Patent ID: 8582216

Claim:
An image lens module, in an order from an object side to an image side thereof, comprising: a first lens with positive refractive power, the first lens comprising a first object-side surface and a first image-side surface; a second lens with negative refractive power, the second lens comprising a second object-side surface and a second image-side surface; a third lens with positive refractive power, the third lens comprising a third object-side surface and a third image-side surface; and an image plane; wherein the image lens module satisfies the formulas: FB/TTL>0.16; (1) G1R1/F1>1.04; and (2) D1/D2<4.47; (3) wherein FB is a distance between an apex of the third image-side surface and the image plane in a direction parallel to an optical axis of the image lens module, TTL is a distance between the first object-side surface and the image plane along the optical axis, G 1 R 1 is a radius of curvature of the first object-side surface, F 1 is the focal length of the first lens, D 1 is a distance between the end of the effective diameter of the second image-side surface and an optical axis of the second image-side surface along a direction perpendicular to the optical axis of the image lens module, D 2 is a distance between the end of the effective diameter of the second image-side surface and an apex of the second image-side surface along the optical axis of the image lens module.