made by plastic; said optical imaging lens comprises no other lenses having refracting power beyond said first, second, third, fourth, and fifth lens elements, an abbe number of the second lens element is represented by V2, an abbe number of the third lens element is represented by V3, an effective focal length of said optical imaging lens is represented by EFL, a central thickness of said first lens element is represented by T1, a central thickness of said third lens element is represented by T3, an air gap between said fourth lens element and said fifth lens element along said optical axis is represented by G45, V1, V3, EFL, T3, T1, G45 satisfy equations: |V2−V3|≦20, EFL/T3≦13.6, and T1/G45≧2.4.