Patent ID: 7520642

Claim:
An illuminating system, comprising: an electrical interconnection system for interconnecting at least one LED light emitting element to a power source; at least one LED light emitting element positioned on a common light-emitting plane; a first light redirecting element disposed above the at least one LED light-emitting element on said common light emitting plane, each said first light redirecting element including at least one diffusing medium, a diffusing layer, and a component, said component selected from the group consisting of a metallically reflecting bin and a lens system, said metallically reflecting bin having a circular or rectangular cross-section with mathematically curving shape necessitated by meeting the geometrical relationship between input and output aperture sizes, A in Sin 2 θ in =A out Sin 2 θ out , where A in is: if circular, the area of the reflecting bin inlet πr in 2 , r in being the radius of the bin's inlet opening, and if rectangular, (x in )(y in ) θ in is the maximum half-angle emitted by the at least one LED at bin's input opening disposed above it, the full beam angle being 2θ in , A out is the area of the aperture existing at the bin's ideal height H given as if circular, H=(r in +r out )/Tanθ out with r out being the diameter of the bin's ideal output aperture, and θ out is the corresponding output beam's half-angle, the beam's full angle being 2θ out ; if rectangular, H being the larger of H 1 =0.5(x in +x ou t)/Tanθ out,x and H 2 =0.5 (y in +y out )/Tanθ out,y with x out and y out being the aperture edge sizes, θ out,x and θ out,y being the corresponding output beam half-angles in each orthogonal meridians; and H bin is the actual bin height of the metallically reflecting bin of the first light redirecting element, H bin is equal to or less than the ideal bin height H; a second light redirecting element disposed beyond said first light redirecting element comprised of at least one condensing element having effective focal length F and an elevation above said first light redirecting means in the range 0 to 2 F above the output plane of said first light redirecting layer: said at least one condensing element of the second light redirecting layer selected from the group consisting of a Fresnel lens, two sequentially stacked Fresnel-type cylindrical lenses where the axes of each form an angle of 90-degrees with each other, a reflecting plane having a circular or rectangular cutout that allows for a substantial portion of the emitted light to pass outwards without change in brightness or angular direction, and two sequentially stacked lenticular lenses where the axes of each form an angle of 90-degrees with each other; and an output aperture disposed beyond said second light redirecting element, said output aperture containing at least one of a clear window and a spatial light modulator.