本文介绍了用激光干涉仪直接测量空气折射率的数据处理系统。文章论述了测量空气折射率对精密干涉计量的重要作用;介绍了激光折射率干涉仪工作原理;详细推导了数据处理系统公式来源和简化公式的建立;提出了一种为完成上述数学运算而设计的既省设备又有效的逻辑电路;最后对简化式进了精度核算。图4,参4。 This paper presents a data processing system for directly measuring the refractive index of air using a laser interferometer. The paper discusses the important role of measuring the refractive index of air on the precision interferometry. The working principle of the laser refractive index interferometer is introduced. The source of the data processing system formula and the establishment of the simplified formula are deduced in detail. Both the device and the effective logic circuit; Finally, the simplified into the accuracy of accounting. Figure 4, reference 4.