LIGHT GUIDE

摘要

A light guide (201) including a transparent element is presented. The transparent element includes an optical diverter section (204) including one or more reflective surfaces (205) forming walls of a notch (206) extending into the diverter section, where the reflective surfaces provide total reflections for directing light into directions lateral with respect to an arrival direction of the light. The transparent element includes an optical channel section (208) for receiving the light from a light source and for directing the light to the optical diverter section. The optical channel section includes a side surface (209) shaped to provide total reflections for directing light to the optical diverter section. The optical channel section makes it possible to place the light source a distance apart from the optical diverter section and also to prevent or at least to reduce direct propagation of light from the light source to the lateral directions.

主权项

1. A light guide for modifying a light distribution pattern of a light source, the light guide comprising a transparent element made of transparent material having refractive index greater than unity and the transparent element comprising an optical diverter section comprising:
one or more reflective surfaces constituting walls of a notch extending into the diverter section, the one or more reflective surfaces being shaped to provide total reflections for directing light into directions lateral with respect to a direction in which the notch extends into the diverter section , and one or more penetrable surfaces each being on a route of light reflected from one of the one or more reflective surfaces,wherein the transparent element further comprises an optical channel section for receiving light from the light source and for directing at least a part of the received light to the one or more reflective surfaces of the optical diverter section, the optical channel section comprising a side surface shaped to provide total reflections for directing, towards the optical diverter section, at least a part of light falling to the side surface.