公开(公告)号：US4809071A

公开(公告)日：1989-02-28

申请号：US941641

申请日：1986-12-15

申请人： Hisatake Yokouchi ,  Masanori Maruyama ,  Fumitaka Takahashi ,  Masayuki Tsuneoka

发明人： Hisatake Yokouchi ,  Masanori Maruyama ,  Fumitaka Takahashi ,  Masayuki Tsuneoka

IPC分类号： H01J29/08 ,  H04N5/32 ,  H04N5/34 ,  H01J31/38

CPC分类号： H01J29/08 ,  H04N5/32

摘要： A television camera device for obtaining an image of high resolution by making the number of scanning lines on the target plate of an image pickup tube about twice larger than that in the television standard system and making the scanning speed of electron beam at the surface of the target plate smaller than that in the television standard system, is disclosed in which an electric field intensity in a region between the target plate and a mesh electrode (namely, the fourth grid electrode) is made greater than or equal to 5.3 KV/cm, to improve the landing characteristics of scanning electron beam, thereby preventing the occurrence of the water fall phenomenon peculiar to a slow scanning operation.

摘要翻译： 一种电视照相机装置，用于通过使图像拾取管的目标板上的扫描线数量大于电视标准系统中的扫描线数量的两倍而获得高分辨率的图像，并使电子束的扫描速度在 目标板比电视标准系统小的目标板，其中目标板和网格电极（即第四栅极）之间的区域中的电场强度大于或等于5.3KV / cm， 以改善扫描电子束的着陆特性，从而防止慢扫描操作特有的水落下现象的发生。