Lens, e.g. for headlamp arrangement, has diffraction grooves are arranged so that total reflection takes place within grooves, whereby direction of radiation is changed towards center of lens

摘要

The lens consists of a convex lens (1) and refraction grooves (11) arranged coaxially around the convex lens. Light entering the refraction grooves is incident on one or more surfaces of the grooves, which are arranged so that total reflection takes place within the grooves, whereby the direction of the radiation is changed towards the center of the lens.