TDICCD相机的实验与研究

Experiment and Research of TDI CCD Camera

目前，ＣＣＤ已被广泛地应用于各个领域。这里，我们介绍一种特殊的线阵ＣＣＤ相机，它应用时间延迟积分（ＴＤＩ）技术，可在低光照情况下，获得高灵敏度、高输出速率、高空间分辨率和大的动态范围。为了应用ＴＤＩ方式及验证它的效果，我们使用加拿大ＤＡＬＳＡ公司生产的ＣＴ－Ｅ１２０４８×９６ＴＤＩ线阵ＣＣＤ相机，设计制作了一套完整的系统，并做了捕获运动图像的实验。该系统包括：相机、相机控制器、图像捕获器、微机和转台。实验结果表明：当ＣＣＤ相机的行转移速率和物体的运动速率不同步时，不能够获得清晰的图像。而当我们使用相移补偿技术，使两个速率相匹配后，得到了非常清晰的图像。

At present,CCD is widely applied in many fields.Here,we introduce you a special linear area CCD camera which use Time Delay Integration(TDI) technique to provide high sensitivity,high speed,high spatial resolution and wide dynamic range performance under low light condition.In order to apply the TDI method and verify the effect,we do an experiment of grabbing moving image using CT E1 2048X96 TDI Line Scan CCD camera produced by DALSA INC..We design a grabber and make a complete system .Which includes:Camera,Camera Control,Frame Grabber,Rolling platform,PC.The result indicates that when the line shift rate of the CCD camera is not synchronized with the rate of moving object,the image that we obtain is not clear.But when we use phase shift compensation technique and make the line shift rate of the camera match the rate of the image,we can get very distinct image.