Patent ID: 8953258
Filing Date: 2015-02-10
Classification: G02B

Abstract:
1. An imaging lens comprising a first lens element, a second lens element, an aperture stop, a third lens element, a fourth lens element and a fifth 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 and said fifth lens element having an object-side surface facing toward the object side and an image-side surface facing toward the image side, wherein: said first lens element has a negative refractive power; said object-side surface of said second lens element has a convex portion in a vicinity of the optical axis; said image-side surface of said third lens element has a convex portion in a vicinity of the optical axis; said image-side surface of said fourth lens element has a convex portion in a vicinity of the optical axis; said fifth lens element is made of a plastic material; said imaging lens satisfies AAG/CT1≦5.500, where AAG represents a sum of a distance between said image-side surface of said first lens element and said object-side surface of said second lens element at the optical axis, a distance between said image-side surface of said second lens element and said object-side surface of said third lens element at the optical axis, a distance between said image-side surface of said third lens element and said object-side surface of said fourth lens element at the optical axis, and a distance between said image-side surface of said fourth lens element and said object-side surface of said fifth lens element at the optical axis; and CT1 represents a distance between said object-side surface and said image-side surface of said first lens element at the optical axis; and 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 and said fifth lens element.