Lens and manufacturing method thereof

The invention provides a lens and a manufacturing method thereof, wherein the lens comprises a first lens, a second lens, a third lens, and a light guide member with openings at two ends. The light guide member is provided with a first end and a second end which are opposite, the opening area of the first end is larger than that of the second end, and the second lens is arranged in the opening of the second end of the light guide member. The lens is sequentially provided with the first lens, a first end of the light guide member, a second lens, a second end of the light guide member and a third lens along an axial direction. Due to the arrangement of the light guide member, the peripheral light quantity of the lens can be improved, the peripheral dark area is reduced, the overall brightness uniformity is improved, and the visual taste can be improved. Moreover, most of the light entering the light guide member can be stray light outside the effective light area of the lens, so that the stray light can be recy