TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: An adhesive layer (103) is arranged between the first film layer and the second thin film layer. The adhesive layer comprises a chemical binder and a reinforcing shaping object, where the chemical binder is coated on the reinforcing shaping object. The reinforcing shaping object is glass fiber cloth, non-woven cloth or woven textile fabric. The chemical binder is single component, double component or multi- component adhesive. The first film layer and the second thin film layer are made of polyethylene terephthalate (PET), polypropylene (PP), polystyrene (PS) or polycarbonate (PC). An adjacent thin film layer of the adhesive layer is set between the first thin film layer, the second thin film layer and the intermediate thin film layers. The first film layer, the middle thin film layer and the second thin film layer are arranged in a staggered manner in the cylinder-shaped mold surface each other in axial direction, a one large sized composite structure. The front and rear surfaces of the first film layer and/or the second film layer surface are coated with a reflective layer. The reflective layer is silver plating layer and/or aluminum plating composite layer. The thin film layer and second thin film layer are adhered on a cylinder side mold outer wall surface and cured to form concave circular arc surface shaped thin film material; or adhered on a cylinder side mold inner wall surface and cured to form convex circular arc surface shaped thin film material. A cutting groove (105) is set on the cylinder surface shaped mold, to facilitate the cropping of the thin film material based on the required reflective layer width. The cylinder-shaped mold comprises a cross-sectional to complete circular cylindrical or cylindrical mold, where the cross section is fan-shaped with equal part circular arc side column-shaped mold. Preferred Method: The curing process utilizes heating, UV light or natural curing.