NOVELTY - The heat-rejecting optic comprises a refractive optical element that has an edge and a first refractive index and is configured to provide total internal reflection of incoming light (20), a receiver or a receiving layer (40) that is disposed along the edge of the optical element and has a second refractive index, and an intermediate layer (35) that has a third refractive index and is disposed between the refractive optical element and the receiver. The receiving layer is separated from the edge by the intermediate layer.    USE - The heat-rejecting optic is useful in an array of photovoltaic cells or a high concentration photovoltaic system for reducing a thermal load on the photovoltaic cell or in a lens concentrator system for rejecting heat on the photovoltaic cell (all claimed).    ADVANTAGE - The heat-rejecting optic prevents the photovoltaic cell from undesirable heating and damage, and enhances service life, durability, performance and power production efficiency of the photovoltaic cell.    DETAILED DESCRIPTION - The heat-rejecting optic comprises a refractive optical element that has an edge and a first refractive index and is configured to provide total internal reflection of incoming light (20), a receiver or a receiving layer (40) that is disposed along the edge of the optical element and has a second refractive index, and an intermediate layer (35) that has a third refractive index and is disposed between the refractive optical element and the receiver. The receiving layer is separated from the edge by the intermediate layer. The third refractive index is less than the first and second refractive indices, and the first, second and third refractive indices induce frustrated total internal reflection (FTIR) of light within the refractive optical element for causing a selective wavelength of light to be ejected into the receiver. The refractive optical element and the receiver are separated by a distance that is on an order of one wavelength of the light to be ejected into the receiver. The intermediate layer has a thickness that is on an order of one wavelength of the light to be ejected into the receiver. The wavelength of the ejected light is: a function of the distance separating the refractive optical element and the receiver; a function of the thickness of the intermediate layer; and a function of a material composition of the intermediate layer. The intermediate layer and the receiving layer modify the total internal reflection within the optical element to provide the FTIR for coupling an evanescent wave, which is created at the edge of the optical element, out of the optical element through the intermediate layer and into the receiving layer. The coupled out evanescent wave comprises infrared radiation, and wavelengths of greater than 1800 nm. The intermediate layer is an air gap. The optical element and the receiving layer are formed from glass. INDEPENDENT CLAIMS are included for:    (1) a lens concentrator system for rejecting heat on a photovoltaic cell;    (2) a method of manufacturing a solar power modular assembly; and    (3) a method of reducing a thermal load on a photovoltaic cell.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross-sectional view of a heat-rejecting optic.    Secondary optical element (15)    Incoming light (20)    Unwanted wavelength (30)    Intermediate layer (35)    Receiving element or layer. (40)