Patent ID: 8018529

Claim:
A camera module comprising: a barrel; a holder engaged with the barrel, the holder comprising an inner chamber; a first lens received in the barrel; an image sensor received in the inner chamber of the holder; and a second lens mounted on the holder proximate to the image sensor, the second lens being configured for preventing dust accessing into the inner chamber, the second lens comprising a main body and an infrared cut film formed on and in contact with an outside surface of the main body or embedded within the main body, wherein the main body comprises a flat portion and two curving portions, the two curving portions being respectively formed on opposite surfaces of the flat portion, wherein the second lens further comprises two multi-layer films respectively sandwiched between the flat portion and the two curving portions, and the two multi-layer films have the same structure each of which includes a plurality of low refractive index layers and high refractive index layers when each low refractive index layer and each high refractive layer are alternately stacked one on another.