Patent ID: 9158093
Filing Date: 2015-10-13
Classification: G02B,H04N

Abstract:
1. An imaging lens comprising 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 object-side surface of said first lens element has a convex portion in a vicinity of the optical axis, and said image-side surface of said first lens element has a concave portion in a vicinity of the optical axis; said object-side surface of said second lens element has a convex portion in a vicinity of the optical axis; said object-side surface of said third lens element has a convex portion in a vicinity of the optical axis; said object-side surface of said fifth lens element has a convex portion in a vicinity of a periphery of said fifth lens element, and said image-side surface of said fifth lens element has a convex portion in a vicinity of the optical axis; said image-side surface of said sixth lens element has a concave portion in a vicinity of the optical axis, and said sixth lens element is made of a plastic material; said imaging lens does not include any lens element with refractive power other than 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; and said imaging lens satisfying 1.0≦ALT/G23≦11.5, 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 G23 represents an air gap length between said second lens element and said third lens element at the optical axis.