The exigencies of high-concentration photovoltaics motivate optics that (1) obviate the need for optical bonds, (2) exhibit maximal optical tolerance, (3) are not damaged at off-axis orientation, and (4) allow convenient location of the solar cell and heat sink. We show that dual-mirror unfolded aplanats can satisfy all these criteria. Lens enhancement improves compactness and, with millimeter-scale cells, concentrator depth is only a few centimeters, amenable to precise large-volume fabrication.
© 2008 Optical Society of America
Optical Design and Fabrication
Original Manuscript: February 26, 2008
Revised Manuscript: April 7, 2008
Manuscript Accepted: April 9, 2008
Published: May 13, 2008
Jeffrey M. Gordon, Daniel Feuermann, and Pete Young, "Unfolded aplanats for high-concentration photovoltaics," Opt. Lett. 33, 1114-1116 (2008)