下面将仪器的工作原理、基本结构、测试情况、精度分析等,予以简要介绍。一、工作原理为了消除通常光强法测量时光源光强不稳定带来的影响,采用双光路比较法。具体办法如图1所示:把来自光源的光束分为测量光路(I_1=k_1I_0)和参考光路(I_2=k_2I_0)两部分,分光的比例稳定。每一光路均 Below the instrument’s working principle, the basic structure, test conditions, precision analysis, to be briefly introduced. First, the working principle In order to eliminate the usual light intensity measurement of light source instability caused by the impact of the use of dual optical comparison method. The concrete method is shown as in Fig. 1: Divide the light beam from the light source into two parts of measurement light path I_1 = k_1I_0 and reference light path I_2 = k_2I_0, the proportion of the light is steady. Every light path is