| 主权项 |
1. An imaging lens comprising an aperture stop, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element arranged in order from an object side to an image side along an optical axis of said imaging lens, each of said first lens element, said second lens element, said third lens element, said fourth lens element, said fifth lens element and said sixth lens element having a refractive power, an object-side surface facing toward the object side, and an image-side surface facing toward the image side, wherein:
said image-side surface of said first lens element has a convex portion in a vicinity of a periphery of said first lens element; said second lens element is made of a plastic material; said image-side surface of said third lens element has a concave portion in a vicinity of a periphery of said third lens element; said image-side surface of said fourth lens element has a convex portion in a vicinity of the optical axis; said image-side surface of said fifth lens element has a concave portion in a vicinity of the optical axis, and a convex portion in a vicinity of a periphery of said fifth lens element; and said image-side surface of said sixth lens element has a concave portion in a vicinity of the optical axis; said imaging lens satisfying ALT/G34≦9.00, where ALT represents a sum of thicknesses of said first lens element, said second lens element, said third lens element, said fourth lens element, said fifth lens element and said sixth lens element at the optical axis, and G34 represents an air gap length between said third lens element and said fourth lens element at the optical axis. |
