Patent ID: 7789536
Filing Date: 2010-09-07
Classification: F21V,F21Y,G02B

Abstract:
1. A lighting device comprising a substantially optically transparent substrate, a plurality of light emitting diodes arranged on said substrate, a plurality of collimating optically transparent bodies defining a space therebetween, each optical transparent body being optically coupled to a respective light-emitting diode of the plurality of light-emitting diodes for collimating light emitted thereby by means of total internal reflection, each optical transparent body having a refractive index higher than the refractive index of air, and an optically transparent filling material at least partially filing the space between the optical transparent bodies and having a refractive index higher than the refractive index of air, wherein collimating surfaces of said plurality of collimating optically transparent bodies are separated by a gap from said transparent filling material.