光电成像系统的绝对光谱响应效率测量及分析

为了准确测量光电成像系统的绝对光谱响应效率，采用光学系统光能量传递公式以及图像传感器的物理模型，得到了光电成像系统绝对光谱响应效率的计算公式，在此基础上设计了基于积分球、多光谱发光二极管光源、标准探测器及透射式平行光管的光电成像系统绝对光谱响应效率测量装置，并对光谱响应效率已知的可见光数字相机进行实验测量和分析。结果表明，在380nm~1100nm波长范围内测量装置测得的可见光数字相机的绝对光谱响应效率与标准值具有较好的一致性，最大相对误差为1.7%，各波长点的测量不确定度在置信概率为95%时均小于0.2%，满足一般的测量要求。该装置能够准确地对光电成像系统的绝对光谱效应效率进行测量。

Measurement and analysis of absolute spectral response efficiency of photoelectric imaging system

In order to accurately measure the absolute spectral response efficiency of the photoelectric imaging system, the optical energy transfer formula of the optical system and the physical model of the image sensor were analyzed, and the calculation formula of the absolute spectral response efficiency of the photoelectric imaging system was obtained. Based on the theoretical formula, an absolute spectral response efficiency measurement device for the photoelectric imaging system based on integrating spheres, multispectral light source of light-emitting diode, standard detector, and a transmission-type parallel light tube was designed. Experimental measurement and analysis of visible light digital cameras with known spectral response efficiency was carried out. The results show that, the absolute spectral response efficiency of the visible light digital camera measured by the measuring device in the wavelength range of 380nm~1100nm is in good agreement with the standard value, and the maximum relative error is 1.7%. When the probability is 95%, it is less than 0.2%, which meets the general measurement requirements. The device can accurately measure the absolute spectral effect efficiency of the photoelectric imaging system.