【摘要】 为建立一套测量精度优于±0.5%的中波红外透过率测量系统，本文基于单通道测量法搭建了一套中波红外透过率测量装置。按照能量流通方向阐述了系统工作原理，对系统测量误差的理论分析表明，中波红外透过率测量系统误差源主要为机械斩波器和锁相放大器，其综合影响不确定度约为±0.22%。最后，通过该系统对中波红外镜头进行了实测实验，测量结果表明，中波红外光学系统透过率测量误差约为±0.23%,与理论分析基本一致，该结果验证了理论分析，同时，也满足研制系统测量精度的指标要求。该方法也可以推广到其它波段透过率系统误差评估中，基于相同测量原理，该方法也可推广到反射率测量误差评估中。更多还原

【Abstract】 In this paper, a mid-wave infrared transmittance measurement device is built based on the single-channel measurement method to establish a mid-wave infrared transmittance measurement system with accuracy better than ±0.5 %.The principle of this system is expounded in the direction of energy flow.The theoretical analysis of the measurement error of the system indicates that the main error sources of the mid-wave infrared transmittance measurement system are the mechanical chopper and the lock-in amplifier, and the combined influence uncertainty is approximately ±0.22 %.Finally, the mid-wave infrared lens is measured experimentally by this system.The measurement results show that the transmittance measurement error of the mid-wave infrared optical system is approximately ±0.23 %,which is basically consistent with the theoretical analysis.This result verifies the theoretical analysis and also meets the measurement accuracy requirements of the developed system.This method can also be extended to the error assessment of transmittance systems in other wavebands.Based on the same measurement principle, this method can also be extended to the error assessment of reflectance measurement.更多还原