| abstract |
The invention relates to a design for a microlens (i.e., a microscale lens) incorporating existing nanofabrication techniques and capable of being incorporated into high concentration photovoltaic (HCV) systems, thermal collectors. solar and conventional flat photovoltaic systems. Using the theory of wave optics, the design is able to achieve a high numerical aperture, i.e., it can receive light over a wider range of angles. The design also reduces the distance between the focal point offsets during displacements of the light source; this eliminates the need for a tracking system in CPV photovoltaic and photovoltaic PV applications. Reducing the size of the lens also facilitates smaller and lighter photovoltaic concentrator systems, making the photovoltaic concentrator attractive for additional applications. Finally, these concentrators reduce the exchange zone of a typical flat solar thermal system where the heat is received, which improves the overall efficiency of the system and allows its use also during a severe winter weather. |