强激光近场分布测量中科学级CCD的非均匀性校正  

Correct non-uniformity of scientific grade CCD in measuring laser near field distributing

作　　者：蔺辉[1] 刘立力[1] 田新锋[1] 郝芸 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119 [2]陕西凌云科技有限公司,陕西西安710119

出　　处：《红外与激光工程》2014年第7期2108-2111,共4页Infrared and Laser Engineering

基　　金：国家高技术惯性约束领域项目(YO1Z531BOA)

摘　　要：首先分析了引起CCD非均匀性的原因,将其归纳为两个方面,一为因制作工艺、材料、偏置等因素引起的空间噪声,二为CCD响应特性随时间的漂移而引起的时间噪声,两者的共同作用将严重影响CCD的测量性能。为了能够定量描述空间噪声和时间噪声对CCD产生非均匀性的影响,文中基于CCD光电响应曲线呈线性状态这一假设建立了CCD光电响应的数学模型,然后在该模型的基础上提出了利用最小二乘法来估计校正系数,从而消除CCD的非均匀性,实验证明该算法是有效的。The reason of photo response non-uniformity （PRNU） of image sensor′s photo response was analyzed in this paper at first. It was concluded in two faces, one caused by spatial noise which based on materials, manufacture crafts and offset and another caused by temporal noise which based on its response with time drift, theses two factors influence the PRNU of image sensor′s photo response gravely. To describe the affection of spatial noise and temporal noise, the model of sensor based on the hypothesis that linear of image sensor′s photo response was made, and the erase non-uniformity of CCD by Least Square Methods based on this model was proposed. Experiment results show that the proposed algorithm is effective to the correction of image sensor′s PRNU.

关 键 词：非均匀性校正 最小二乘法 CCD 

分 类 号：TN386.5[电子电信—物理电子学]