【摘要】 设计并优化了一种近红外无热化高光谱成像系统，其具备非接触式测量红外光谱信息的能力。该光学系统由前置双高斯透镜、微透镜阵列、分光镜以及红外探测器构成，可用来探测750～1 050 nm的近红外光辐射。结构中的微透镜阵列可以大幅度提升微弱光的成像质量，分光系统能提高探测器对近红外特定波长范围的敏感度。ZEMAX光学仿真软件的仿真结果表明，其前置光学系统总长12 mm，在空间频率80 lp/mm处，各波长的调制传递函数（modulation transfer function,MTF）均大于0.6，成像质量良好，在-20℃到50℃温度内像质几乎不变，公差分析结果显示有90%以上的样本符合设计指标，具有良好的实用性。更多还原

【Abstract】 A near-infrared athermalized hyperspectral imaging system was designed and optimized, which was capable of non-contact measurement of infrared spectral information. The optical system consists of a front double Gaussian lens, a microlens array, a beam splitter, and an infrared detector for detecting near-infrared optical radiation from 750 nm to 1 050 nm. The designed microlens array can substantially improve the imaging quality of the weak light, and the beam splitter system improves the detector’s sensitivity to a specific wavelength range of the near-infrared. The ZEMAX simulation showed that the total length of the front optical system was12 mm at a spatial frequency 80 lp/mm, and the MTF(modulation transfer function) of each wavelength was greater than 0.6. The imaging quality was good because the image quality was almost unchanged in the temperature range from-20 ℃ to 50 ℃. The tolerance analysis yielded that more than 90% of the samples agreed with the design specifications, which was of good practicability.更多还原