| 弱光条件下的高分辨光谱测量 |
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| 引用本文： | 蓝若明,刘雪峰,姚旭日,俞文凯,翟光杰.弱光条件下的高分辨光谱测量[J].光电子．激光,2015(11):2175-2179. |
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| 作者姓名： | 蓝若明 刘雪峰 姚旭日 俞文凯 翟光杰 |
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| 作者单位： | 中国科学院 国家空间科学中心,复杂航天系统电子信息技术重点实验室,北京 100190 ;中国科学院 大学,北京100190 ;山东师范大学 物理与电子科学学院,山东 济南 250014;中国科学院 国家空间科学中心,复杂航天系统电子信息技术重点实验室,北京 100190;中国科学院 国家空间科学中心,复杂航天系统电子信息技术重点实验室,北京 100190;北京理工大学 物理学院,北京 100081;中国科学院 国家空间科学中心,复杂航天系统电子信息技术重点实验室,北京 100190 |
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| 基金项目： | 国家重大科学仪器设备开发专项(2013YQ030595)、国家高技术研究发展计划(2013AA122902)和山东省高等学校科技计划(J14LN07)资助项目 (1．中国科学院国家空间科学中心,复杂航天系统电子信息技术重点实验室,北京 100190； 2．中国科学院大学,北京100190； 3．山东师范大学 物理与电子科学学院,山东 济南 250014； 4.北京理工大学 物理学院,北京 100081) |
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| 摘 要： | 提出了一种基于数字微镜器件(DMD)和光电倍 增管(PMT)的弱光高分辨光谱测量 的新方法。 首先,利用基于小尺寸狭缝的分光光路将被测光光谱成像到DMD上,然后DMD微镜阵列按列依 次翻转 将光谱分波段投射到PMT点探测器上,最终实现对光谱的分时扫描测量。进行了与CCD光 谱仪的对 比实验以及不同弱光条件下的测试实验,并对系统的信噪比(SNR)特性进行了实验测试。实验结果表明,光谱测 量系统的谱分辨率高达0.23nm,灵敏度可达4.6pW以下,系统的信噪比(SNR)特性比较理想。相对于传 统的光谱 测量方法,本文方法具有成本低、易于实现且性能稳定等优点,在弱光高分辨光谱测量领域 具有较大的潜在应用价值。
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| 关 键 词： | 光谱测量 弱光 高分辨 扫描方式 |
| 收稿时间： | 2015/7/13 0:00:00 |
High-resolution spectral measurement of low light based on DMD and PMT |
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| LAN Ruo-ming,LIU Xue-feng,YAO Xu-Ri,YU Wen-kai and ZHAI Guang-jie.High-resolution spectral measurement of low light based on DMD and PMT[J].Journal of Optoelectronics·laser,2015(11):2175-2179. |
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| Authors: | LAN Ruo-ming LIU Xue-feng YAO Xu-Ri YU Wen-kai and ZHAI Guang-jie |
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| Affiliation: | Key Laboratory of Electronics and Information Technology for Space Systems, National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China ;University of Chinese Academy of Sciences,Beijing 100190,China ;School of Physics and Electronics,Shandong Normal University,Jinan 250014, China;Key Laboratory of Electronics and Information Technology for Space Systems, National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Electronics and Information Technology for Space Systems, National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China ;University of Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Electronics and Information Technology for Space Systems, National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China ;University of Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Electronics and Information Technology for Space Systems, National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China |
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| Abstract: | In this paper,in order to realize the high-resolution spectral measu rement of low light,we propose a new spectral measurement method which is based on a digital micro-mirror device (DMD) and a photoelectric multiplier tube (PMT).Firstly,the spectrum of the measured light is imaged on a DMD by the dispersive optics system based on a small-size slit.Secondly,by the rotation of the micro-mirr ors of the DMD per column,the spectrum is reflected to a PMT according to the different wavelengths.Lastly,t he measurement of the spectrum is achieved through the scanning mode.The contrast experiments of our method and a charge-coupled device (CCD) spectrometer are performed,and the experiments for different low light con ditions are also performed.At last,the signal-to-noise ratio (SNR) experiment of the system is conducted.The results show that the spectral resolution is 0.23nm,the sensitivity of the spectral system is less than 4.6pW,and the SNR performance is also perfect.Co mpared with the conventional spectroscopy technique,t his spectral measurement method has the merits of low price,easy implementation and stable performance. |
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| Keywords: | spectral measurement low light high resolution scanning mode |
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