METHODS AND APPARATUS FOR OBTAINING CLEAR IMAGES OF HIGH SPEED MOVING OBJECTS
获取高速运动目标清晰图象的方法和装置

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.