科学级ccd-科学级CCD三维噪声模型及其评估

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  科学级CCD三维噪声模型及其评估_电子/电路_工程科技_专业资料。为了评估科学CCD噪声带给激光近场分布测量的影响,采用三维噪声模型,分析了科学级CCD的噪声,并将CCD的噪声分解为空间噪声和时间噪声.空间噪声用来评估CCD像元之间响应不一致性对测量的影响,时间噪声用来评估多次测量不一致性对测量的影响.通过设计测量系统对CCD三维噪声进行测量,并分析时空噪声的

  第4l卷第4期 V0141 NO.4 红外与激光工程 Infrared and Laser Engineering 2012年4月 Apr.2012 科学级CCD三维噪声模型及其评估 刘立力,达争尚,田新锋,李坤,陈永权 (中国科学院西安光学精密机械研究所,科学级ccd陕西西安710119) 摘 要:为了评估科学CCD噪声带给激光近场分布测量的影响,采用三维噪声模型,分析了科学级 CCD的噪声,并将CCD的噪声分解为空间噪声和时间噪声。空间噪声用来评估CCD像元之间响应 不一致性对测量的影响,科学级ccd时间噪声用来评估多次测量不一致性对测量的影响。通过设计测量系统对 CCD三维噪声进行测量,并分析时空噪声的统计分布规律,发现两者均是依赖于信号、近似服从正态 分布,科学级ccd建立了依赖于信号的时空噪声的数学模型,并实验验证了该模型是有效的。 关键词:科学CCD; 中图分类号:TN386.5 三维噪声模型; 时间噪声; 空间噪声 文献标志码:A 文章编号:1007—2276(2012)04—1089—05 3-D noise model and evaluation of scientific grade CCD Liu Lili,Da Zhengshang,Tian Xinfeng,Li Kun,Chen Yongquan (xi’all Institute of Optics and Precision Mechanics,Chinese Academy of Sciences.Xi’all 710119,China) field distribution measurement, spatial noise between Abstract:To evaluate the influences resulted by CCD noise in laser near 3一D noise model was used to analyze the characters of CCD noise and temporal noise.Spatial noise was was which was classified into by used used noise to to evaluate influences resulted no-uniformity different pixels,and temporal noise To measure system noise,CCD evaluate influences resulted by system was multiple was measurements. composed of 3-D measurement designed,it semiconductor laser,integrating sphere,attenuating plate,scientific grade CCD,optical power meter and computer.Integrating sphere was used to unify to the input laser and CCD was connected accepted by CCD to one of its be output ports.Optical power meter was changed by By testing were used record optical power Milch could adjusting for one attenuating plate.CCD output data to export PC were was used to anMyze CCD noise. and temporal noise standard was type of scientific and grade CCD,it concluded that spatial noise signal—dependent terms of noise and followed normal distribution.The relationship one model between deviation signal was studied,and way of identifying effective. the parameters of model proposed.The experiments verified that this model was Key words:scientific grade CCD;3-D noise model;temporal noise;spatial noise 收稿Et期:2011-08—22; 修订日期:2011一09—19 基金项目:国家高技术惯性约束领域项目(Y012531BOA) 作者简介:刘立力(1983-),男,工程师,硕土.主要从事强激光参数诊断方面的研究工作。Email:lililiu一2002@153.tom 导师简介:达争尚(1973一),男,研究员,博士,主要从事强激光参数诊断方面的研究工作。Emml:dazhengshang@opt.ac.Crl 万方数据

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