(3)同步在X线电视中,同步的含意就是要使摄象端的电子束扫描与显象端的电子束扫描在频率上和相位上完全一致。摄象端和显象端的电子束扫描,不论在频率上或者在相位上一有差异,在电视荧光屏上就无法重现所摄的X线影象,严重时可变得杂乱无章,难以辨认。图11为一失去同步的图象,(a)为摄象端的图象;(b)为显象端的图象,它比摄象端慢了半行;(c)为显象端的图象,它比摄象端慢了半场。 (3) synchronization In the X-ray television, the meaning of synchronization is to make the camera end of the electron beam scanning and imaging end of the electron beam scanning in frequency and phase exactly the same. Electron beam scanning at the camera side and the imaging side can not reproduce the X-ray image on the TV screen in frequency or in phase, and can become cluttered and illegible in severe cases. Fig. 11 is an image with no synchronization, Fig. 11 (a) is the image of the camera side; (b) is the image of the display side which is half a line slower than the camera side; (c) It is half a film slower than the camera.