Lens and preparation method thereof

The embodiment of the invention provides a lens and a preparation method thereof, the lens comprises a substrate and a plurality of light absorption protrusions, the light absorption protrusions are arranged on the surface of at least one side of the substrate in the front-back direction, the light absorption protrusions are arranged at intervals, and a light transmission channel extending in the front-back direction is formed between every two adjacent light absorption protrusions. The light transmittance of the light absorption protrusions is lower than that of the substrate. According to the lens disclosed by the embodiment of the invention, the light absorption bulges with lower light transmittance than the substrate are arranged on the substrate, so that the intensity of light rays penetrating through the lens along the front-back direction, particularly the intensity of the light rays forming an included angle with the front-back direction, can be effectively weakened, and the probability of glare of a