Patent ID: 7969666

Claim:
A lens module, comprising: a barrel, the barrel comprising a cover with a taper-shaped hole defined therein and a hollow cylinder extending from the cover, the cover comprising a roughened inner surface in the hole and a roughened inside surface facing towards the hollow cylinder; at least one optical lens received in the barrel and comprising an optically active part and a peripheral optically non-active part around the optically active part, the optically non-active part comprising two opposite roughened surfaces, wherein a surface roughness of the inner surface in the hole, the inside surface of the cover, and the opposite surfaces of the optical lens is in a range from 500 nm to 5 μm, and a peak to valley distance of the inner surface in the hole, the inside surface of the cover, and the opposite surfaces of the optical lens is in a range from 5000 nm to 50 μm.