Patent ID: 8520301
Filing Date: 2013-08-27
Classification: G02B

Abstract:
1. A lens module, comprising: a lens barrel comprising an object-side end and an image-side end opposite to the object-side end; at least one lens received in the lens barrel; and a filter element received in the lens barrel, and comprising a transparent substrate, an anti-reflection film, and an infrared filtering film; the transparent substrate comprising an object-side surface facing the object-side end and an image-side surface facing the image-side end; the anti-reflection film coated on the object-side surface, and the infrared filtering film coated on the image-side surface; wherein the anti-reflection film comprises first to fourth layers orderly stacked on the object-side surface, the odd numbered layers of the anti-reflection film are made from titanium dioxide (TiO wherein the infrared filtering film comprises first to fifty fourth layers orderly stacked on the image-side surface, the odd numbered layers of the infrared filtering film are made from TiO