Patent ID: 8582220

Claim:
A lens module for capturing images, wherein the lens module has an effective total focal length, and the lens module comprises: a first lens group comprising: a first substrate having a first side and a second side; a diaphragm disposed on the first side of the first substrate, wherein an aperture through which the image is captured is located on the diaphragm; a first lens disposed on the first side of the first substrate; and a second lens disposed corresponding the second side of the first substrate; a second lens group comprising: a second substrate having a first side and a second side; a third lens disposed on the first side of the second substrate; and a fourth lens disposed on the second side of the second substrate, wherein the lens module meets the following requirements: 1.5 <F 1 /Ft< 2; and 1.5 <F 2 /Ft< 2, wherein Ft represents a effective total focal length of the lens module, F1 represents an effective focal length of the first lens group, F2 represents an effective focal length of the second lens group, the first lens croup is d 1 thick, the second lens group is d 2 thick, and thicknesses of the first lens group and the second lens group meet the following requirement: 1.8 <d 1 /d 2<2.2.