获取高速运动目标清晰图象的方法和装置

目前的高速摄影象机大多由CCD摄象机以及外加的机械快门或电子快门组成若能直接开发CCD本身的电子快门特性而不再需要外加快门,将会受到人们欢迎。 本文提出了开发CCD自身快门特性的方法:即从缩短摄象机每场的“有用光积分”时间入手,使缩短的场积分脉冲起电子快门作用。与此同时须采用“底板清洗”方法清除掉每场中除“有用积分”之外的其余时间的“无用积分”电荷,使“有用积分”电荷建立在清洗过的洁白的底板上。从而实现将普通CCD摄象机改为自带电子快门的高速摄象机。 对新开发的高速摄象机的性能作了分析之后,提出了两个应用实例。特别是利用本摄象机拍摄高速旋转体时,可以直接获得旋转变得缓慢甚至相对静止的清晰图象,而不再需要借助录相机进行快拍慢放

METHODS AND APPARATUS FOR OBTAINING CLEAR IMAGES OF HIGH SPEED MOVING OBJECTS

Most of the present high speed pickup cameras consist of a CCD pickup camera and an addi tional mechanical shutter or electronic shutter. It is well accepted to develop the CCD's own shutter function directly without an additional shutter.In this paper is presented a method to develop the CCD's own shutter funetion.It starts with shortening the useful charge integrating" time of the pickup camera per field for the shortened field integrating pulse to act as the electronie shutter. At the same time, the 'useless integrating char ge " except the "useful integrating time per field must he cleared by the method of' "photographte plate clearing" to set the "useful integrating" charge on the clean photographic plate which has been cleared, thus accomplishing the transformation of an ordinary CCD pickup camera into a high speed pickup camera with its own electronic shutter.After analysing the performance of the newly-developed high speed pickup camera, two examples of the application are given, especially when this pickup camera is used to take a picture of a body which spins at high speed, a clear, slowly spining or even ralatively still image can be obtained directly and it is unnecessary to shoot quickly and play slowly with the aid of a vidcocorder.