Patent ID: 8390941
Filing Date: 2013-03-05
Classification: G02B

Abstract:
1. An imaging lens comprising: in order from an object side thereof, a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a convex surface on an image side near the 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, wherein an object side surface of the first lens is convex toward the object side near the optical axis, an image side surface of the fourth lens is convex toward an image side near the optical axis, the image side surface of the fifth lens is configured to be an aspheric surface which has a concave shape near the optical axis and has a convex shape in the peripheral portion, and the imaging lens has a total of five lenses.