▎ 摘　　要

NOVELTY - A laser excitation metal substrate fluorescent film comprises substrate metal and fluorescent film prepared by sintering substrate metal polishing mirror surface. The thickness of fluorescent film is 20-100. The preparation raw material of fluorescent film comprises fluorescent powder, light scattering agent and low melting point glass powder. USE - The laser excitation metal substrate fluorescent film is used in fluorescent conversion module in manufacturing reflection type laser excitation fluorescent illumination module and laser illumination lamp formed by laser illumination module (all claimed). ADVANTAGE - The film has raw material that is made of ink printed on substrate metal, does not contain adhesive in composition, and avoids adhesive and other additives affecting film stability, luminous uniformity and light effect. The module improves extraction rate of light, and improves light efficiency of white light fluorescence conversion module prepared by laser excited metal substrate fluorescent film by 15-25% higher than that of traditional glass fluorescent film. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a method for preparing laser excitation metal substrate fluorescent film comprising polishing, cleaning and drying single surface of substrate metal, mixing fluorescent powder, light scattering agent and low melting point glass powder to prepare luminous ink, printing on polishing mirror surface of substrate metal to prepare fluorescent film wet film, drying at 40-280degrees Celsius, sintering at 450-660degrees Celsius, and cooling to room temperature; (2) a fluorescent conversion module comprising fluorescent light source unit made of laser excitation metal substrate fluorescent film, reflecting layer, welding layer and radiating substrate; and (3) a method for preparing fluorescent conversion module comprising processing radiating substrate material into needed size, making laser excitation metal substrate fluorescent film into rectangular or circular element with area of 3.14-706.5 mm2 to obtain fluorescent light source unit, plating high reflection film on upper surface of radiating substrate, or spark plasma sintering (SPS) welding or bonding mirror surface aluminum preparation reflecting layer, embedding fluorescent light source unit in hole of reflecting layer, tightly attaching non-film surface of fluorescent light source unit to radiating substrate and welding by SPS welding or conductive silver paste and firmly fixing fluorescent light source unit on radiating substrate. The reflecting layer is set on upper surface of radiating substrate. The upper surface of radiating substrate is surface with same direction as film surface of fluorescent light source unit. The reflecting layer is provided with blind hole for placing fluorescent light source unit. The fluorescent light source unit is embedded in blind hole. The film surface of fluorescent light source unit is upward. The non-film surface of fluorescent light source unit is fixedly connected with radiating substrate through welding layer. The welding layer is solder layer between fluorescent light source unit and radiating substrate.