Volume Phase Holographic Lenses for Efficient Planar Solar Track-Concentrators

Volume transmission phase holographic lenses were designed and recorded to obtain a simple, lightweight, compact and inexpensive planar solar concentrator. To avoid any mechanical movement, a passive solar tracking system is also proposed by using angular multiplexed holographic lenses. Furthermore, these solar concentrators have no overheating problems resulting from the absorption of infrared frequencies, because in this spectral region the proposed volume holographic lenses do not work. Finally, the realized samples were tested and a good efficiency was obtained.