Patent ID: 7570436
Filing Date: 2009-08-04
Classification: G02B

Abstract:
1. A two piece type optical lens, in order from the object side towards the image side, comprising: an aperture stop; a first lens element with positive refractive power that is a meniscus aspherical lens having a convex surface on an object side, wherein the first lens element is made of molded glass; a second lens element with positive refractive power that is a meniscus aspherical lens having a convex surface on an image side, wherein the second lens element is made of molded glass; an IR(infrared) cut-off filter; and an image sensor arranged along an optical axis in order from the object side; wherein following expressions are satisfied: wherein f is an effective focal length of the optical lens, d is the distance between the object side of the first lens element and the image side of the second lens element, R