实时数字微镜哈达玛变换光谱仪的电学结构设计  

The electrical structure design of instantaneous Hadamard transform spectrometer with digital micro-mirror device

作　　者：全向前[1,2] 刘华[1] 卢振武[1] 王晓朵[1,2] 全永前 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京130039 [3]中国南车集团株洲时代新材料科技股份有限公司,湖南株洲412007

出　　处：《光学仪器》2016年第1期85-90,共6页Optical Instruments

基　　金：国家自然科学基金重点项目(No.61137001);国家重大科学仪器设备开发专项(2013YQ140517)

摘　　要：为了提高数字微镜(digital micro-mirror device,DMD)哈达玛变换光谱仪的编码效率,满足光谱仪大量、实时采集的要求,设计了一种新的DMD哈达玛变换光谱仪的电学结构。将哈达玛编码数据预存到DMD驱动板板载FLASH芯片上,编码时将编码数据读取到DDR2板载内存上,连续播放DMD编码条纹,通过DMD的内同步信号触发光谱采集系统采集光谱数据。实验表明,对511阶哈达玛变换来说,光谱仪的采集时间小于1s,可以满足哈达玛变换光谱仪实时的光谱检测要求,并且其结构还降低了对上位机的依赖,为光谱仪脱离上位机操作奠定了基础。In order to improve the efficiency of traditional Hadamard transform(HT)spectrometer with digital micro-mirror device(DMD),a new electrical structure design of DMD-HT spectrometer is designed.The HT encoding data is saved to FLASH chip on board so that encoding data can be read to on-board memory during operation.Then encoding stripe runs in the cycling mode,and the detection system is triggered to collect data according to the sync signal.The experiments show that the acquisition time is less than 1second for 511-order HT spectrometer.The structure can meet the requirements of mass and real-time acquisition.In addition,the structure reduces the dependence on PC,which laid a foundation for HT spectrometer with DMD independence of PC.

关 键 词：光谱仪 编码效率 哈达玛变换 数字微镜 

分 类 号：O43[机械工程—光学工程]