EBCCD的增益及信噪比研究

Research of gain and SNR of EBCCD

以背照明减薄CCD为基础的微光成像系统 ,可以得到视频信号速率的输出。这种减薄的电子轰击CCD探测系统 (EBCCD)在微光下的性能大大超过了像增强器耦合的CCD探测系统 (ICCD)。EBCCD能在微光条件下产生高对比度、高分辨力的视频信号。可以预料 ,它将在工业应用、军事应用及科学研究工作中取代通常使用的ICCD。详细讨论了影响EBCCD的增益及信噪比的各种因素。结果表明 ,若适当提高阴极和CCD之间的电压 ,减小CCD基片的厚度 ,可以进一步减小EBCCD的噪声 。

A new kind of video rate images based on back illuminated and thinned CCDs is available that shows promise to replace conventional image intensifiers for military, industrial, and scientific applications. Thinned electron bombarded CCDs offer low light level performance superior to conventional image intensifier coupled CCD approaches. This new, high performance device provides high contrast, high resolution in low light level surveillance imaging.The factors to influence the EBS gain, and the source of noise are presented in single electron detection.