180152-1
DOI: 10.12086/oee.2018.180152 基于面阵CCD 的高灵敏度微型
光谱仪的设计与实现
徐丹阳*，杜春年
浙江工业大学理学院，浙江 杭州 310023 摘要：面阵CCD 具有灵敏度高、动态范围大的优点，适用于荧光测量、DNA 测序、拉曼光谱分析和低光度检测，因此，研制基于面阵CCD 的高灵敏度微型光纤光谱仪具有重要的实际价值。光学系统采用了优化后的交叉非对称型Czerny-Turner 结构，并获得了1 nm 的光学分辨率。结合DC-DC 和LDO 的设计方法，通过USB 供电实现了6路电压输出的复杂电源系统设计；通过Verilog HDL 完成了CCD 驱动时序设计；采用Altera 公司的EPM7064芯片实现了驱动信号输出。CCD 输出的视频信号经双相关采样的高速16位AD 芯片AD9826转换后存储在独立的静态RAM 中，使得数据的采集和读取分离。所设计与实现的微型高灵敏度光纤光谱仪的灵敏度是通常基于线阵CCD 的微型光谱仪的11倍左右，动态范围20000:1，信噪比达到500:1，很大程度地提高了微型光纤光谱仪的性能。
关键词：光谱仪；面阵CCD ；高灵敏度；CPLD ；双相关采样
中图分类号：TH741 文献标志码：A
引用格式：徐丹阳，杜春年. 基于面阵CCD 的高灵敏度微型光谱仪的设计与实现[J]. 光电工程，2018，45(11): 180152
Design and implementation of high sensitivity
micro spectrometer based on area array CCD
Xu Danyang *, Du Chunnian
College of Science, Zhejiang University of Technology, Hangzhou, Zhejiang 310023, China
Abstract: The area array CCD has the advantages of high sensitivity and wide dynamic range, which is suitable for fluorescence measurement, DNA sequencing, Raman spectroscopy and low photometric detection. Therefore, it is of great practical value to develop high sensitivity micro fiber spectrometer based on area array CCD. The optical resolution of 1 nm is obtained by using an optimized cross-asymmetric Czerny-Turner optical system structure. By combining the design methods of DC-DC and LDO, the complex power system with 6 voltage outputs is realized through USB power supply. The CCD drive timing design is achieved by Verilog HDL language and the signals are output through Altera's EPM7064 chip. After the CCD output video signal is converted by high-speed 16 bit AD chip AD9826, digital signals are stored in a separate static RAM, allowing dacquisition and reading of data to be sepa-rated. The sensitivity of designed micro-high sensitivity spectrometer is 11 times of that of spectrometer based on linear array CCD. Furthermore, it has a dynamic range of 20000: 1 and a signal-to-noise ratio of 500: 1. This work greatly improves the microfiber spectrometer performance.
Keywords: spectrometer; area array CCD; high sensitivity; complex programmable logic device(CPLD); correlated double sample
Citation:
Xu D Y , Du C N . Design and implementation of high sensitivity micro spectrometer based on area array CCD[J]. Opto-Electronic Engineering , 2018, 45(11): 180152
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收稿日期：2018-03-27； 收到修改稿日期：2018-05-21
基金项目：国家自然科学基金资助项目(11604295)；浙江省自然科学基金资助项目(LQ17C100002)
作者简介：徐丹阳(1983-)，男，硕士，实验师，主要从事光电探测技术方面的研究。E-mail ：xudanyang@https://www.doczj.com/doc/631232375.html,
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