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| 近红外无热化高光谱成像系统优化设计 |
| Optimization design of near-infrared athermalized hyperspectral imaging system |
| 投稿时间：2024-03-23 |
| DOI：10.3969/j.issn.1005-5630.202403230060 |
| 中文关键词: 无热化 非接触式探测 近红外 微透镜阵列 高光谱图像 |
| 英文关键词:athermalized non-contact detection near-infrared microlens arrays hyperspectral image |
| 基金项目:湖北省重点研发计划项目（2022BBA0074）；湖北省级应用光学一流课程建设项目（2022-65）；华中科技大学省级创新创业项目（GD2022082） |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 1050 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 was 12 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. |
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