Optical coupling lens

An optical coupling lens, comprising:

• a light incident surface;
• a light output surface perpendicular to the light incident surface;
• a reflection surface obliquely interconnected between the light incident surface and the light output surface, an included angle between the reflection surface and the light incident surface being 45 degrees, and an included angle between the reflection surface and the light output surface being 45 degrees;
• a first converging lens and a second converging lens formed on the light incident surface, optical axes of the first converging lens and the second converging lens being perpendicular to the light incident surface and located on a common imaginary plane;
• a third converging lens formed on the light output surface and has a semi-cylindrical shape, a central axial plane of the third converging lens being perpendicular to the light output surface, an intersecting line between the central axial plane and the common imaginary plane being located on the reflection surface, a width of the third converging lens being equal to a diameter of each of the first converging lens and the second converging lens.