基于DMD的近红外光谱仪的研究
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摘要
数字微镜器件(Digital Micromirror Device,DMD)作为一种新型的空间光调制器,具有分辨率高、生产成本低、加工效率高等优点,使用起来非常灵活,因此实验室搭建了基于DMD的近红外光谱仪。首先,介绍了DMD近红外光谱仪的基本工作原理。其次,对该光谱仪进行了波长标定,提出基于同一样品吸光度曲线相关系数的方法对其进行了波长台间差标准化,使得波长的台间差在理论上小于0.1 nm,在模型转移时符合要求。又通过在强光与弱光条件下对其噪声与信噪比的测试实验对比得出DMD近红外光谱仪不同编码模版的选择准则:在强光条件下扫描方法优于阿达玛方法,在弱光条件下相反。最后,利用该光谱仪对实际样品汽油和柴油进行检测,测试结果表明该光谱仪性能稳定。该DMD近红外光谱仪检测波长范围为1 330～2 500 nm,吸光度偏差小于等于0.000 4 AU。
As a new type of spatial light modulator, Digital Micromirror Device(DMD) has the advantages of high resolution, low production cost and high processing efficiency. It is very flexible to use, so the laboratory built a near infrared spectrometer based on DMD. First, the basic working principle of DMD near-infrared spectrometer was introduced. Secondly, the wavelength of spectrometer was calibrated, a method based on the correlation coefficient of the same sample absorbance curve was proposed to normalize the inter-wavelength difference, so that the inter-station difference of the wavelength was theoretically less than 0.1 nm, which meet the requirements when the model was transferred. The selection criteria of different coding templates for DMD near-infrared spectrometer were obtained by comparing the noise and signal-to-noise ratio test under strong light and weak light conditions: the scanning method was better than the Hadamard method under strong light conditions, the opposite in weak light. Finally, the actual sample gasoline and diesel were tested by the spectrometer, and the test results showed that the spectrometer performance was stable. The near-infrared spectrometer based on DMD has a detection wavelength range of 1 330 to 2 500 nm, absorbance deviation is less than 0.000 4 AU.
As a new type of spatial light modulator, Digital Micromirror Device(DMD) has the advantages of high resolution, low production cost and high processing efficiency. It is very flexible to use, so the laboratory built a near infrared spectrometer based on DMD. First, the basic working principle of DMD near-infrared spectrometer was introduced. Secondly, the wavelength of spectrometer was calibrated, a method based on the correlation coefficient of the same sample absorbance curve was proposed to normalize the inter-wavelength difference, so that the inter-station difference of the wavelength was theoretically less than 0.1 nm, which meet the requirements when the model was transferred. The selection criteria of different coding templates for DMD near-infrared spectrometer were obtained by comparing the noise and signal-to-noise ratio test under strong light and weak light conditions: the scanning method was better than the Hadamard method under strong light conditions, the opposite in weak light. Finally, the actual sample gasoline and diesel were tested by the spectrometer, and the test results showed that the spectrometer performance was stable. The near-infrared spectrometer based on DMD has a detection wavelength range of 1 330 to 2 500 nm, absorbance deviation is less than 0.000 4 AU.
引文
[1] Xu J L, Liu H, Lin C B, et al. SNR analysis and hadamard mask modification of DMD hadamard transform nearinfrared spectrometer[J]. Optics Communications, 2017, 383:250-254.
[2] Quan X Q, Liu H, Lu Z W, et al. Correction and analysis of noise in Hadamard transform spectrometerwith digital micro-mirror device and double sub-gratings[J]. Optics Communications, 2016, 359:95-101.
[3] Dong Xiang. Advances in near-infrared glucose monitoring using purecomponent selectivity analysis for model characterization and a novel digital micro-mirror array spectrometer[D]. Iowa City:University of Iowa, 2006.
[4] Xiang D, Arnold M A. Solid-state digital micro-mirror array spectrometer for hadamard transform measurements of glucose and lactate in aqueous solutions[J]. Applied Spectroscopy, 2011, 65(10):1170.
[5] Joo Young Choi. Advancing solid-state near-infrare dspectros copy for clinical measurements of glucose and urea[D].Iowa City:University of Iowa, 2012.
[6] Rose B. Programmable spectroscopy enabled by DLP[C]//International Society for Optics and Photonics, SPIE Opto,2015:93760I.
[7] Pruett E. Latest developments in Texas Instruments DLP nearinfrared spectrometers enable the next generation of embedded compact, portable systems[C]//SPIE, 2015, 9482:94820C.
[8] Gao Lingxiao, Zhang Zhihai, Zhang Wenkai. Noiseimprovement of complementary S matrixuesd in DMD spectrometer[J]. Infrared and Laser Engineering, 2013, 42(11):3082-3086.(in Chinese)高玲肖,张智海,张文凯.互补S矩阵在DMD光谱仪中噪声改善的研究[J].红外与激光工程, 2013, 42(11):3082-3086.
[9] Yang Minzhu, Zhou Yaopu, Zhang Lei, et al. Nonlinear effects of the Fourier transform spectrometerdetector and itscorrection[J]. Infrared and Laser Engineering, 2017, 46(10):1023001.(in Chinese)杨敏珠,邹曜璞,张磊,等.傅里叶变换光谱仪探测器非线性的影响及其校正方法[J].红外与激光工程, 2017, 46(10):1023001.
[10] Wang Xiaoduo, Liu Hua, Lu Zhenwu, et al. Design of a spectrum-folded Hadamard transform spectrometer in nearinfrared band[J]. Optics Communications, 2014, 333:80-83.
[11] Quan X D, Liu H, Lu Z W, et al. Correction and analysis of noise in Hadamard transform spectrometer with digital micro-mirror device and double sub-gratings[J]. Optics Communications, 2016, 359:95-101.
[12] Quan X Q, Liu H, Lu Z W, et al. Design of stray light suppressed digital micromirror device-based spectrometer with compound parabolic concentrator[J]. Optical Engineering,2015, 54(11):115101.
[13] Xu Jialin. Research on the Key Technologies of Hadamard Transform Near-infrared Spectrometer based on DMD[D].Changchun:Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 2017.(in Chinese)许家林.基于DMD的阿达玛变换近红外光谱仪关键技术研究[D].长春:中国科学院长春光学精密机械与物理研究所, 2017.
[2] Quan X Q, Liu H, Lu Z W, et al. Correction and analysis of noise in Hadamard transform spectrometerwith digital micro-mirror device and double sub-gratings[J]. Optics Communications, 2016, 359:95-101.
[3] Dong Xiang. Advances in near-infrared glucose monitoring using purecomponent selectivity analysis for model characterization and a novel digital micro-mirror array spectrometer[D]. Iowa City:University of Iowa, 2006.
[4] Xiang D, Arnold M A. Solid-state digital micro-mirror array spectrometer for hadamard transform measurements of glucose and lactate in aqueous solutions[J]. Applied Spectroscopy, 2011, 65(10):1170.
[5] Joo Young Choi. Advancing solid-state near-infrare dspectros copy for clinical measurements of glucose and urea[D].Iowa City:University of Iowa, 2012.
[6] Rose B. Programmable spectroscopy enabled by DLP[C]//International Society for Optics and Photonics, SPIE Opto,2015:93760I.
[7] Pruett E. Latest developments in Texas Instruments DLP nearinfrared spectrometers enable the next generation of embedded compact, portable systems[C]//SPIE, 2015, 9482:94820C.
[8] Gao Lingxiao, Zhang Zhihai, Zhang Wenkai. Noiseimprovement of complementary S matrixuesd in DMD spectrometer[J]. Infrared and Laser Engineering, 2013, 42(11):3082-3086.(in Chinese)高玲肖,张智海,张文凯.互补S矩阵在DMD光谱仪中噪声改善的研究[J].红外与激光工程, 2013, 42(11):3082-3086.
[9] Yang Minzhu, Zhou Yaopu, Zhang Lei, et al. Nonlinear effects of the Fourier transform spectrometerdetector and itscorrection[J]. Infrared and Laser Engineering, 2017, 46(10):1023001.(in Chinese)杨敏珠,邹曜璞,张磊,等.傅里叶变换光谱仪探测器非线性的影响及其校正方法[J].红外与激光工程, 2017, 46(10):1023001.
[10] Wang Xiaoduo, Liu Hua, Lu Zhenwu, et al. Design of a spectrum-folded Hadamard transform spectrometer in nearinfrared band[J]. Optics Communications, 2014, 333:80-83.
[11] Quan X D, Liu H, Lu Z W, et al. Correction and analysis of noise in Hadamard transform spectrometer with digital micro-mirror device and double sub-gratings[J]. Optics Communications, 2016, 359:95-101.
[12] Quan X Q, Liu H, Lu Z W, et al. Design of stray light suppressed digital micromirror device-based spectrometer with compound parabolic concentrator[J]. Optical Engineering,2015, 54(11):115101.
[13] Xu Jialin. Research on the Key Technologies of Hadamard Transform Near-infrared Spectrometer based on DMD[D].Changchun:Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 2017.(in Chinese)许家林.基于DMD的阿达玛变换近红外光谱仪关键技术研究[D].长春:中国科学院长春光学精密机械与物理研究所, 2017.