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The Improvement on the Performance of DMD Hadamard Transform Near-Infrared Spectrometer by Double Filter Strategy and a New Hadamard Mask

机译:双重滤波策略和新型Hadamard掩模对DMD Hadamard变换近红外光谱仪性能的改进

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摘要

In the Hadamard transform (HT) near-infrared (NIR) spectrometer, there are defects that can create a nonuniform distribution of spectral energy, significantly influencing the absorbance of the whole spectrum, generating stray light, and making the signal-to-noise ratio (SNR) of the spectrum inconsistent. To address this issue and improve the performance of the digital micromirror device (DMD) Hadamard transform near-infrared spectrometer, a split waveband scan mode is proposed to mitigate the impact of the stray light, and a new Hadamard mask of variable-width stripes is put forward to improve the SNR of the spectrometer. The results of the simulations and experiments indicate that by the new scan mode and Hadamard mask, the influence of stray light is restrained and reduced. In addition, the SNR of the spectrometer also is increased.
机译:在Hadamard变换(HT)近红外(NIR)光谱仪中,存在一些缺陷,这些缺陷会造成光谱能量的不均匀分布,从而显着影响整个光谱的吸收率,产生杂散光,并使信噪比变大。 (SNR)的频谱不一致。为了解决这个问题并提高数字微镜设备(DMD)Hadamard变换近红外光谱仪的性能,提出了一种分波段扫描模式来减轻杂散光的影响,并且开发了一种新的可变宽度条纹的Hadamard掩模。提出提高光谱仪的信噪比。仿真和实验结果表明,通过新的扫描模式和Hadamard掩模,可以抑制和减少杂散光的影响。另外,光谱仪的SNR也增加了。

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