| 凝视成像三维激光雷达噪声分析 |
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| 引用本文： | 周琴,张秀达,胡剑,严惠民.凝视成像三维激光雷达噪声分析[J].中国激光,2011(9). |
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| 作者姓名： | 周琴 张秀达 胡剑 严惠民 |
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| 作者单位： | 浙江大学现代光学仪器国家重点实验室国家光学仪器工程技术研究中心; |
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| 基金项目： | 国家863计划(2009AA12Z142); 国家973计划(2009CB724004)资助课题 |
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| 摘 要： | 增强型电荷耦合器件(ICCD)是凝视成像三维激光雷达的关键器件之一。测量了在不同输入光强和不同像增强器增益电压条件下的光强以及噪声。根据光电探测过程,用泊松随机过程理论和最小二乘拟合法对测得的光强噪声数据进行了分析,发现噪声主要由来自于像增强器的等效光电子散粒噪声和电荷耦合器件(CCD)的光电子散粒噪声组成。尽管像增强器对光信号进行了放大,在大部分情况下,CCD的光电子散粒噪声也不可忽略。建立了双随机变量泊松过程的三维成像噪声模型,利用该模型给出了测距误差最小意义下的最优增益距离调制函数。
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| 关 键 词： | 成像系统 增益调制 双随机变量泊松过程 像增强器 散粒噪声 |
Noise Analysis of Staring Three-Dimensinal Active Imaging Laser Radar |
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| Zhou Qin Zhang Xiuda Hu Jian Yan Huimin.Noise Analysis of Staring Three-Dimensinal Active Imaging Laser Radar[J].Chinese Journal of Lasers,2011(9). |
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| Authors: | Zhou Qin Zhang Xiuda Hu Jian Yan Huimin |
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| Affiliation: | Zhou Qin Zhang Xiuda Hu Jian Yan Huimin(National Engineering and Technology Research Center for Optical Instrument,State Key Laboratory ofModern Optical Instrument,Zhejiang University,Hangzhou,Zhejiang 310027,China) |
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| Abstract: | Intensified change coupled device(ICCD) is one of the key devices in the staring three-dimensinal(3D) active imaging laser radar.The intensity and noises were measured with different input light intensities and different intensified gain voltages.According to the photoelectric detection process,the measured intensity and noises are analyzed with Poisson random process theory and the least square fitting method.It is found out that the noises consist of the equivalent photoelectron shot noise from the image ... |
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| Keywords: | imaging systems modulated gain doubly stochastic Poisson process image intensifier shot noise |
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