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| 高分辨率旋转光栅光谱仪的设计 |
| Design of a high-resolution rotating grating spectrometer |
| 投稿时间：2023-03-13 |
| DOI：10.3969/j.issn.1005-5630.202303130057 |
| 中文关键词: 光谱仪 高分辨率 旋转光栅 |
| 英文关键词:spectrometer high resolution rotating grating |
| 基金项目:上海市地方能力建设项目(21010502900) |
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| 摘要点击次数: 791 |
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| 中文摘要: |
| 针对光栅光谱仪中高分辨率与宽光谱难以同时满足的问题，设计了一款基于旋转光栅的Czerny-Turner（C-T型）光路结构的高分辨率宽光谱拉曼光谱仪，激发波长为532 nm，光谱范围为80～3000 $ {\mathrm{c}\mathrm{m}}^{-1} $，分辨率为1.2 $ {\mathrm{c}\mathrm{m}}^{-1} $。将光谱范围分为低（80～1450 $ {\mathrm{c}\mathrm{m}}^{-1} $）、中（855～2225 $ {\mathrm{c}\mathrm{m}}^{-1} $）、高（1630～3000 $ {\mathrm{c}\mathrm{m}}^{-1} $）3个波段，以优化中波段为主，对全波段进行了优化。通过微调光栅的旋转角度，确保低、中、高波段均位于CCD的有效像面上。该光谱仪成像系统的点列图、均方根图和调制传递函数图均符合设计要求。 |
| 英文摘要: |
| A high-resolution and wide-spectral Raman spectrometer based on a Czerny-Turner (C-T) optical configuration with a rotating grating was designed to address the trade-off between resolution and spectral coverage in grating spectrometers. The excitation wavelength was set at 532 nm, with a spectral range of 80～3000 $ {\mathrm{c}\mathrm{m}}^{-1} $ with a resolution of 1.2 $ {\mathrm{c}\mathrm{m}}^{-1} $ The spectral range was divided into three bands: low (80～1450 $ {\mathrm{c}\mathrm{m}}^{-1} $), medium (855～2225 $ {\mathrm{c}\mathrm{m}}^{-1} $), and high (1630～3000 $ {\mathrm{c}\mathrm{m}}^{-1} $). Optimization was primarily focused on the medium band, while considering the entire frequency band. By fine-tuning the rotation angle of the grating, the low, medium, and high bands were all located on the effective image plane of the CCD detector. The point spread function, root-mean-square (RMS) wavefront error, and modulation transfer function (MTF) of the imaging system all met the design requirements. |
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