| 黄景昊,邹旸,邹树梁,徐守龙.低剂量γ辐射对视频品质的影响及其改善方法[J].南华大学学报(自然科学版),2016,30(4):1~5.[HUANG Jing-hao,ZOU Yang,ZOU Shu-liang,XU Shou-long.Effect of Low Dose Gamma Radiation on Video Quality andImprovement Methods[J].Journal of University of South China(Science and Technology),2016,30(4):1~5.] |
| 低剂量γ辐射对视频品质的影响及其改善方法 |
| Effect of Low Dose Gamma Radiation on Video Quality andImprovement Methods |
| 投稿时间：2016-06-12 |
| DOI： |
| 中文关键词: γ射线 电离辐射效应 CMOS图像传感器 视频品质 |
| 英文关键词:γ-ray ionizing radiation effect CMOS image sensor video quality |
| 基金项目:湖南省重大专项基金资助项目(2012FJ1007);湖南省研究生科研创新基金资助项目(2015SCX02) |
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| 中文摘要: |
| 利用60Coγ放射源对CMOS图像传感器进行辐照实验,结合其损伤机理分析造成视频画面品质下降的影响因素,并初步提出改善方法.对所采集监控画面的平均亮度及R、G、B三种色彩通道强度的变化进行了分析.实验结果表明,CMOS图像传感器在辐照剂量率为5 Gy/h时随着累积剂量的增大,监控画面的平均亮度增大,噪点增多且发生绿色色偏.可以通过如下方法改善视频品质:将传感器部分与信号处理部分分离并加装外层屏蔽体；采用浅槽隔离结构与耗尽区相隔离且有较低夹断电压的光电二极管结构；通过程序调节色彩平衡. |
| 英文摘要: |
| Irradiation experiments of CMOS image sensor have been presented by 60Co γ-ray resource.Influence factors of video quality degradation were analyzed by damage mechanism.And the improvement methods about reduced radiation effect were put forward.The average brightness and color channel intensity of the collected monitoring frame have been analyzed by irradiation experiments.As the results showed,the average brightness and the number of noisy point of monitoring frame increased with the total ionizing dose increasing,also with green color cast.Irradiation effect of CMOS image sensor monitoring frame could be improved by the methods as follows:separating sensor part from the signal processing part,adding radiation shielder;using the radiation resistance photodiode with shallow trench isolation and lower pinch off voltage.Color balance could also be adjusted by software program. |
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