Patent ID: 8333480

Claim:
A hollow solar concentrating collector with one focus, the collector comprising: a) a nontracking frame; b) a plurality of linear prisms, each said prism having a wide acceptance angle, each prism having four sides in transverse cross section, said sides including a top surface and three bottom surfaces; said top surface for collecting incident light and simultaneously directing light by total internal reflection, all of the prism top surfaces arrayed coplanar and with abutting linear edges; a first said bottom surface sharing a linear edge with the top surface, the first bottom surface including a metal layer to reflect light up to the top surface; a second said bottom surface sharing a linear edge with the first bottom surface, the second bottom surface oriented to reflect light by total internal reflection at a predetermined angle; a third said bottom surface sharing a linear edge with the second bottom surface and the other linear edge with the top surface, whereby the third bottom surface transmits the light delivered by the other prism surfaces, through air toward the focus; c) a plurality of linear metal reflectors, each said reflector being coextensive with each said prism, each reflector having a long top edge and a long bottom edge, said reflector top edge disposed adjacent the prism edge shared by the top surface and first bottom surface, the reflector bottom edge extending diagonally to the prism edge shared by the second bottom surface and the third bottom surface; d) a compound reflector bottom; e) a linear absorber disposed in the collector focus, said absorber being substantially rectangular in transverse cross section, the absorber cross section having a long axis and a short axis.