提出了一种适用于新型偏振光谱仪调制器实验室装调的简易方法。介绍了该方法的理论依据, 基于该方法完成了调制器的实验室装调实验。为了验证该方法的有效性, 用装调完成的调制器搭建了新型偏振光谱仪实验装置, 通过测量得到了由调制器形成的载波信号, 并用该载波信号对实验装置的测量数据进行了解调处理。结果表明: 在有效测量波段内(525~700nm), 以卤钨灯为光源的平行光管直接输出光的偏振度＜10%;经过线偏振器起偏后, 输出光的偏振度值接近100%。与理论分析的结果一致, 验证了该方法的可行性。

A simple and precise method is proposed for assembling the modulator of an intensity modulation spectropolarimeter. The principle of the method is introduced, and the modulator is built based on the method. In order to verify the effectiveness of the method presented, the experimental device of the intensity modulation spectropolarimeter is assembled using the modulator built. The carriers produced by the modulator are measured and they are used demodulating the data measured by the experiment device. Experimental results show that the polarized degree of the light from a tungsten-halogen lamp collimator is less than 10%,but it is about 100% when the light is polarized by a polarizer in the spectral range of 525~700nm. These results are coincident with the theoretical results well, which verifies the feasibility of method proposed.