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连续可调谐均匀单色照明光源系统作为CCD辐射参量定量化专用测试系统,可用于CCD相对光谱响应度的测量。它与传统的测试装置相比,能够实现光谱分辨率1 nm的光谱响应度定标。但是其采用的大功率氙灯超高压供电引入了测试光源不稳定的问题,导致传统分时测量方法引起的测量不确定度较差,不能满足高精度遥感仪器的定标需求,因此提出了同步采样的方法。从理论和器件噪声模型出发,分别对两种方法的测量不确定度进行分析,得出同步采样的方法测得的定标不确定度优于1.03%,与传统分时测量方法相比不确定度提高了43%。分别采用两种方法对目标探测器进行了CCD相对光谱响应对比测试,结果显示,同步采样的方法获得的CCD相对光谱曲线更平坦,与出厂数据相比离散程度更低,进而验证了分析结论的正确性。
Continuous and tunable uniform monochromatic light source system as CCD radiation parameters quantification special test system can be used for CCD relative spectral responsivity measurement. It achieves a spectral responsivity scale of 1 nm at spectral resolution compared to traditional test setups. However, the high power xenon lamp UHV power supply introduced the problem of instability of the test light source, resulting in poor measurement uncertainty caused by the traditional time-sharing measurement method, which can not meet the calibration requirements of high-precision remote sensing instruments. Therefore, a synchronous sampling Methods. Starting from the theoretical and device noise models, the measurement uncertainty of the two methods are respectively analyzed. The results show that the calibration uncertainty obtained by the method of synchronous sampling is better than 1.03%, which is indefinite compared with the traditional time-sharing method Degree increased by 43%. Two methods were used to compare the relative spectral response of the target detector. The results show that the relative spectral curve obtained by the synchronous sampling method is flatter and more discrete than the factory data, and the results of the analysis Correctness