Optics for illumination devices

摘要

Optics are provided for use in illumination devices the optics having a light guide, a redirecting layer including a plurality of lenses, and a plurality of reflector elements. Light from a light source enters the light guide and is guided therein until it escapes into a reflector element, which reflects at least some of the light received by the reflector element toward a corresponding lens for emission from the illumination device.

主权项

1. An optic for use with a light source in an illumination device, the optic comprising:
a light guide made of light transmissive material, the light guide comprising
a first surface;a second surface opposite the first surface;a light coupling area for receiving light from the light source; anda peripheral edge; a redirecting layer made of light transmissive material, the redirecting layer comprising a plurality of lenses in optical communication with the light guide for emitting light, the redirecting layer being optically attached to the first surface of the light guide; and a plurality of reflector elements adjacent and optically connected to the second surface of the light guide, each reflector element being associated with a lens of the redirecting layer for ejecting light entering the reflector element from the light guide toward the associated lens, wherein each of the reflector elements comprises an inter-step portion to receive light from the light guide, a first portion to reflect light towards the associated lens, and a second portion to reflect light from the inter-step portion to the first portion; the reflector elements comprising a light transmissive material of lower refractive index than the material of the light guide, the reflector elements being arranged such that said material is adjacent to the light guide.