NOVELTY - A low-radiation Fresnel lens (1-3) is manufactured by filling transparent optical silica gel into Fresnel lens molding mold; pressing low-radiation film surface of LOW-E glass downward on Fresnel lens molding mold; using rolling process for combining low-radiation film surface of LOW-E glass substrate with the transparent optical silica gel in Fresnel lens molding mold closely; solidifying transparent optical silica gel for molding; and separating mold, and obtaining low-radiation Fresnel lens with transparent optical silica gel being covered on low-radiation film surface of LOW-E glass (1).    USE - Method for manufacturing low-radiation Fresnel lens for condenser photovoltaic system (claimed).    DETAILED DESCRIPTION - Low-radiation Fresnel lens (1-3) is manufactured by:    (A) filling transparent optical silica gel into Fresnel lens molding mold;    (B) pressing low-radiation film surface of LOW-E glass downward on Fresnel lens molding mold which is filled with transparent optical silica gel, for making transparent optical silica gel in Fresnel lens molding mold be fitted to low-radiation film surface of LOW-E glass substrate;    (C) using rolling process for combining low-radiation film surface of LOW-E glass substrate with the transparent optical silica gel in Fresnel lens molding mold closely;    (D) solidifying transparent optical silica gel for molding; and    (E) separating mold, and obtaining low-radiation Fresnel lens with transparent optical silica gel being covered on low-radiation film surface of LOW-E glass (1).    An INDEPENDENT CLAIM is included for a condenser photovoltaic system which comprises box (6), where hole is opened on bottom in box and is fixed with gallium arsenide battery sheet (5). A secondary dodging prism (4) is bonded above gallium arsenide battery sheet. The low-radiation Fresnel lens is acted as condenser element and is arranged above secondary dodging prism. The low-radiation Fresnel lens is arranged on the box.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram illustrating a condenser photovoltaic system.    LOW-E glass (1)    Low-radiation fresnel lens (1-3)    Secondary dodging prism (4)    Battery sheet (5)    Box (6)