Abstract：As the core of the contemporary earth observation system, infrared remote sensing technology is of great significance for improving its performance. As the benchmark for the calibration of infrared detection equipment, the radiation characteristics of the blackbody radiation source directly affect the accuracy of the data, and the emissivity is one of the core parameters to measure the radiation capability of the blackbody. The traditional cavity blackbody is difficult to meet the requirements of calibration, and the surface blackbody provides a new solution for the radiation calibration of large-diameter systems through the plane structure design. Existing studies primarily focus on typical configurations such as V-shaped grooves, square cone arrays, and conical arrays, with emissivity testing relying heavily on experimental methods (such as Fourier transform infrared spectroscopy), leading to high R&D costs. To break through the bottleneck of experimental research, this article employs a ray-tracing approach to simulate light propagation within surface blackbody microstructures. By constructing an equivalent model with microstructure units and a simulation system incorporating 106-level light rays, it comprehensively analyzes geometric parameters (bottom to height ratio, size) and surface optical properties (coating emissivity, reflection component). Simulation results demonstrate that performance improvements in surface blackbodies primarily stem from structural design rather than size expansion. Reducing the bottom-to-height ratio of square cone arrays from 2∶3 to 2∶5 increased normal emissivity from 0.987 to 0.995, whereas a tenfold size increase yielded only a 0.000 01 emissivity gain. Regarding surface reflection, the near-specular reflection proportion exhibits significant structural dependence on uniformity. Increasing NSR from 0% to 25% improved uniformity by 231% for square cone arrays and 224% for V-shaped grooves, but decreased it by 316% for conical arrays. Comprehensive performance comparisons show that square cone and V-shaped groove structures offer substantial advantages over conical arrays. The analysis method used in this article can provide important theoretical support for the design of a surface blackbody.
崔双龙，周怡萌，邢 键，李 意，李文超，何学兰. 微结构阵列对面源黑体发射率影响模拟研究[J]. 光谱学与光谱分析, 2025, 45(10): 2922-2929.
CUI Shuang-long, ZHOU Yi-meng, XING Jian, LI Yi, LI Wen-chao, HE Xue-lan. Simulation Study on the Influence of Microstructured Arrays on the
Emissivity of Surface Blackbody. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2025, 45(10): 2922-2929.
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