Patent ID: 8462436
Filing Date: 2013-06-11
Classification: F21S,G02B

Abstract:
1. A combination band-pass filtering system consisting of a multiple set of cold mirrors and infra-red absorbers set in a 360-degree cascade arrangement for the purpose of limiting and re-directing photons of selected wavelengths and composed of: an input port accepting solar light photons of undetermined wavelengths; an output port allowing the exit of non-focused said light photons of selected wavelengths; a first cascaded set of triangular cold mirrors each composed of a plane reflective surface positioned 45-degrees to the axis of light entering at said input port; a second cascaded set of cold mirrors each composed of a plane reflective surface positioned a distance, with axis at 45-degrees to reflected light, from said first cascaded set of cold mirrors; a third cascaded set of cold mirrors each composed of a plane reflective surface with axis at 45-degrees to reflected light from said second cascaded set of outer cold mirrors; a fourth cascaded set of triangular cold mirrors each composed of a plane reflective surface, positioned 45-degrees to light received from said third set of outer cold mirrors and with reflected light toward said output port.