基于FPGA的面阵CCD光谱采集系统设计  

Design of Area Array CCD Spectrum Acquisition System Based on FPGA

作　　者：陈瀚 黄斐[1] 薛萌 朱亮庆 郭汉明[1] CHEN Han;HUANG Fei;XUE Meng;ZHU Liang-qing;GUO Han-ming(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《软件导刊》2022年第3期138-144,共7页Software Guide

基　　金：国家自然科学基金项目(61178079)。

摘　　要：微型化是拉曼光谱仪的发展趋势,面阵CCD具有灵敏度高、动态范围大、量子效率高、体积小等优点,非常适合用来对拉曼光谱进行探测。设计一种基于现场可编程逻辑器件的面阵CCD光谱采集系统,系统以Hamamatsu公司的S11510-1106型面阵CCD作为光电传感器,通过FPGA芯片及Verilog语言实现对整个系统的控制,使用CCD专用信号处理芯片AD9823与模数转换芯片ADS8381,基于相关双采样原理对CCD信号去噪并实现高速A/D转换,同时用串口完成CCD数据传输,最后在上位机软件上显示采集的光谱数据。测试结果表明,该系统能够正确地采集与显示光谱信息,且电路体积小、控制时序精确、采集效果良好,非常适合作为微型拉曼光谱仪的光谱采集系统。Miniaturization is the development trend of Raman spectrometer.Area array CCD,which has the advantages of high sensitivity,large dynamic range,high quantum efficiency and small volume,has become a research hotspot in the field of Raman spectrometer.In this paper,an area array CCD spectrum acquisition system based on field programmable logic device is designed.The system uses S11510-1106 area array CCD of Hamamatsu company as photoelectric sensor,controls the whole system with Verilog language through FPGA chip,and uses CCD special signal processing chip AD9823 and analog-to-digital converter ADS8381,the CCD signal is denoised and the high-speed A/D conversion is realized based on the principle of correlation double sampling.At the same time,the CCD data is transmitted through the serial port.Finally,the collected spectral data is displayed on the host computer software.The test results showed that the design can correctly collect and display spectral information,and has the advantages of small circuit volume,accurate control timing and good acquisition effect,which can be used as the spectral acquisition system of micro Raman spectrometer.

关 键 词：拉曼光谱仪 光谱采集 面阵CCD FPGA 相关双采样 VERILOG 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]