The secondary mirror/reflector It's mainly applied to Linear Fresnel CSP technology for the RECEIVER, to capture and collect the scattering or distorting sunlight reflected by primary mirror reflector, by using its curved reflecting shape, to reflect these scattered sunlight onto the receiver tube again, Thereby it will increase the concentrating effect, and finally improve the energy efficiency of whole solar field system. The secondary reflector, is usually combined with two pieces of curved reflector mirror, or directly to make up of one single piece of “M” shape mirror reflector. It has the features with high accuracy shape, high reflectivity, high-temperature resistance and strong durability.