Patent ID: 8283554

Claim:
An apparatus for obtaining radiant energy comprising: a) first and second photovoltaic receivers; b) a primary curved reflective surface disposed to reflect incident polychromatic radiation toward a first focal plane; and c) a spectral separator disposed between the first focal plane and the primary curved reflective surface and between the source of the radiant energy and the first and second photovoltaic receivers, the spectral separator formed onto a solid body of transparent material and comprising: (i) a dichroic separating surface, convex with respect to the incident reflected polychromatic radiation and treated to reflect a first spectral band toward the first photovoltaic receiver and to transmit reflected polychromatic radiation outside the first spectral band; (ii) a curved separator reflective surface, convex with respect to the light transmitted through the dichroic separating surface and treated to reflect at least a portion of the light transmitted through the dichroic separating surface toward the second photovoltaic receiver; and wherein the dichroic separating surface is optically decentered with respect to the curved separator reflective surface.