Patent ID: 9703074
Date: 2017-07-11
CPC Classifications: G02B

Claim:
1. An optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising a first lens element, a second lens element, a third lens element, an aperture stop, a fourth lens element, a fifth lens element and a sixth lens element, each of said first, second, third, fourth, fifth and sixth lens elements having refracting power, an object-side surface facing toward the object side and an image-side surface facing toward the image side and a central thickness defined along the optical axis, wherein: said object-side surface of said first lens element comprises a convex portion in a vicinity of the optical axis; said object-side surface of said second lens element comprises a convex portion in a vicinity of the optical axis; said image-side surface of said fourth lens element comprises a convex portion in a vicinity of a periphery of the fourth lens element; said object-side surface of said fifth lens element comprises a convex portion in a vicinity of a periphery of the fifth lens element; said object-side surface of said sixth lens element comprises a concave portion in a vicinity of the optical axis; said optical imaging lens comprises no other lenses having refracting power beyond the six lens elements; and the central thickness of the second lens element along the optical axis is CT2, the central thickness of the third lens element along the optical axis is CT3, an air gap between the third lens element and the fourth lens element along the optical axis is AC34, and CT2, CT3 and AC34 satisfy the equation: wherein a sum of the thickness of all six lens elements along the optical axis is ALT, and CT3 and ALT satisfy the equation: