Prof. Kexin Xu Profile

Prof. Kexin Xu

Professor at Tianjin University

SPIE Involvement:

Author | Editor

Publications (106)

Proceedings Article | 20 November 2024 Paper

Innovative near-infrared detector and wearable solution for stable noninvasive blood glucose monitoring

Qing Ge, Jin Liu, Kexin Xu, Rong Liu, Wenbo Liu, Yue Lu, Tongshuai Han

Proceedings Volume 13242, 132421C (2024) https://doi.org/10.1117/12.3030370

KEYWORDS: Sensors, Glucose, Absorbance, Blood, Signal detection, Skin, Incident light, In vivo imaging, Light sources, Simulations

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Proceedings Article | 20 February 2019 Presentation + Paper

An optimized non-invasive glucose sensing based on scattering and absorption separating using near-infrared spectroscopy

Tongshuai Han, Xueyu Liu, Jin Liu, Kexin Xu

Proceedings Volume 10885, 108850S (2019) https://doi.org/10.1117/12.2507600

KEYWORDS: Glucose, Absorption, Skin, Signal attenuation, Blood, Scattering, Monte Carlo methods, Light scattering, Near infrared spectroscopy, Diffusion

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Proceedings Article | 20 February 2019 Paper

Temperature near-infrared absorption spectrum monitoring for in vivo tissue based on a new scattering-independent measurement

Jin Liu, Lingxing Guo, Xueyu Liu, Tongshuai Han, Kexin Xu

Proceedings Volume 10885, 108850X (2019) https://doi.org/10.1117/12.2508111

KEYWORDS: Absorption, Tissues, Scattering, Signal attenuation, Temperature metrology, Skin, In vivo imaging, Monte Carlo methods, Optical fibers, Tissue optics

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SPIE Journal Paper | 5 July 2017 Open Access

Floating reference position-based correction method for near-infrared spectroscopy in long-term glucose concentration monitoring

Guang Han, Tongshuai Han, Kexin Xu, Jin Liu

JBO, Vol. 22, Issue 07, 077001, (July 2017) https://doi.org/10.1117/12.10.1117/1.JBO.22.7.077001

KEYWORDS: Glucose, Fiber reinforced polymers, Magnesium, Sensors, Roentgenium, Near infrared spectroscopy, Light sources, Light, Near infrared, Scattering

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Proceedings Article | 3 March 2017 Paper

Experimental study on the influence of the contact pressure to transmittance and reflectance spectra by near infrared spectroscopy

Jingying Jiang, Si Li, Tianpei Wang, Lin Li, Jiajia Liu, Kexin Xu

Proceedings Volume 10063, 100631E (2017) https://doi.org/10.1117/12.2251355

KEYWORDS: Reflectivity, Transmittance, Tissue optics, Near infrared spectroscopy, Skin, Blood, Glucose, Near infrared, Tissues, Functional imaging, Optical fibers, Light sources

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Proceedings Article | 3 March 2017 Paper

Influence of earlobe thickness on near infrared spectroscopy

Jingying Jiang, Tianpei Wang, Si Li, Lin Li, Jiajia Liu, Kexin Xu

Proceedings Volume 10063, 100631D (2017) https://doi.org/10.1117/12.2251327

KEYWORDS: Signal detection, Near infrared spectroscopy, Transmittance, Reflectivity, Glucose, Near infrared, Spectroscopy, Absorption, Skin

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Proceedings Article | 31 October 2016 Paper

Determination of the reference position in the near-infrared non-invasive blood glucose measurement in vivo

Guang Han, Jin Liu, Rong Liu, Kexin Xu

Proceedings Volume 10024, 100242S (2016) https://doi.org/10.1117/12.2245908

KEYWORDS: Glucose, Blood, In vivo imaging, Spectroscopy, Skin, Calibration, Light sources, Sensors, Optical fibers, Near infrared spectroscopy

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Proceedings Article | 17 March 2016 Paper

Experimental study on synergistic effects of reflectance and transmittance for near infrared spectroscopy

Jingying Jiang, Jiajia Liu, Congcong Ma, Lin Li, Junsheng Lu, Kexin Xu

Proceedings Volume 9707, 970714 (2016) https://doi.org/10.1117/12.2209071

KEYWORDS: Reflectivity, Transmittance, Glucose, Near infrared spectroscopy, Data processing, Signal detection, Signal to noise ratio, Absorption, Blood, Environmental sensing

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Proceedings Article | 17 March 2016 Paper

Monte Carlo simulation study on the availability of the floating-reference theory to diffused transmittance spectra

Jingying Jiang, Lin Li, Congcong Ma, Jiajia Liu, Junsheng Lu, Kexin Xu

Proceedings Volume 9707, 970715 (2016) https://doi.org/10.1117/12.2209081

KEYWORDS: Monte Carlo methods, Transmittance, Reflectivity, Glucose, Tissues, Near infrared spectroscopy, Environmental sensing, Blood, Near infrared, Spectroscopy, Skin, Tissue optics, Absorption

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Proceedings Article | 5 March 2015 Paper

SIFT-based error compensation for ear feature matching and recognition system

Jingying Jiang, Qi Zhang, Congcong Ma, Junsheng Lu, Kexin Xu

Proceedings Volume 9322, 932210 (2015) https://doi.org/10.1117/12.2077969

KEYWORDS: Ear, Detection and tracking algorithms, Light sources and illumination, Image enhancement, Image processing, Biometrics, Imaging systems, Cameras, Biomedical optics, Image acquisition

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Proceedings Article | 5 March 2015 Paper

Quantitative analyses of spectral measurement error based on Monte-Carlo simulation

Jingying Jiang, Congcong Ma, Qi Zhang, Junsheng Lu, Kexin Xu

Proceedings Volume 9322, 93220Z (2015) https://doi.org/10.1117/12.2076549

KEYWORDS: Monte Carlo methods, Error analysis, Analytical research, Glucose, Quantitative analysis, Device simulation, Photons, Biomedical optics, Spectroscopes, Computer simulations

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Proceedings Article | 4 March 2014 Paper

Quantitative analysis of melamine by multi-way partial least squares model with two-dimensional near-infrared correlation spectroscopy

Renjie Yang, Rong Liu, Kexin Xu, Yanrong Yang

Proceedings Volume 8939, 893912 (2014) https://doi.org/10.1117/12.2035925

KEYWORDS: Spectroscopy, Near infrared, Statistical modeling, Near infrared spectroscopy, Calibration, Quantitative analysis, Transmittance, Data modeling, Error analysis, Mathematical modeling

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Proceedings Article | 26 February 2014 Paper

Monte Carlo simulation on the effect of contact pressure on in vivo NIRS measurement

Jingying Jiang, Junsheng Lu, Hao Zhang, Xuzheng Rong, Zhenhe Ma, Kexin Xu

Proceedings Volume 8942, 89420Y (2014) https://doi.org/10.1117/12.2036891

KEYWORDS: Skin, Transmittance, Scattering, Reflectivity, Glucose, Monte Carlo methods, Tissue optics, Near infrared spectroscopy, Tissues, Blood

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Proceedings Article | 26 February 2014 Paper

Ear feature region detection based on a combined image segmentation algorithm-KRM

Jingying Jiang, Hao Zhang, Qi Zhang, Junsheng Lu, Zhenhe Ma, Kexin Xu

Proceedings Volume 8942, 89420Z (2014) https://doi.org/10.1117/12.2036893

KEYWORDS: Ear, Image segmentation, Image processing algorithms and systems, Detection and tracking algorithms, Feature extraction, Image processing, Image filtering, Target recognition, Target detection, Biomedical optics

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Proceedings Article | 12 April 2013 Paper

Continuous detection of glucose concentration by fluorescent indicator

Ting Shi, Dachao Li, Guoqing Li, Lou Lu, Kexin Xu

Proceedings Volume 8598, 85980M (2013) https://doi.org/10.1117/12.2005782

KEYWORDS: Glucose, Polymers, Molecules, Blood, Polymeric sensors, Sensors, Magnesium, Luminescence, Glasses, Biosensors

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Proceedings Article | 22 March 2013 Paper

Glucose measurement in interstitial fluid by microdialysis for the calibration of minimally invasive blood glucose monitoring

Dachao Li, Ridong Wang, Hao Chong, Yu Liu, Kexin Xu

Proceedings Volume 8572, 857219 (2013) https://doi.org/10.1117/12.2003853

KEYWORDS: Glucose, Microfluidics, Calibration, Blood, Sensors, In vivo imaging, Temperature metrology, In vitro testing, Diffusion, Switches

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Proceedings Article | 22 March 2013 Paper

The effect of borate polymer layers on glucose measurement by surface plasmon resonance

Dachao Li, Jia Yang, Peng Wu, Di Yang, Bo Wang, Yuan Lin, Kexin Xu

Proceedings Volume 8572, 85721D (2013) https://doi.org/10.1117/12.2003508

KEYWORDS: Glucose, Sensors, Polymers, Polymeric sensors, Surface plasmons, Gold, Nitrogen, Blood, Polymer thin films, Prisms

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Proceedings Article | 20 March 2013 Paper

Measurement of glucose concentration by fiber-optic surface plasmon resonance sensor

Dachao Li, Rui Zhu, Peng Wu, Jianwei Wu, Kexin Xu

Proceedings Volume 8576, 85760X (2013) https://doi.org/10.1117/12.2003454

KEYWORDS: Glucose, Sensors, Blood, Coating, Gold, Surface plasmons, Optical fibers, Reflectivity, Chromium, Fiber optics

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Proceedings Article | 11 March 2013 Paper

A distinguishing method of different petrol by fiber-optic surface plasmon resonance sensor

Dachao Li, Rui Zhu, Peng Wu, Kai Pang, Jianwei Wu, Zhoumo Zeng, Kexin Xu

Proceedings Volume 8621, 86211N (2013) https://doi.org/10.1117/12.2005523

KEYWORDS: Sensors, Reflectivity, Gold, Chromium, Reflection, Coating, Surface plasmons, Fiber optics sensors, Refractive index, Fiber optics

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Proceedings Article | 9 March 2013 Paper

A portable instrument for continuous glucose monitoring by the integration of microfluidic chip and micro-glucose sensor

Dachao Li, Yongjie Ji, Wenshuai Liang, Xiaoli Zhang, Haixia Yu, Kexin Xu

Proceedings Volume 8615, 861519 (2013) https://doi.org/10.1117/12.2003535

KEYWORDS: Glucose, Sensors, Skin, Microfluidics, Ultrasonography, Interfaces, Electrodes, Analog electronics, Telecommunications, Polymers

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Proceedings Article | 1 March 2013 Paper

A device to improve the SNR of the measurement of the positional floating reference point

Jingying Jiang, Xuzheng Rong, Hao Zhang, Kexin Xu

Proceedings Volume 8580, 858019 (2013) https://doi.org/10.1117/12.2001764

KEYWORDS: Signal to noise ratio, Optical fibers, Light sources, Diffuse reflectance spectroscopy, Glucose, Near infrared spectroscopy, Computing systems, Blood, Interference (communication), Sensors

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Proceedings Article | 1 March 2013 Paper

Computer vision localization-based in vivo measurement by NIR spectroscopy

Jingying Jiang, Hao Zhang, XuZheng Rong, Kexin Xu

Proceedings Volume 8580, 85801A (2013) https://doi.org/10.1117/12.2001771

KEYWORDS: Near infrared spectroscopy, Computer vision technology, In vivo imaging, Machine vision, Near infrared, Spectroscopy, Tissues, Image processing, Optical sensors, Skin

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Proceedings Article | 1 March 2013 Paper

Simulation on how to customize glucose adjustment method for non-invasive blood glucose sensing by NIRS

Xiaolin Min, Jingying Jiang, Da Zou, Rong Liu, Kexin Xu

Proceedings Volume 8580, 85801B (2013) https://doi.org/10.1117/12.2001775

KEYWORDS: Glucose, Blood, Monte Carlo methods, Mathematical modeling, Near infrared spectroscopy, Data modeling, Stomach, Mode conditioning cables, Statistical modeling, Matrices

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Proceedings Article | 1 March 2013 Paper

Monte Carlo simulation on the effect of dermal thickness variances on noninvasive blood glucose sensing

Jingying Jiang, Da Zou, Xiaolin Min, Zhenhe Ma, Kexin Xu

Proceedings Volume 8580, 85801C (2013) https://doi.org/10.1117/12.2001777

KEYWORDS: Glucose, Blood, Skin, Monte Carlo methods, Natural surfaces, Tissue optics, Ultrasonics, Photons, Reflection, Near infrared spectroscopy

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Proceedings Article | 25 February 2013 Paper

Tunable mid-infrared laser spectroscopy based on fiber-optic sensor for glucose measurement

Songlin Yu, Dachao Li, Hao Chong, Changyue Sun, Kexin Xu

Proceedings Volume 8591, 85910K (2013) https://doi.org/10.1117/12.2002781

KEYWORDS: Glucose, Fiber optics sensors, Spectroscopy, Sensors, Carbon dioxide lasers, Laser spectroscopy, Absorbance, Mid-IR, Fiber optics, FT-IR spectroscopy

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Proceedings Article | 25 February 2013 Paper

Glucose measurement by surface plasmon resonance with borate polymer binding

Dachao Li, Jia Yang, Peng Wu, Di Yang, Bo Wang, Yuan Lin, Kexin Xu

Proceedings Volume 8591, 85910P (2013) https://doi.org/10.1117/12.2003468

KEYWORDS: Glucose, Polymers, Sensors, Surface plasmons, Polymeric sensors, Gold, Blood, Molecules, Polymer thin films, Nitrogen

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SPIE Journal Paper | 6 June 2012 Open Access

Joint derivation method for determining optical properties based on steady-state spatially resolved diffuse reflectance measurement at small source-detector separations and large reduced albedo range: theory and simulation

Zhenzhi Shi, Ying Fan, Huijuan Zhao, Kexin Xu

JBO, Vol. 17, Issue 06, 067004, (June 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.6.067004

KEYWORDS: Optical properties, Diffuse reflectance spectroscopy, Scattering, Absorption, Tissues, Monte Carlo methods, Diffusion, Statistical modeling, Biomedical optics, Inverse problems

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Proceedings Article | 28 February 2012 Paper

Modeling of relationship between glucose concentration in blood and glucose concentration in interstitial fluid

Ting Shi, Dachao Li, Yongjie Ji, Guoqing Li, Kexin Xu

Proceedings Volume 8215, 82150U (2012) https://doi.org/10.1117/12.907733

KEYWORDS: Glucose, Blood, Molecules, Tissues, Skin, Mathematical modeling, Veins, Sensors, Diagnostics, Plasma

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Proceedings Article | 9 February 2012 Paper

Quantitative influence of cholesterol on non-invasive blood glucose sensing studied with NIR spectroscopy

Jingying Jiang, Lingling Zhang, Kai Zhang, Kexin Xu

Proceedings Volume 8222, 822217 (2012) https://doi.org/10.1117/12.906504

KEYWORDS: Glucose, Data modeling, Blood, Near infrared spectroscopy, Near infrared, Spectroscopy, Transmittance, Error analysis, Collimation, Absorbance

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Proceedings Article | 9 February 2012 Paper

Influence of hemoglobin on non-invasive optical bilirubin sensing

Jingying Jiang, Qiliang Gong, Da Zou, Kexin Xu

Proceedings Volume 8222, 822218 (2012) https://doi.org/10.1117/12.906509

KEYWORDS: Data modeling, Absorption, Optical sensing, Chemical analysis, Biomedical optics, Mode conditioning cables, Blood, Absorbance, Skin, Error analysis

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Proceedings Article | 9 February 2012 Paper

Mathematical modeling on experimental protocol of glucose adjustment for non-invasive blood glucose sensing

Jingying Jiang, Xiaolin Min, Da Zou, Kexin Xu

Proceedings Volume 8222, 822215 (2012) https://doi.org/10.1117/12.905941

KEYWORDS: Glucose, Blood, Mathematical modeling, Data modeling, Mode conditioning cables, Brain-machine interfaces, Integrated modeling, Absorption, Radium, Stomach

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Proceedings Article | 9 February 2012 Paper

Investigation on how to choose measurement sites for non-invasive near-infrared blood glucose sensing

Jingying Jiang, Da Zou, Xiaolin Min, Zhenhe Ma, Kexin Xu

Proceedings Volume 8222, 822216 (2012) https://doi.org/10.1117/12.905944

KEYWORDS: Ear, Glucose, Blood, Skin, Optical coherence tomography, Reflectivity, Absorbance, Spectroscopy, Capillaries, Neodymium

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Proceedings Article | 3 February 2012 Paper

Determination of melamine of milk based on two-dimensional correlation infrared spectroscopy

Ren-jie Yang, Rong Liu, Kexin Xu

Proceedings Volume 8229, 822918 (2012) https://doi.org/10.1117/12.904014

KEYWORDS: Spectroscopy, Infrared spectroscopy, Near infrared, FT-IR spectroscopy, Near infrared spectroscopy, Wavelets, Absorbance, Temperature metrology, Sensors, Mid-IR

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Proceedings Article | 3 February 2012 Paper

Effect on glucose monitoring of pressure exerted by fiber-optic probe: skin model and simulation

Chenxi Li, Huijuan Zhao, Zhenzhi Shi, Kexin Xu

Proceedings Volume 8229, 82291H (2012) https://doi.org/10.1117/12.907340

KEYWORDS: Skin, Tissue optics, Tissues, Scattering, Fiber optics, Absorption, Monte Carlo methods, Water, Optical properties, Reflectivity

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Proceedings Article | 3 February 2012 Paper

Study of specificity for noninvasive glucose measurements based on two-dimensional correlation mid-infrared spectroscopy

Yuzhen Cao, Wen Zhang, Rong Liu, Wanjie Zhang, Kexin Xu

Proceedings Volume 8229, 82291B (2012) https://doi.org/10.1117/12.907858

KEYWORDS: Glucose, Spectroscopy, Blood, Absorption, Mid-IR, In vitro testing, In vivo imaging, Attenuated total reflectance, Signal detection, Spectroscopes

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Proceedings Article | 30 January 2012 Paper

An implantable fiber-optic surface plasmon resonance glucose sensor based on LPFG

Dachao Li, Rui Zhu, Peng Wu, Jia Yang, Kexin Xu

Proceedings Volume 8218, 82180Z (2012) https://doi.org/10.1117/12.907239

KEYWORDS: Sensors, Fiber optics sensors, Glucose, Gold, Fiber optics, Surface plasmons, Blood, Modulation, Temperature metrology, Cladding

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SPIE Journal Paper | 1 October 2011 Open Access

Hybrid diffusion-P3 equation in N-layered turbid media: steady-state domain

Zhenzhi Shi, Huijuan Zhao, Kexin Xu

JBO, Vol. 16, Issue 10, 105002, (October 2011) https://doi.org/10.1117/12.10.1117/1.3640810

KEYWORDS: Diffusion, Absorption, Monte Carlo methods, Fourier transforms, Tissues, Optical properties, Scattering, Reflectivity, Solids, Biomedical optics

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Proceedings Article | 11 February 2011 Paper

Influence of cholesterol on non-invasive blood glucose sensing studied with NIR spectroscopy

Jingying Jiang, Lingling Zhang, Qiliang Gong, Kexin Xu

Proceedings Volume 7898, 789814 (2011) https://doi.org/10.1117/12.876191

KEYWORDS: Glucose, Blood, Near infrared spectroscopy, Near infrared, Absorbance, Spectroscopy, Absorption, Transmittance, Collimation, Data modeling

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Proceedings Article | 11 February 2011 Paper

Discriminant analysis of milk adulteration based on near-infrared spectroscopy and pattern recognition

Rong Liu, Guorong Lv, Bin He, Kexin Xu

Proceedings Volume 7906, 79060Y (2011) https://doi.org/10.1117/12.873260

KEYWORDS: Urea, Statistical modeling, Glucose, Near infrared spectroscopy, Pattern recognition, Seaborgium, Absorbance, Optimization (mathematics), Safety, Absorption

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Proceedings Article | 11 February 2011 Paper

An effective method based on reference point for glucose sensing at 1100-1600nm

Jiaxiang Zheng, Kexin Xu, Yue Yang

Proceedings Volume 7906, 79060X (2011) https://doi.org/10.1117/12.873045

KEYWORDS: Glucose, Diffuse reflectance spectroscopy, Monte Carlo methods, Calibration, Tissue optics, Signal detection, Blood, Statistical modeling, Scattering, Sensors

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Proceedings Article | 11 February 2011 Paper

Theoretical studies of floating-reference method for NIR blood glucose sensing

Zhenzhi Shi, Yue Yang, Huijuan Zhao, Wenliang Chen, Rong Liu, Kexin Xu

Proceedings Volume 7906, 79060W (2011) https://doi.org/10.1117/12.872271

KEYWORDS: Glucose, Monte Carlo methods, Diffusion, Absorption, Scattering, Near infrared, Tissue optics, Blood, Particles, Light scattering

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Proceedings Article | 10 February 2011 Paper

Monte Carlo simulation on how optical clearing technique influences predicting precision of non-invasive optical blood glucose sensing

Jingying Jiang, Wei Chen, Lingling Zhang, Ruikang Wang, Kexin Xu

Proceedings Volume 7898, 789810 (2011) https://doi.org/10.1117/12.874028

KEYWORDS: Glucose, Tissue optics, Monte Carlo methods, Optical clearing, Blood, Scattering, Skin, Tissues, Absorption, Light scattering

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Proceedings Article | 26 February 2010 Paper

Adulteration detection in milk using infrared spectroscopy combined with two-dimensional correlation analysis

Bin He, Rong Liu, Renjie Yang, Kexin Xu

Proceedings Volume 7572, 75720P (2010) https://doi.org/10.1117/12.841580

KEYWORDS: Urea, Spectroscopy, Glucose, FT-IR spectroscopy, Absorbance, Infrared spectroscopy, Absorption, Databases, Nondestructive evaluation, Safety

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Proceedings Article | 26 February 2010 Paper

Research on the spectroscopy of turbid media with optical-length resolved detection

Zhenhui Du, Chenxi Li, Feng Chen, Wenliang Chen, Kexin Xu

Proceedings Volume 7572, 75720H (2010) https://doi.org/10.1117/12.841230

KEYWORDS: Modulation, Light scattering, Laser scattering, Tissue optics, Beam splitters, Photons, Scattering, Water, Signal detection, Analytical research

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Proceedings Article | 23 February 2010 Paper

Study on optical clearing effects by using tissue-like phantom

Jingying Jiang, Wei Chen, Qiliang Gong, Ruikang Wang, Kexin Xu

Proceedings Volume 7563, 75630P (2010) https://doi.org/10.1117/12.841490

KEYWORDS: Tissue optics, Optical clearing, Tissues, Optical properties, Scattering, Light scattering, Skin, Signal attenuation, Absorption, Transmittance

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Proceedings Article | 23 February 2010 Paper

Analysis and modification of estimate error in optical properties measurement with the double-integrating-spheres system

Chenxi Li, Qiuyin Wang, Zhenzhi Shi, Yunhan Luo, Huijuan Zhao, Kexin Xu

Proceedings Volume 7563, 75630O (2010) https://doi.org/10.1117/12.841268

KEYWORDS: Optical spheres, Reflectivity, Optical properties, Distributed interactive simulations, Transmittance, Absorption, Error analysis, Monte Carlo methods, Optical testing, Tissue optics

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Proceedings Article | 25 February 2009 Paper

Typical application of skin diffusion optical model to quantitative description of tissue optical properties

Wei Chen, Jingying Jiang, Wenjun Zhang, Ruikang Wang, Kexin Xu

Proceedings Volume 7176, 71760L (2009) https://doi.org/10.1117/12.807784

KEYWORDS: Skin, Tissue optics, Diffusion, Optical properties, Scattering, Light scattering, Monte Carlo methods, Tissues, Optical clearing, Transmittance

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Proceedings Article | 20 February 2009 Paper

Influence of skin tissue properties on the radial reference point for glucose measurement

Yue Yang, Kexin Xu, Lijun Ding, Zhenzhi Shi, Wenliang Chen

Proceedings Volume 7186, 71860N (2009) https://doi.org/10.1117/12.808693

KEYWORDS: Glucose, Skin, Tissue optics, Diffuse reflectance spectroscopy, Scattering, Blood, Light scattering, Tissues, Light sources, Absorption

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Proceedings Article | 20 February 2009 Paper

Data correction method based on the floating reference point for the noninvasive glucose sensing

Rong Liu, Bin He, Kexin Xu, Yue Yang

Proceedings Volume 7186, 71860O (2009) https://doi.org/10.1117/12.808738

KEYWORDS: Glucose, Monte Carlo methods, Diffuse reflectance spectroscopy, Absorption, Scattering, Water, Data corrections, In vitro testing, Single photon emission computed tomography, Interference (communication)

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Proceedings Article | 12 February 2009 Paper

Fast inverse Monte Carlo simulation for extracting the optical properties of cylindrical tissue

Huijuan Zhao, Xiaoqing Zhou, Hao Li, Jierong Ma, Kexin Xu

Proceedings Volume 7174, 71741P (2009) https://doi.org/10.1117/12.807580

KEYWORDS: Optical properties, Tissue optics, Monte Carlo methods, Databases, Reconstruction algorithms, Scattering, Near infrared, Absorption, Cervix, Tissues

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Proceedings Article | 12 February 2009 Paper

Improved double-integrating-spheres system for multiwavelength optical properties measurement: investigation and application

Chenxi Li, Huijuan Zhao, Jierong Ma, Julan Liang, Kexin Xu

Proceedings Volume 7176, 71760J (2009) https://doi.org/10.1117/12.807582

KEYWORDS: Optical properties, Optical testing, Scattering, Tissue optics, Optical spheres, Reflectivity, Refractive index, Absorption, In vitro testing, Modulation

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Proceedings Article | 12 February 2009 Paper

Potential application of Chinese traditional medicine (CTM) as enhancer for tissue optical clearing

Wei Chen, Jingying Jiang, Ruikang Wang, Kexin Xu

Proceedings Volume 7176, 71760K (2009) https://doi.org/10.1117/12.807783

KEYWORDS: Skin, Tissue optics, Optical clearing, Transmittance, Scattering, Tissues, Medicine, Absorption, Optical properties, Light scattering

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Proceedings Article | 13 October 2008 Paper

Investigation on reference value error in multivariate calibration

Qingbo Li, Guangjun Zhang, Xiang Li, Kexin Xu, Yan Wang

Proceedings Volume 7128, 712812 (2008) https://doi.org/10.1117/12.806627

KEYWORDS: Calibration, Error analysis, Statistical modeling, Glucose, Thermal modeling, Statistical analysis, Instrument modeling, Near infrared, Spectral calibration, Systems modeling

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Near infrared spectral analysis is a kind of indirect measuring technology, that is, calibration model is established by using sample spectra and the reference value of the interested concentration, and then predict the interested concentration of the unknown sample by using its spectrum and calibration model. Generally, the quality of calibration model is evaluated by the deviation between the predicted value and the reference value of the measured concentration. Reference value measurement error of the calibration set samples and model error are the main error source of multivariate calibration. When there was reference value measurement error, the regression model would cause great prediction deviation. However in practical application, apparent prediction error caused by reference value measurement error is always considered as the faultiness of calibration model. So it is falsely regarded that the prediction error of multivariate calibration model would be greater than that of reference method. In this paper, effect of reference value measurement error on prediction error was analyzed, and the relationship among apparent prediction error, actual prediction error and reference value measurement error was discussed. At the same time, the applicability and rationality of a computation formula was also discussed, which could estimate the true prediction error in a more precise way. It was proved that the prediction accuracy of an excellent calibration model was greater than that of the reference method by analyzing the reference value measurement error. An experiment of glucose aqueous solution samples was given in this paper. In this example, the effect of reference value measurement error on the prediction error of multivariate calibration model was investigated, and the estimating formula of the corrected prediction error was evaluated. The conclusion could be universally applied to not only multivariate calibration MLR, PCR, PLS and so on, but also in much more complex samples.

Proceedings Article | 22 February 2008 Paper

Influence of temperature on the precision of noninvasive glucose sensing by near-infrared spectroscopy

Rong Liu, Wenliang Chen, Yun Chen, Kexin Xu

Proceedings Volume 6863, 68630Q (2008) https://doi.org/10.1117/12.762152

KEYWORDS: Glucose, Temperature metrology, Diffuse reflectance spectroscopy, Monte Carlo methods, Absorbance, Blood, Tissue optics, Near infrared spectroscopy, Spectroscopy, Transmittance

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Proceedings Article | 22 February 2008 Paper

Determination of glucose in interstitial fluid by surface plasmon resonance biosensor

Fuxiang Huang, Jin Liu, Haixia Yu, Zengfu Zhang, Dachao Li, Kexin Xu

Proceedings Volume 6863, 68630M (2008) https://doi.org/10.1117/12.760894

KEYWORDS: Glucose, Sensors, Proteins, Biosensors, Surface plasmons, Skin, Ultrasonography, Cavitation, Blood, Refractive index

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Proceedings Article | 22 February 2008 Paper

The wavelength-dependent characteristic of the floating-reference point in the non-invasive glucose sensing

Rong Liu, Wenliang Chen, Yue Yang, Yu Li, Kexin Xu

Proceedings Volume 6863, 68630R (2008) https://doi.org/10.1117/12.762156

KEYWORDS: Glucose, Absorption, Skin, Reflectivity, Scattering, Monte Carlo methods, Diffuse reflectance spectroscopy, Water, Tissues, Tissue optics

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Proceedings Article | 22 February 2008 Paper

Using skin impedance to improve prediction accuracy of continuous glucose monitoring system

Haixia Yu, Jin Liu, Ting Shi, Dachao Li, Zhenhui Du, Kexin Xu

Proceedings Volume 6863, 68630S (2008) https://doi.org/10.1117/12.762154

KEYWORDS: Skin, Glucose, Blood, Electrodes, Ultrasonography, Ultrasonics, Molecules, Biosensors, Control systems, Resistance

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Proceedings Article | 15 February 2008 Paper

Availability of thiazone as an enhancer for optical clearing of skin tissue in vitro

Jingying Jiang, Wei Chen, Ruikang Wang, Kexin Xu

Proceedings Volume 6858, 68580N (2008) https://doi.org/10.1117/12.762194

KEYWORDS: Skin, Tissue optics, Optical clearing, Tissues, In vitro testing, Optical properties, Scattering, Transmittance, Absorption, Chemical analysis

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Proceedings Article | 8 January 2008 Paper

The influence of experiment design on the model precision in the noninvasive glucose sensing by near-infrared spectroscopy

Rong Liu, Wenliang Chen, Kexin Xu

Proceedings Volume 6826, 682626 (2008) https://doi.org/10.1117/12.755608

KEYWORDS: Glucose, Blood, Temperature metrology, Near infrared spectroscopy, Error analysis, In vivo imaging, Calibration, Tolerancing, Spectroscopy, Near infrared

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Proceedings Article | 8 January 2008 Paper

Progress on noninvasive and minimally invasive methods on transcutaneous blood glucose sensing

Kexin Xu, Rong Liu, Jin Liu, Wenliang Chen, Dachao Li, Zhenhui Du

Proceedings Volume 6826, 682616 (2008) https://doi.org/10.1117/12.760307

KEYWORDS: Glucose, Skin, Blood, Proteins, Near infrared spectroscopy, Sensors, Ultrasonography, Ultrasonics, Interference (communication), Signal processing

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Proceedings Article | 14 February 2007 Paper

Applying the floating-reference method to improve the precision of noninvasive blood glucose measurement

Wenliang Chen, Zhen Ma, Lin An, Kexin Xu

Proceedings Volume 6445, 64450M (2007) https://doi.org/10.1117/12.699501

KEYWORDS: Glucose, Blood, Diffuse reflectance spectroscopy, Monte Carlo methods, Skin, Data processing, Tissue optics, Light, Scattering, Signal processing

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Proceedings Article | 14 February 2007 Paper

Methodology of effective glucose-specific signal extraction in complicated sample

Wenliang Chen, Bin Deng, Rong Liu, Xiaoyu Gu, Kexin Xu

Proceedings Volume 6445, 64450L (2007) https://doi.org/10.1117/12.699496

KEYWORDS: Glucose, Absorption, Calibration, Signal detection, Blood, Absorbance, Statistical analysis, Interference (communication), Data processing, Molecules

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Proceedings Article | 14 February 2007 Paper

Prediction of blood glucose using interstitial fluid extracted by ultrasound and vacuum

Dachao Li, Haixia Yu, Xian Huang, Fuxiang Huang, Xiaotang Hu, Kexin Xu

Proceedings Volume 6445, 64450I (2007) https://doi.org/10.1117/12.699691

KEYWORDS: Glucose, Blood, Skin, Ultrasonography, Error analysis, Sensors, Ultrasonics, Control systems, Data analysis, Prototyping

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Proceedings Article | 8 February 2007 Paper

Controlling optical properties of bio-tissue by the use of biocompatible hyperosmotic agents

Jingying Jiang, Ruikang Wang, Kexin Xu

Proceedings Volume 6439, 64390F (2007) https://doi.org/10.1117/12.700585

KEYWORDS: Skin, Tissue optics, Scattering, Tissues, Optical properties, Absorption, Anisotropy, Optical clearing, Refractive index, Light scattering

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Proceedings Article | 29 January 2007 Paper

Research and fabrication of integrated bio-sensor for blood analysis based on uTAS

De En, Jianxia Wei, Zhengrong Tong, Caihe Chen, Yuming Cui, Kexin Xu, Qin Si, Chao Li, Jie Liu

Proceedings Volume 6279, 62795Y (2007) https://doi.org/10.1117/12.725485

KEYWORDS: Blood, Electrodes, Biosensors, Biological research, Gold, Glucose, Etching, Analytical research, Sensors, Glasses

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Proceedings Article | 27 October 2006 Paper

Fundamentals and developments of biological tissue optical clearing

Jingying Jiang, Kexin Xu

Proceedings Volume 6047, 604744 (2006) https://doi.org/10.1117/12.710978

KEYWORDS: Tissue optics, Skin, Optical clearing, Scattering, Tissues, Light scattering, Refractive index, Optical coherence tomography, Spectroscopy, Imaging systems

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Proceedings Article | 27 October 2006 Paper

Shape from shading-based 3D face shape recovery from single 2D image

Fenlan Li, Kexin Xu

Proceedings Volume 6047, 60473S (2006) https://doi.org/10.1117/12.710741

KEYWORDS: 3D modeling, 3D image processing, Image restoration, Reflectivity, Eye models, Iris recognition, Facial recognition systems, Detection and tracking algorithms, Eye, Convolution

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Proceedings Article | 27 October 2006 Paper

Fast discrimination of danshen from different geographical areas by NIR spectroscopy and advanced cluster analysis method

Ning Li, Yan Wang, Kexin Xu

Proceedings Volume 6047, 604725 (2006) https://doi.org/10.1117/12.710981

KEYWORDS: Principal component analysis, Near infrared, Medicine, Near infrared spectroscopy, Spectroscopy, Data modeling, FT-IR spectroscopy, Statistical modeling, Artificial neural networks, Particles

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Proceedings Article | 27 October 2006 Paper

Quantitative effect of temperature to the absorbance of aqueous glucose in wavelength range from 1200 nm to 1700 nm

Houxin Cui, Lin An, Wenliang Chen, Kexin Xu

Proceedings Volume 6047, 604726 (2006) https://doi.org/10.1117/12.710929

KEYWORDS: Glucose, Temperature metrology, Absorbance, Absorption, Blood, Calibration, Sensors, Spectroscopy, Scattering, Monte Carlo methods

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Proceedings Article | 24 October 2006 Paper

Wavelength selection to increase robustness of the multivariate calibration model in near infrared spectroscopy

Qingbo Li, Xiang Li, Guangjun Zhang, Kexin Xu, Yan Wang

Proceedings Volume 6357, 63570T (2006) https://doi.org/10.1117/12.716898

KEYWORDS: Calibration, Genetic algorithms, Statistical modeling, Glucose, Instrument modeling, Thermal modeling, Near infrared spectroscopy, Optimization (mathematics), Error analysis, Spectroscopy

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Genetic algorithm is a non-derived random optimization method based on the regulations of nature selection and evolution. Generally, when genetic algorithm is applied to wavelength selection, only how to improve the prediction accuracy of a regression model is concerned. But the robustness of a regression model, that is, the anti-interference ability towards external measuring conditions variance (such as the ambient temperature, place and so on), is usually ignored. Therefore, when the measuring conditions of the predicted samples change, the regression model would predict the measured samples with high prediction errors. In this paper, genetic algorithm combined with experimental design method was studied to increase the robustness of the multivariate calibration model. In our experiments, the training set was divided into the calibration set and the monitor set to establish the regression model. The spectra of the calibration set samples were measured under the ordinary measuring conditions. The measuring conditions when obtaining the monitor set sample spectra could be arranged according to experimental design method. Kennard/Stone algorithm was used to select monitor set samples from training set. The calibration model could be built with the calibration set samples and optimized with the monitor set samples measured under the designed measuring conditions. And then the validation set samples, which were independent of the training set ones, were employed to evaluate the prediction ability of the regression model. In order to obtain a regression model with high prediction accuracy and robustness, the spectral information caused by the changes of measuring conditions need to be considered and those wavelengths which were easily interfered by external measuring factors need to be rejected when the calibration model was trained. In this paper, the modified wavelength selection method of genetic algorithm was applied to the temperature experiments of the glucose aqueous solution samples. Results revealed that not only fewer wavelengths or principal components were needed to build the calibration model but also the robustness and prediction accuracy of the calibration model were greatly improved. This modified method not only makes the regression model insensitive to external measuring conditions, but also could be applied to the calibration transfer between different instruments of the same type.

Proceedings Article | 27 February 2006 Paper

Discussion on floating-reference method for noninvasive measurement of blood glucose with near-infrared spectroscopy

Yunhan Luo, Lin An, Zhen Ma, Rong Liu, Kexin Xu

Proceedings Volume 6094, 60940K (2006) https://doi.org/10.1117/12.645684

KEYWORDS: Glucose, Signal to noise ratio, Blood, Absorption, Scattering, Near infrared spectroscopy, Monte Carlo methods, Diffuse reflectance spectroscopy, Interference (communication), Tissue optics

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Proceedings Article | 27 February 2006 Paper

The feasibility investigation of non-invasive blood glucose sensing based on near-infrared spectroscopy

Xiaoyu Gu, Bin Deng, Lin An, Wenliang Chen, Kexin Xu

Proceedings Volume 6094, 60940J (2006) https://doi.org/10.1117/12.645386

KEYWORDS: Glucose, Blood, Skin, Near infrared spectroscopy, Calibration, Veins, Spectroscopy, Arteries, Blood vessels, Near infrared

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Proceedings Article | 22 June 2005 Paper

Study on measurement of milk constituents by NIR analysis

Zhonghai He, Kexin Xu, Yonghui Han

Proceedings Volume 5771, (2005) https://doi.org/10.1117/12.634778

KEYWORDS: Calibration, Absorption, Scattering, Proteins, Near infrared, Light scattering, Integrating spheres, Diffuse reflectance spectroscopy, Optical testing, Statistical analysis

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Proceedings Article | 29 March 2005 Paper

The discussion about the complexity of samples and the prediction accuracy of glucose concentration in non-invasive blood glucose sensing

Xiaoyu Gu, Rong Liu, Wenliang Chen, Kexin Xu

Proceedings Volume 5696, (2005) https://doi.org/10.1117/12.596978

KEYWORDS: Glucose, Calibration, Blood, Plasma, Error analysis, Absorption, Near infrared, Statistical analysis, Near infrared spectroscopy, Statistical modeling

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Proceedings Article | 29 March 2005 Paper

Preliminary study of mechanism of non-invasive blood glucose measurement based on near-infrared diffuse reflectance spectroscopy

Wenliang Chen, Rong Liu, Yunhan Luo, Yonghui Han, Kexin Xu

Proceedings Volume 5696, (2005) https://doi.org/10.1117/12.589597

KEYWORDS: Glucose, Absorption, Scattering, Diffuse reflectance spectroscopy, Transmittance, Blood, Integrating spheres, Collimation, Water, Near infrared spectroscopy

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Proceedings Article | 29 March 2005 Paper

Analysis of sensitivity and optical path-length in non-invasive measurement of glucose with near infrared spectroscopy

Yunhan Luo, Rong Liu, Wenliang Chen, Houxin Cui, Kexin Xu

Proceedings Volume 5696, (2005) https://doi.org/10.1117/12.596172

KEYWORDS: Glucose, Photons, Absorption, Scattering, Diffuse reflectance spectroscopy, Blood, Monte Carlo methods, Tissue optics, Near infrared spectroscopy, Near infrared

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Proceedings Article | 7 March 2005 Paper

Extraction of glucose information in blood glucose measurement by noninvasive near-infrared spectra

Rong Liu, Wenliang Chen, Xiaoyu Gu, Yunhan Luo, Kexin Xu

Proceedings Volume 5702, (2005) https://doi.org/10.1117/12.587319

KEYWORDS: Glucose, Signal analyzers, Blood, Absorption, In vivo imaging, Absorbance, Diffuse reflectance spectroscopy, Calibration, In vitro testing, Near infrared

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Proceedings Article | 20 January 2005 Paper

New study on self-mixing interference effects in LD-pumped laser

Yong Zhang, Jian-quan Yao, Kexin Xu, Peng Wang

Proceedings Volume 5628, (2005) https://doi.org/10.1117/12.574126

KEYWORDS: Laser damage threshold, Laser applications, Interferometers, Defense technologies, Light emitting diodes, Tunable lasers, Light sources, Semiconductor lasers, Feedback signals, Optoelectronics

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Proceedings Article | 20 January 2005 Paper

Study on self-mixing interference effects in LD-pumped laser with compensatory cavity

Yong Zhang, Jian-quan Yao, Kexin Xu, Peng Wang

Proceedings Volume 5628, (2005) https://doi.org/10.1117/12.574134

KEYWORDS: Mirrors, Reflectivity, Defense technologies, Laser applications, Tunable lasers, Distance measurement, Refractive index, Optoelectronics, Information science, Information technology

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Proceedings Article | 20 January 2005 Paper

Quantum mechanism method for self-mixing interference effects in LD-pumped laser

Yong Zhang, Jian-quan Yao, Kexin Xu, Peng Wang

Proceedings Volume 5628, (2005) https://doi.org/10.1117/12.574136

KEYWORDS: Laser applications, Defense technologies, Tunable lasers, Quantum physics, Laser systems engineering, Optoelectronics, Information science, Information technology, Defense and security, Reflectivity

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Proceedings Article | 18 January 2005 Paper

Photoacoustic tomography imaging of biological tissues

Yixiong Su, Ruikang Wang, Kexin Xu, Fan Zhang, Jianquan Yao

Proceedings Volume 5630, (2005) https://doi.org/10.1117/12.571936

KEYWORDS: Photoacoustic tomography, Tissues, Photoacoustic spectroscopy, Signal detection, Biomedical optics, Absorption, Tomography, Sensors, Acoustics, Photoacoustic imaging

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Proceedings Article | 18 January 2005 Paper

Improved performance in diffuse reflectance measurement by polarization discrimination

Yixiong Su, Kexin Xu, Ruikang Wang

Proceedings Volume 5630, (2005) https://doi.org/10.1117/12.571914

KEYWORDS: Tissue optics, Reflectivity, Polarization, Natural surfaces, Diffuse reflectance spectroscopy, Tissues, Absorption, Signal detection, Specular reflections, Signal to noise ratio

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Proceedings Article | 18 January 2005 Paper

Penetration depth of diffused photons re-emitted from layered tissue and its application to near-infrared spectroscopy

Yunhan Luo, Houxin Cui, Yonghui Han, Wenliang Chen, Kexin Xu

Proceedings Volume 5630, (2005) https://doi.org/10.1117/12.576250

KEYWORDS: Photons, Monte Carlo methods, Tissue optics, Near infrared spectroscopy, Absorption, Diffuse reflectance spectroscopy, Chromophores, Calibration, Glucose, Blood

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Proceedings Article | 10 January 2005 Paper

Development of direct orthogonalization method in NIR spectral analysis

LiJie Wang, Jianying Guo, KeXin Xu

Proceedings Volume 5640, (2005) https://doi.org/10.1117/12.575323

KEYWORDS: Data modeling, Glucose, Near infrared, Absorption, Statistical analysis, Statistical modeling, Calibration, Optical filters, Molecules, Electronic filtering

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Proceedings Article | 10 January 2005 Paper

Determination of multiple components in urine using FT-MIR, NIR, and FT-Raman spectroscopic technique

Weiling Liu, Kexin Xu, Qilian Yu, Sixiang Zhang, Duogang Ran

Proceedings Volume 5640, (2005) https://doi.org/10.1117/12.571816

KEYWORDS: Spectroscopy, Near infrared, Raman spectroscopy, Glucose, Near infrared spectroscopy, Absorption, Fourier transforms, Calibration, Mid-IR, FT-IR spectroscopy

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Proceedings Article | 10 January 2005 Paper

Factors affecting the accuracy of a NIR spectral system for measuring milk constituents

LiJie Wang, Jianying Guo, KeXin Xu

Proceedings Volume 5640, (2005) https://doi.org/10.1117/12.572510

KEYWORDS: Crystals, Near infrared, Data modeling, Mathematical modeling, Computing systems, Temperature metrology, Calibration, Infrared radiation, Time metrology, Acoustics

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Proceedings Article | 15 October 2004 Paper

Method of multirange models by near-infrared spectral analysis for nonlinear optics of organic materials

Xuedian Zhang, Min Chang, Kexin Xu

Proceedings Volume 5517, (2004) https://doi.org/10.1117/12.559078

KEYWORDS: Calibration, Statistical modeling, Data modeling, Near infrared, Systems modeling, Organic materials, Near infrared spectroscopy, Proteins, Nonlinear optics, Spectroscopy

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Proceedings Article | 29 July 2004 Paper

Path length selection method for quantitative analysis with near-infrared spectroscopy

Kexin Xu, Yanhui Lu, Qingbo Li, Yan Wang

Proceedings Volume 5486, (2004) https://doi.org/10.1117/12.571462

KEYWORDS: Near infrared, Quantitative analysis, Glucose, Absorption, Calibration, Absorbance, Near infrared spectroscopy, Biomedical optics, Sensors, Spectroscopy

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Proceedings Article | 29 July 2004 Paper

Evaluation of contact status between probe and skin for noninvasive blood sensing with NIR reflectance spectroscopy

Qingjun Qiu, Kexin Xu, Jingying Jiang, Wen Liang Chen

Proceedings Volume 5486, (2004) https://doi.org/10.1117/12.571362

KEYWORDS: Skin, Reflectivity, Tissues, In vivo imaging, In vitro testing, Near infrared, Blood, Glucose, Reflectance spectroscopy, Near infrared spectroscopy

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Proceedings Article | 28 May 2004 Paper

Study on optical measurement conditions for noninvasive blood glucose sensing

Kexin Xu, Wenliang Chen, Jingying Jiang, Qingjun Qiu

Proceedings Volume 5330, (2004) https://doi.org/10.1117/12.535362

KEYWORDS: Glucose, Absorption, Near infrared, Near infrared spectroscopy, Photons, Spectroscopy, Monte Carlo methods, Blood, Tissues, Mathematical modeling

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Proceedings Article | 8 December 2003 Paper

A simple method for determination of optical properties of turbid media

Kexin Xu, Yonghui Han, Yong Ni, Youzhou Hu

Proceedings Volume 5254, (2003) https://doi.org/10.1117/12.546144

KEYWORDS: Near infrared, Tissue optics, Absorption, Optical properties, Diffuse reflectance spectroscopy, Monte Carlo methods, Geometrical optics, Absorbance, Optical testing, Tissues

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Proceedings Article | 13 October 2003 Paper

The interface between probe and skin in noninvasive glucose sensing

Kexin Xu, Qingjun Qiu, Wenbo Wang, Jingying Jiang

Proceedings Volume 5068, (2003) https://doi.org/10.1117/12.518749

KEYWORDS: Skin, Temperature metrology, Tissues, Tissue optics, Reflectivity, Glucose, Fiber optics, Blood, Light scattering, Natural surfaces

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Proceedings Article | 20 September 2002 Paper

Standardization of acousto-optic tunable filter NIR spectrometric instrument

Wenbo Wang, Yixiong Su, Chengzhi Jiang, Kexin Xu

Proceedings Volume 4927, (2002) https://doi.org/10.1117/12.471413

KEYWORDS: Calibration, Spectroscopy, Acousto-optics, Tunable filters, Near infrared, Near infrared spectroscopy, Spectroscopes, Glucose, Crystals, Modulation

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Proceedings Article | 20 September 2002 Paper

Methods for enhancing the resolution of AOTF as a NIR spectrometer

Yong Ni, Kexin Xu, Chengzhi Jiang, Dingwen Zhou

Proceedings Volume 4927, (2002) https://doi.org/10.1117/12.471712

KEYWORDS: Acoustics, Near infrared, Modulation, Transducers, Resolution enhancement technologies, Spectroscopy, Signal to noise ratio, Spectroscopes, Near infrared spectroscopy, Crystals

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Proceedings Article | 20 September 2002 Paper

Artificial neural network and application in calibration transfer of AOTF-based NIR spectrometer

Wenbo Wang, Chengzhi Jiang, Kexin Xu, Bin Wang

Proceedings Volume 4927, (2002) https://doi.org/10.1117/12.471415

KEYWORDS: Calibration, Spectroscopy, Data modeling, Artificial neural networks, Statistical modeling, Near infrared, Instrument modeling, Absorption, Neurons, Acousto-optics

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Proceedings Article | 20 September 2002 Paper

Near-infrared spectroscopic measurement system of the constituent concentration based on acousto-optic tunable filter

Qingbo Li, Chengzhi Jiang, Kexin Xu

Proceedings Volume 4927, (2002) https://doi.org/10.1117/12.471697

KEYWORDS: Modulation, Signal to noise ratio, Near infrared spectroscopy, Acousto-optics, Tunable filters, Spectral resolution, Near infrared, Spectroscopy, Spectroscopes, Absorption

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