Patent ID: 8009368

Claim:
An aspherical fiber coupling lens that is a biconvex lens with positive refraction power and is applied to a photoelectric coupling module comprising: a first optical surface and a second optical surface; wherein both the first optical surface and the second optical surface are aspherical surfaces and satisfy following conditions: 0.5 < d 2 f < 1.5 ; 1.0 < R 1 - R 2 R 1 + R 2 < 2.0 ; 1.2 < ( 1 R 1 - 1 R 2 ) · f < 2.2 wherein f is the effective focal length of the lens, d 2 is thickness of the lens on optical axis, and R 1 , R 2 respectively are curvature radiuses of the first optical surface and the second optical surface of the lens on optical axis.