为分析激光发射系统的性能, 需要测量激光光斑的绝对功率密度时空分布, 探测器阵列靶是有效手段之一。为实现定量分析, 需要对探测器阵列靶进行标定。探测器阵列靶单元数多, 标定难度大, 设计有效的标定系统十分重要。设计了一种新的标定系统, 该系统采用逐点扫描的方式, 具有适用性广、成本低、精度高等特点。并以某项目为例对标定系统的测量不确定度进行了测试分析, 结果表明: 可见光波段的测量不确定度为2.99%, 近红外波段的测量不确定度为3.62%,中红外波段的测量不确定度为6.17%.该标定系统是探测器阵列靶标定的有效手段, 值得借鉴。

In order to analyze the performance of the laser emission system, it was necessary to measure the spatial-temporal distribution of the absolute power density of the laser spot. The detector array target was one of the effective methods. To achieve quantitative analysis, the detector array target needed to be calibrated. The number of detector array target units was large, and the calibration was difficult. It was very important to design an effective calibration system. This paper designed a new calibration system, which adopted the point-by-point scanning method. This way had the characteristics of wide applicability, low cost and high precision. In order to test the system, taking a project as an example, the measurement uncertainty of the calibration system was tested and analyzed. The results show that the measurement uncertainty in the visible light band is 2.99%, and the measurement uncertainty in the near-infrared band is 3.62%. The measurement uncertainty in the mid-infrared band is 6.17%. This calibration system was an effective way for target calibration of detector array, it was worth learning.