摘要
利用532nm连续激光辐照以东芝TCD1200D型线阵CCD为图像传感器的扫描相机进行实验,在相机输出视频中发现了光斑拖尾的现象,拖尾有限长、全饱和并且仅在光斑一侧。分析排除了光分布造成拖尾的可能原因。其单侧、有限长的特点不符合像素溢出或漏光造成的拖尾,而与转移损失造成的拖尾一致。但其全饱和的特点,不符合目前转移损失率的常数模型。针对当前体沟道CCD的内部结构和工作原理,提出了一种转移损失率随电荷量变化的模型,对新发现的全饱和单侧拖尾进行了解释。
In the video of linear CCD camera being irradiated by 532 nm CW laser, the entirely saturated unilateral smear of laser spot was found. The smear area does not represent the distribution of laser. Since this smear lies merely in one side of laser spot, it can not be induced by light leaking or carriers blooming, and it may be induced by charge transfer loss. However, the feature that the smear area is entirely saturated can not be explained by the current constant model of charge transfer inefficiency. Based on the inner structure and operating principle of buried channel CCD, a new model of charge transfer inefficiency that varies with charge quantity is proposed, which can explain the entirely saturated unilateral smear of laser spot.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第6期1351-1353,共3页
High Power Laser and Particle Beams
基金
激光与物质相互作用国家重点实验室创新基金项目(SKL111101)
关键词
激光光斑
体沟道CCD
全饱和单侧拖尾
电荷转移损失率
laser spot, buried channel CCD, entirely saturated unilateral smear, charge transfer inefficiency
