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强度调制是一种高光谱偏振信息获取新方法,可有效地解决现有测量法存在的不足。调制器是其中的关键硬件模块之一。从调制器实现偏振、光谱信息调制的基本原理入手,结合偏振、光谱信息的解调理论,提出了调制器参数优化设计方法,并对该方法进行了计算机数值模拟。结果表明:经过优化设计的调制器产生的各个载波信号的频率在光谱仪的采样带宽内均匀分布,有效地拓展了可测Stokes矢量元素谱的带宽范围,也为后续的偏振、光谱信息的高保真解调奠定了基础。
Intensity modulation is a new method of obtaining hyperspectral polarization information, which can effectively solve the existing problems of existing measurement methods. Modulator is one of the key hardware modules. Based on the principle of modulating the polarization and spectral information of the modulator and combining with the demodulation theory of polarization and spectral information, the optimal design method of the modulator parameters is proposed and the numerical simulation of the method is carried out. The results show that the frequency of each carrier signal generated by the optimized modulator is uniformly distributed within the sampling bandwidth of the spectrometer, effectively expanding the bandwidth range of the measurable Stokes vector element spectrum and also providing high fidelity for subsequent polarization and spectral information Demodulation laid the foundation.