科学级光学CCD信噪比特性分析

核聚变与等离子体物理 ›› 2014, Vol. 34 ›› Issue (4): 361-366.

科学级光学CCD信噪比特性分析

王伶俐，李守贝，张惠鸽，王哲斌，刘浩，张琛，张文海，易有根

(1. 中南大学物理与电子学院，长沙410083； 2. 中国工程物理研究院激光聚变研究中心，绵阳621900； 3. 南昌航空大学信息工程学院；南昌330063)

收稿日期:2013-03-13 修回日期:2014-08-14 出版日期:2014-12-15 发布日期:2014-12-15
作者简介:王伶俐(1989-)，女，河南信阳人，硕士，主要从事光学精密仪器研究。
基金资助:
国家自然科学基金资助项目(10804101，60908023)

Performance analysis on SNR of scientific grade optical CCD

WANG Ling-li, LI Shou-bei,ZHANG Hui-ge,WANG Zhe-bin,LIU Hao,ZHANG Chen,ZHANG Wen-hai,YI You-gen

(1. School of Physics and Electron, Central South University, Changsha 410083; 2. Research Center of Laser Fusion, CAEP, Mianyang 621900; 3. School of Information Engineering, Nanchang Hangkong University, Nanchang 330063)

Received:2013-03-13 Revised:2014-08-14 Online:2014-12-15 Published:2014-12-15
Supported by:
国家自然科学基金资助项目(10804101，60908023)

摘要/Abstract

摘要：

从噪声来源出发，基于入射光子、暗电流、偏置信号的涨落均近似满足泊松分布的条件，得到了更为精准的信噪比表达式。实验设置CCD增益、读出速率、冷却温度分别为3、100kHz、−25°C，得出光子转移曲线。通过设置不同实验条件，分别探讨了暗电流、读出速率和系统增益对该科学级光学CCD信噪比的影响。实验结果与理论预期吻合得很好，为科学级光学条纹相机的设计以及弱光标定实验室自动化平台的搭建提供了良好的实验依据。

关键词: 科学级CCD, 信噪比, 光子转移曲线, 系统增益

Abstract:

Based on the noise source, considering that the fluctuations of incident photons, dark current and biased signal satisfy the Poisson distribution, the corrected signal-to-noise-ratio (SNR) relation is obtained. On condition that the gain, readout rate and cooling temperature of CCD are set experimentally to be 3, 100kHz and −25°C respectively, the photon transfer curve is obtained. Meanwhile, by setting different experimental conditions，the effect of the dark current, readout rate and the system gain on the SNR of the scientific grade optical CCD is discussed respectively. The experimental results are in good agreement with the theory, which provides the good experimental basis for design of the scientific grade optical streak camera and building of the automated laboratory platform used for weak light calibration.

Key words: Scientific grade CCD, Signal to noise ratio, Photon transfer curve, System gain

中图分类号:

TN386.5

王伶俐，李守贝，张惠鸽，王哲斌，刘浩，张琛，张文海，易有根. 科学级光学CCD信噪比特性分析[J]. 核聚变与等离子体物理, 2014, 34(4): 361-366.

WANG Ling-li, LI Shou-bei,ZHANG Hui-ge,WANG Zhe-bin,LIU Hao,ZHANG Chen,ZHANG Wen-hai,YI You-gen. Performance analysis on SNR of scientific grade optical CCD[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2014, 34(4): 361-366.

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