Patent ID: 8547648
Filing Date: 2013-10-01
Classification: G02B

Abstract:
1. A lens module, comprising: a first lens, disposed between an object side and an image side, wherein a first surface of the first lens facing the object side is an aspheric surface, and a curvature radius of the first surface is R a second lens, disposed between the first lens and the image side, wherein a second surface of the second lens facing the image side is an aspheric surface, and a curvature radius of the second surface is R a light transmissive device, wherein the first lens and the second lens are respectively leaned against two opposite sides of the light transmissive device; and an aperture stop, disposed between the first lens and the second lens, wherein a distance from the first surface to the aperture stop is dl, and a distance from the second surface to the aperture stop is d wherein the lens module satisfies 6>d wherein the first surface and the second surface are even aspheric surfaces, and which are respectively expressed as: wherein α