Patent ID: 9632283
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 the object side, an image-side surface facing toward the image side and a central thickness defined along the optical axis, wherein: said first lens element has negative refracting power; said object-side surface of said second lens element comprises a convex portion in a vicinity of a periphery of the second lens element and said image surface of said second lens element comprises a concave portion in the vicinity of a periphery of the second lens element; said object-side surface of said third lens element comprises a convex portion in a vicinity of a periphery of the third lens element; said image-side surface of said fifth lens element comprises a convex portion in a vicinity of a periphery of the fifth lens element; the optical imaging lens comprises no other lenses having refracting power beyond the five lens elements; and the central thickness of the second lens element is represented by T an air gap between the third lens element and the fourth lens element along the optical axis is represented by G wherein the central thickness of the third lens element is represented by T