| 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 (203) and second light beams to a second quarter-space (204), where the first and second quarter-spaces are defined by mutually perpendicular spatial planes (xy, xz) and one (xy) of the spatial planes constitutes a planar boundary between the first and second quarter-spaces. The light guide element comprises 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 comprises grooves (213) for spreading the light distribution pattern of the second light beams in the direction ( ±y) of the section line between the spatial planes. |
