Patent ID: 9348116
Filing Date: 2016-05-24
CPC Classification: G02B

Claim Text:
1. An optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising an aperture stop, first, second, third, fourth, fifth and sixth lens elements, 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: the image-side surface of the first lens comprises a convex portion in a vicinity of the periphery of the first lens element; the second lens element has negative refracting power and the image-side surface thereof comprises a concave portion in a vicinity of the optical axis and a convex portion in a vicinity of the periphery of the second lens element; the third lens element is constructed by plastic material; the object-side surface of the fourth lens element comprises a concave portion in a vicinity of the optical axis; the image-side surface of the fifth lens element comprises a convex portion in a vicinity of the periphery of the fifth lens element; the sixth lens element is constructed by plastic material and the image-side surface thereof comprises a convex portion in a vicinity of the periphery of the sixth lens element; and an air gap between the second lens element and the third lens element along the optical axis is represented by G23, an air gap between the fifth lens element and the sixth lens element along the optical axis is represented by G56, an effective focal length of the optical imaging lens is represented by EFL, the central thickness of the fifth lens element is represented by T5, the central thickness of the first lens element is represented by T1, G23, G56, EFL, T5 and T1 satisfy the equations: the optical imaging lens comprises no other lenses having refracting power beyond the six lens elements.