| 基于数字锁相解复用的多通道近红外光并行检测技术 |
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| 引用本文： | 赵会娟,王志朝,王婷婷,侯少华,高峰.基于数字锁相解复用的多通道近红外光并行检测技术[J].纳米技术与精密工程,2011,9(3):228-233. |
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| 作者姓名： | 赵会娟 王志朝 王婷婷 侯少华 高峰 |
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| 作者单位： | 天津大学精密仪器与光电子工程学院,天津,300072 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目，国家自然科学基金资助项目，天津市重点基金资助项目 |
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| 摘 要： | 多波长光源照射下微弱光的准确检测是利用近红外漫射光进行人体疾病诊断时所面临的基本问题,而多光源并行检测是实现快速测量所要解决的关键问题之一.基于数字锁相的基本原理,提出了结合单光子计数技术和现场可编程门阵列(FPGA)平台的多通道数字锁相方案,不但可实现微弱光的准确检测,而且可实现多通道实时并行检测.基于此方案,搭建了多通道近红外光检测系统.实验结果表明,所搭建的检测系统对由仿体出射光的检测信噪比为24dB,同时对不同频率编码的光源具有很好的识别度,对不同调制幅度的测量误差小于9.13%.
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| 关 键 词： | 数字锁相检测 单光子计数 频分复用技术 近红外光检测 |
Parallel Detection of Multichannel Near Infrared Light Based on Digital Lock-In Detection |
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| ZHAO Hui-juan,WANG Zhi-chao,WANG Ting-ting,HOU Shao-hua,GAO Feng.Parallel Detection of Multichannel Near Infrared Light Based on Digital Lock-In Detection[J].Nanotechnology and Precision Engineering,2011,9(3):228-233. |
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| Authors: | ZHAO Hui-juan WANG Zhi-chao WANG Ting-ting HOU Shao-hua GAO Feng |
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| Affiliation: | ZHAO Hui-juan,WANG Zhi-chao,WANG Ting-ting,HOU Shao-hua,GAO Feng(School of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China) |
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| Abstract: | The accurate detection of weak light caused by multiple light sources is a fundamental problem in the domain of human disease diagnosis using near infrared(NIR) light.In addition,parallel detection under multiple sources serves as an effective way for real-time fast measurement.Based on the principle of digital lock-in detection,a multichannel digital lock-in scheme on an FPGA platform using single photon counting technique was proposed in this paper,which could achieve not only accurate detection of weak l... |
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| Keywords: | digital lock-in detection single photon counting frequency division multiplexing near infrared light detection |
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