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Spectral characterization and calibration of AOTF spectrometers and hyper-spectral imaging systems

机译：AOTF光谱仪和高光谱成像系统的光谱表征和校准

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摘要

The goal of this article is to present a novel method for spectral characterization and calibration of spectrometers and hyper-spectral imaging systems based on non-collinear acousto-optical tunable filters. The method characterizes the spectral tuning curve (frequency-wavelength characteristic) of the AOTF (Acousto-Optic Tunable Filter) filter by matching the acquired and modeled spectra of the HgAr calibration lamp, which emits line spectrum that can be well modeled via AOTF transfer function. In this way, not only tuning curve characterization and corresponding spectral calibration but also spectral resolution assessment is performed simultaneously over the whole imaging plane. The obtained results indicated that the proposed method is efficient, accurate and feasible for routine calibration of AOTF spectrometers and hyper-spectral imaging systems and thereby a highly competitive alternative to the existing calibration methods.
机译：本文的目的是提出一种基于非共线声光可调滤波器的光谱仪和高光谱成像系统光谱表征和校准的新方法。该方法通过匹配HgAr校准灯的采集光谱和建模光谱来表征AOTF（声光可调滤波器）滤波器的光谱调谐曲线（频率-波长特性），该光谱发射出可以通过AOTF传递函数很好地建模的线谱。以这种方式，不仅调谐曲线表征和相应的光谱校准，而且在整个成像平面上同时执行光谱分辨率评估。获得的结果表明，所提出的方法对于AOTF光谱仪和高光谱成像系统的常规校准是有效，准确和可行的，因此是现有校准方法的极具竞争力的替代方法。

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