Patent ID: 9632284
Date: 2017-04-25
CPC Classifications: G02B

Claim:
1. An optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising 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 second lens element comprises a concave portion in a vicinity of said optical axis; said third lens element has positive refracting power; 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 object-side surface of said fourth lens element comprises 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 concave portion in a vicinity of said optical axis; said image-side surface of said fifth 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 fifth lens element; said optical imaging lens comprises no other lenses having refracting power beyond said first, second, third, fourth, and fifth lens elements; and a distance between said object-side surface of said first lens element and an image plane along said optical axis is represented by TTL, a central thickness of said fifth lens element is represented by T5, TTL and T5 satisfy the equation: TTL/T5≦10.0.