ADesign of Fresnel lens for solar concentrator

An ultra-thin Fresnel condenser lens was discussed and designed. According to Fema principle, an aspheric surface was designed as central refraction area, and a total internal reflection (TIR) prism was designed as a catadioptric area in saw-teeth part. The optimal condense performance was achieved with ZEMAX. ZEMAX was used to simulate the concentration and distribution of Fresnel condenser, and a Fresnel condenser with thickness of 30mm was designed. The compounded Fresnel lens improves the utilization of solar energy and provides a better uniformity of energy distribution. The design method generates a better compound condenser than conventional Fresnel condenser.