【摘要】 本文介绍一种用表面等离子体谐振（ＳＰＲ）间接测量物质折射率的新方法。从理论上对这种方法作了论证，运用这种方法对ＬＢ膜做了测试实验，推算出其折射率，并且分析了这种方法适用特点更多还原

【Abstract】 A new method (Surface Plasmon Resonance) is introduced which can be used to determine indirectly refractive index in this paper.The theory of this method is given.The method is used to determine resonance angles of different layers of LB film,then their refractive indexes are calculated.Finally applied characteristics of the method is explained.更多还原