Patent ID: 7755838
Filing Date: 2010-07-13
Classification: F21K,F21S,F21V,F21Y,G02B,H01L

Abstract:
1. An optical device, comprising: at least one transparent body comprising a first transparent body component and a second transparent body component, said transparent body defining an outer surface, at least one entry port, and at least one exit port, said at least one transparent body comprising a material suitable for propagating light, said material having an index of refraction suitable for providing total internal reflection at the surface of said body; said outer surface comprising optically active surfaces angled for total internal reflection of light issuing into and out of said entry and exit ports; said entry and exit ports operable for light-transmittance at substantially all incidence angles up to the critical angle of said material; said optically active surfaces operable as connecting surfaces between said entry and exit ports; said connecting surfaces operable for conveying light by total internal reflection at all incidence angles past the critical angle of said transparent material; said connecting surfaces comprising non-imaging configurations that spatially mix said light; said first transparent body component having a reflective surface angled to reflect light passing from at least one said entry port to at least one said exit port by internal reflection, and having at least one transmissive face for transmitting light to or from said second transparent body component; said first and second transparent body components being separated by at least one gap of lower refractive index so that light within said first component striking said transmissive face at high angles of incidence is totally reflected within said first component.