LIGHT GUIDE ELEMENT

摘要

A light guide element (201) for modifying a light distribution pattern of a light source (202) is presented. The light source radiates first light beams to a first quarter-space and second light beams to a second quarter-space, where the first and second quarter-spaces are defined by mutually perpendicular spatial planes and one of the spatial planes constitutes a planar boundary between the first and second quarter-spaces. The light guide element includes transparent material (207) on a route of the first light beams for modifying the light distribution pattern of the first light beams and a reflective surface (208) for reflecting at least a part of the second light beams to the first quarter-space. A surface of solid material on a route of the second light beams includes grooves for spreading the light distribution pattern of the second light beams in the direction of the section line between the spatial planes.

主权项

1. A light guide element for modifying a light distribution pattern of a light source radiating first light beams to a first quarter-space and second light beams to a second quarter-space, the first and second quarter-spaces being defined by mutually perpendicular spatial planes so that one of the spatial planes constitutes a planar boundary between the first and second quarter-spaces, the light guide element comprising:
transparent material on a route of the first light beams for modifying a light distribution pattern of the first light beams, a refractive index of the transparent material being greater than unity, and a reflective surface for reflecting at least a part of the second light beams to the first quarter-space,wherein a surface of solid material on a route of the second light beams comprises mutually parallel grooves for spreading a light distribution pattern of the second light beams in a direction of a section line between the spatial planes, the grooves being substantially perpendicular to the section line.