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为了仿真太阳光的成像情况,基于标量衍射理论、辐射度学建立了包括光学系统模型和光电转换模型在内的完整的数字太阳敏感器成像模型。该模型适用于视场范围内任意角度入射的太阳光。同时,该模型所包含的从太阳辐射到成像面上像元灰度的能量转换体系完整准确。将太阳辐射作为模型输入进行了数值仿真,并与基于太阳模拟器的地面实验结果进行了对比分析。结果表明,该成像模型能比较准确地模拟太阳光的成像情况。该研究为后续的基于太阳敏感器的太阳光和杂散光成像仿真和对比研究提供了基础。
In order to simulate the imaging of sunlight, a complete digital solar sensor imaging model including optical system model and photoelectric conversion model was established based on the scalar diffraction theory and radiometrics. This model is suitable for incident sunlight at any angle within the field of view. At the same time, the energy conversion system contained in the model from the solar radiation to the pixel gray scale on the imaging plane is complete and accurate. The solar radiation was modeled as a model input and compared with the ground-based experimental results based on the solar simulator. The results show that the imaging model can simulate the imaging of sunlight more accurately. This study provides the basis for subsequent simulation and comparative studies of sun-sensor-based imaging of sunlight and stray light.