LIGHTING SYSTEM COMPRISING A MASK WITH SMALL APERTURES

摘要

A lighting unit comprises an optical component (1) having an interior surface (3) and an exterior surface (5) , the interior surface (3) of the optical component (1) for receiving a beam (10) of collimated light incident thereon, and the exterior surface (5) forming an exterior surface of the lighting unit. The optical component (1) comprises a plurality of Fresnel or diffractive lens elements (9) arranged to focus the beam of light (10) to a corresponding plurality of points in a predefined pattern on the exterior surface (10) thereof .The exterior surface (5) of the optical component (1) is provided with a substantially opaque mask (7) which is patterned with apertures at a plurality of points corresponding to the predefined pattern so that the light may emanate therethrough. This avoids "phantom" light or "ghost" light on the lighting unit .