Patent ID: 8976467
Filing Date: 2015-03-10
Classification: G02B,H04N

Abstract:
1. An optical imaging lens, sequentially from an object side to an image side, comprises: an aperture stop; and first, second, third and fourth lens elements, each of said first, second, third, and fourth lens elements 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 positive refracting power, said object-side surface thereof comprises a convex portion in a vicinity of the optical axis; said second lens element has negative refracting power, said object-side surface thereof is a convex surface, and said image-side surface thereof comprises a concave portion in a vicinity of the optical axis; said third lens element has positive refracting power; said object-side surface of said fourth lens element comprises a convex portion in a vicinity of the optical axis, and said image-side surface of said fourth lens element comprises a concave portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of the fourth lens element; the optical imaging lens as a whole has refracting power, the sum of the thickness of all four lens elements along the optical axis is ALT, the sum of all three air gaps from the first lens element to the fourth lens element along the optical axis is G a central thickness of the first lens element along the optical axis is T1, a central thickness of the third lens element along the optical axis is T3, a central thickness of the fourth lens element along the optical axis is T4, an air gap between the third lens element and the fourth lens element along the optical axis is G