Free-form surface optical lens for light emitting diode (LED) motorcycle dipped headlight

The utility model discloses a free-form surface optical lens for a light emitting diode (LED) motorcycle dipped headlight. A cylinder hollow cavity is arranged on the inner side of the lens, an opening is arranged at the bottom of the cylinder hollow cavity and used for feeding LEDs and installing the LEDs in the hollow cavity, the lens comprises an incidence surface and an exit surface, the incidence surface is arranged on the inner side of the lens and composed of a flat surface at the top of the hollow cavity and a cylindrical surface on the cavity wall, a free-form surface and a ring flat surface which are arranged at the top of the outer side of the lens form the exit surface, and the side surface of the outer side of the lens is a total reflection free-form surface. According to the free-form surface optical lens, other auxiliary devices are not required for distributing light, loss is reduced, light-use efficiency is improved, and the free-form surface optical lens is simple in structure, small in size