基于驱动时序控制CCD曝光时间的设计与实现  

Design and implementation of CCD exposure time control based on driver timing

作　　者：刘慧[1,2] 刘学斌[1] 陈小来[1] 孔亮[1] 刘永征[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2015年第B12期199-204,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(11327303;61405239);中国科学院创新交叉团队(空间高能宇宙辐射的探测与研究团队)项目

摘　　要：针对不带电子快门的帧转移型面阵CCD成像探测器,提出了一种全新的,通过驱动时序控制CCD曝光时间的方法。基于Sarnoff公司的高性能背照式帧转移型面阵CCD传感器,通过软件控制驱动时序信号,将一帧之内多余时间段的电荷迅速排放掉。在系统帧频为100 fps时,测量了曝光时间分别为2、4、6,9.96 ms(全曝光)条件下CCD的输出信号幅值变化情况,并利用Matlab对连续输出100帧图像的平均灰度值进行分析计算。结果表明:该方法有效地实现了CCD曝光时间的控制,且仅通过软件调节,易于实现,可以广泛应用于不带电子快门的帧转移型面阵CCD成像器件。A new method for exposure time control by driver timing was proposed for non-electronic shutter frame transfer area CCD imaging detector. Based on the Sarnoff ′ s back illuminated frame transfer array CCD sensor, the charge will be drained quickly in the excess period, with the driver timing controlled by the software. Selecting exposure time as 2 ms, 4 ms, 6 ms and 9.96 ms, the CCD output signal amplitude was measured under system frame frequency of 100 fps. The gray value of continuous100 frame image calculated by the Matlab. Results show that the method can control the CCD exposure time effectively, and can be implemented by software. It can be widely used in the frame transfer area CCD imaging device without electronic shutter.

关 键 词：曝光时间 电子快门 CCD 驱动时序 控制 

分 类 号：TN386.5[电子电信—物理电子学]