TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - The electrolyte is chosen from sodium chloride, potassium chloride and/or calcium chloride. The pH buffer is chosen from ammonium bicarbonate, sodium bicarbonate and/or dibasic sodium phosphate. Preferred Parameters: Concentration of pH buffer in latex polymer system is 0-0.99 wt.%. Electrolyte concentration in latex polymer system is 0-0.7 wt.%. CERAMIC AND GLASS - The concave substrate comprises glass, organic glass, plastic, ceramic or metal material concave mirror condensing concave object.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The acrylic ester is chosen from methyl methacrylate, ethyl methacrylate, butyl methacrylate and/or acrylic acid butyl rubber ester. The initiator is chosen from alkali metal persulfate and/or ammonium persulfate.    TECHNOLOGY FOCUS - POLYMERS - Preferred Product: The film is surface structure unit of diffuse reflection, using periodicity ordered arranging structure formed by regular arrange of monodisperse polymer emulsion particle material itself with hard core-soft shell structure in latex, in order to realize the preparation of total visible light gathering device containing camber photonic crystal film structure. It condenses total visible light and filtrates infrared region and UV band. Preferred Components: The periodicity ordered arranging structure formed by regular arrange of monodisperse polymer emulsion particle material itself with hard core-soft shell structure in latex is formed by packing monodisperse polymer emulsion particle material itself with hard core-soft shell structure as face-centre cubic. Monomer 1 is selected from cinnamene and/or methylstyrene. Monomer 2 is acrylic ester and/or vinyl acetate. Monomer 3 is acrylic acid, methacrylic acid, acrylamide and/or propylene cyanogen. Preferred Parameters: The concentration range of monodisperse polymer emulsion particle material with hard core-soft shell structure in latex is 5-30 wt.%. Particle diameter of monodisperse polymer emulsion particle material with hard core-soft shell structure in latex is 400-1200 nm. Monodisperse exponent is not greater than 0.005. Monomer total dosage is 11-17 wt.% of latex polymer system total weight. Dosage of monomer 1 is 90-95 wt.% of monomer total weight in latex polymer system. Monomer 2 is 3-6 wt.%. Monomer 3 is 0-6 wt.%. Preferred Method: The latex containing monodisperse polymer emulsion particle material with hard core-soft shell structure is acquired by method below, mixing and dispersing monomer 1, monomer 2, monomer 3 hydrophilicity of which are increased in order, in buffer containing pH and electrolyte aqueous solution for regulating particle diameter; milling acquired latex polymer system in the rotate speed of 200-500 rpm/min to mix; heating to 65-85degrees; adding initiator which is 3/5 initiator total amount to make reaction start; after reacting for 2-4.5h, adding initiator which is 1/5 initiator total amount and after reacting for 2-4.5h, adding other initiator. The initiator total dosage is 0.5wt%-2wt% of monomer total weight; after reaction, acquiring latex containing monodisperse polymer emulsion particle material with hard core-soft shell structure. The natural sedimentation method comprises vertical sedimentation or coating method.