Fast Spectral Acquisition Method Based on Compressed Sensing for Liquid Crystal Tunable Filters

SUN Zhishen; ZHANG Xu; WANG Suhui; CAO Yingying; GUO Tengxiao; CAO Shuya

Volume 43 Issue 7

Jul. 2021

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SUN Zhishen, ZHANG Xu, WANG Suhui, CAO Yingying, GUO Tengxiao, CAO Shuya. Fast Spectral Acquisition Method Based on Compressed Sensing for Liquid Crystal Tunable Filters[J]. Infrared Technology , 2021, 43(7): 635-642.

Citation:

SUN Zhishen, ZHANG Xu, WANG Suhui, CAO Yingying, GUO Tengxiao, CAO Shuya. Fast Spectral Acquisition Method Based on Compressed Sensing for Liquid Crystal Tunable Filters[J]. Infrared Technology , 2021, 43(7): 635-642.

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Fast Spectral Acquisition Method Based on Compressed Sensing for Liquid Crystal Tunable Filters

1.
State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
2.
Kunming Institute of Physics, Kunming 650223, China

Received Date: 2021-02-20
Rev Recd Date: 2021-04-25
Publish Date: 2021-07-01

Abstract

Abstract

To improve the spectral acquisition efficiency of the Liquid Crystal Tunable Filter(LCTF). A fast acquisition method which could be applied to the spectral imaging system was proposed. A better observation matrix was designed and constructed. Within the theoretical framework of compressed sensing, spectral super-resolution reconstruction was made possible and the feasibility of the method was verified by experiments. The results indicated that when the sampling rate of was 18.08% (sampling step length was 30 nm), the correlation coefficient between the reconstructed 4.81 nm resolution spectrum and the traditional full sampling spectrum was 0.91, the Peak Signal-to-Noise Ratio (PSNR) of the reconstructed super resolution spectrum was 99.63 dB and the acquisition speed was 5.53 times that of the traditional method. As long as the quality of spectral recognition is ensured, this method can facilitate fast and lightweight acquisition of spectral information, which can technologically contribute to dynamic target measurement and rapid detection while improving the applicability of LCTF spectral imaging technology.
- liquid crystal tunable filter (LCTF),
- super-resolution,
- compressed sensing

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References(11)

References

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