This utility model relates to the field of automotive lighting technology, and more particularly to an optical
system for improving illumination uniformity, and automotive lights and vehicles using the same. The optical
system for improving illumination uniformity includes a
collimator that collimates light emitted from a
light source, and the
collimator includes at least one collimating unit; and a light commutation unit, including at least one set of light commutation units, each light commutation unit including an incident light unit and an exiting light unit. The incident light unit converges light from the
collimator, and the exiting light unit is composed of multiple refractive surfaces, with the
light cone angle formed by the light rays passing through the ends of each refractive surface being approximately equal. This optical
system for improving illumination uniformity achieves
light emission through multiple refractive surfaces. Because the
light cone angle of each refractive surface is approximately equal, it can weaken the contrast between light and dark areas, thereby improving uneven light distribution and enhancing illumination uniformity.