Abstract:In order to reduce the damage caused by the heat effect,increase the solar conversion efficiency and overcome the Fresnel losses brought by the secondary mirror,a novel hybrid Fresnel concentrator without using secondary optical element is presented which also overcomes the non-uniform illumination distribution brought by large diameter and geometric concentrating ratio.The desingned Fresnel lens consists of two parts:the inner part and the outer the former being the ring-shaped-focus Fresnel lens,while the outer part is double total internal reflection lens(DTIR).Taking a common Fresnel and a Ring-Shaped-Focus Fresnel with the same light area as an example,a conclusion can be drawn that the Ring-Shaped-Focus Fresnel has higher light utilization and illumination uniformity by Tracepro software.