Patent ID: 8542448
Filing Date: 2013-09-24
Classification: G02B,H04N

Abstract:
1. An imaging lens comprising: in order from an object side, a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a concave surface on an image side near an optical axis thereof and having a positive refractive power; a fourth lens having a positive refractive power near the optical axis thereof; and a fifth lens having a negative refractive power near the optical axis thereof, wherein an image side surface of the fifth lens is concave near the optical axis and has a region where a negative power of the region decreases toward a periphery of the fifth lens as compared with a negative power near the optical axis, wherein the following conditional expression is further satisfied: wherein vd 2 is an Abbe number of the second lens at the d-line.