AN ILLUMINATOR

摘要

An illuminator is formed as a light pipe (12) having a substantially planar front surface (14) and a faceted back surface (16) comprising a series of angled facets (18) arranged to reflect light towards and through the planar front surface (14), and a light input port (20, 22; 40) through which light is fed into the light pipe (12). The light pipe (12) is looped to define an endless light path and the walls (24, 26) of the looped light path are arranged such that light entering the light pipe (12) travels about the loop such that the loop is illuminated throughout the front surface (14).