Patent ID: 9658432
Date: 2017-05-23
CPC Classifications: G02B

Claim:
1. An imaging lens comprising, in an ordered way from an object side to an image side: a first lens having positive (+) refractive power and a convex surface on an object side thereof; and a concave surface on an image side thereof; a second lens having negative (−) refractive power; a third lens having positive (+) refractive power in a meniscus shape and a convex surface on an image side thereof; and a fourth lens having negative (−) refractive power in a meniscus shape and a concave surface on an image side thereof; wherein the third lens is thicker than each of the first, second, and fourth lenses, and wherein the imaging lens satisfies formulae (1) to (2): where, R3 represents a radius of curvature in an optical axis for the third lens to an object side surface, R7 represents a radius of curvature in an optical axis for the third lens to an image side surface, and R4 represents a radius of curvature in an optical axis for the fourth lens to an object side surface.