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1. 发明授权

US4830879A Broadband antireflective coating composition and method 失效
标题翻译：宽带抗反射涂料组合物及方法
公开(公告)号：US4830879A
公开(公告)日：1989-05-16
申请号：US911577
申请日：1986-09-25
申请人： Jagadish Debsikdar
发明人： Jagadish Debsikdar
IPC分类号： B05D5/06 , C03C17/25 , C03C17/27 , C08G79/00 , C09D1/00 , C09D183/02 , C09D185/00 , G02B1/11
CPC分类号： B05D5/061 , C03C17/25 , C03C17/27 , C08G79/00 , C09D1/00 , C09D183/02 , C09D185/00 , G02B1/111 , C03C2217/229 , C03C2218/113 , C03C2218/322
摘要： The invention relates to antireflective coatings and to a process for depositing the antireflective coatings on solar collector cover plates, optical elements such as lenses and windows in high-energy visible and near-IR lenses and on other glass or metal or metal-alloy or single crystal surfaces, including the steps of hydrolyzing an alkoxysilane, titanium alkoxide, aluminum alkoxide, tantalum alkoxide, niobium alkoxide, or other alkoxy compounds, or a mixture thereof, depending upon the final coating composition desired; to prepare polymeric solutions of the alkoxy compound/or compounds in which the polymer molecules or macromolecules (i.e. the primary particles) grow with time; depositing layers of coatings from the polymeric solutions by state of the art processes (such as spraying, dipping or spinning method), and drying to form chemically bound microporous gel layers; thermally treating the gel-coating in a manner adapted to remove solvent, excess water and residual organics from the gel coating. Microporous coatings produced by the above procedure will be characterized by graded particles and hence graded porosity across the coating thickness, --larger porosity on the top surface and smaller porosity in the substructure--, and will have gradual transition of refractive index (i.e. graded refractive index) across the coating thickness. Coatings produced by the process of this invention can be used to reduce or eliminate reflection losses from surfaces of transmitting optical elements over a wide spectrum of light waves.
摘要翻译：本发明涉及抗反射涂层以及用于将抗反射涂层沉积在太阳能收集器盖板上的光学元件，例如高能可见光和近红外透镜中的透镜和窗口以及其它玻璃或金属或金属合金或单个取决于所需的最终涂料组合物，包括水解烷氧基硅烷，烷氧基钛，烷氧化铝，烷氧化铝，烷氧基醇，铌醇盐或其它烷氧基化合物或其混合物的步骤; 制备烷氧基化合物/或其中聚合物分子或大分子（即初级颗粒）随时间生长的化合物的聚合物溶液; 通过现有技术方法（例如喷涂，浸渍或纺丝方法）从聚合物溶液沉积涂层，并干燥以形成化学结合的微孔凝胶层; 以适于从凝胶涂层除去溶剂，过量水和残余有机物的方式热处理凝胶涂层。通过上述方法制备的微孔涂层的特征在于分级颗粒，因此在涂层厚度上的分级孔隙率，上表面上的较大孔隙率和亚结构中较小的孔隙率，并且将具有折射率的逐渐转变（即分级折射率）穿过涂层厚度。通过本发明的方法生产的涂层可以用于减少或消除在宽光谱范围内的透射光学元件表面的反射损失。

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