Freeform lens collimating spectrum-folded Hadamard transform near-infrared spectrometer

Wang, Xiaoduo; Lee, Hua; Juschkin, Larissa; Liu, Yunpeng; Xu, Jialin; Quan, Xiangqian; Lu, Zhenwu

doi:10.1016/j.optcom.2016.06.009

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…Spectrometer is an important detection method for aeronautics and astronautics applications. With the improvement of detection requirements and the miniaturization development of satellites, the need for an imaging spectrometer with high performance has become an urgent demand [1][2][3][4]. However, current miniature spectrometers have numerous limitations in terms of imaging and spectral performances.…”

Section: Introductionmentioning

confidence: 99%

A compact wide-spectrum imaging spectrometer using freeform surface

Feng

Nie

Xiangli

et al. 2020

Optics Communications

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Section: Introductionmentioning

confidence: 99%

A compact wide-spectrum imaging spectrometer using freeform surface

Feng

Nie

Xiangli

et al. 2020

Optics Communications

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“…The low-energy spectral band exhibits a low SNR, nonlinearity, whereas the high-energy spectral band performs well in those aspects. To improve the energy of the entire spectrum, Wang and colleagues proposed a spectrum-folded structure of a HT spectrometer and a special illumination optical device, but the structure of the spectrometer was complex [ 4 , 5 ]. Zhang et al proposed a new algorithm to realize energy compensation of the spectrum and analyzed the effect of the HT on the noise without considering the noise distribution [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

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

Zhang

Liu

et al. 2019

Micromachines

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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.

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