发明授权
- 专利标题: Vidicon type camera tube
- 专利标题(中): Vidicon型相机管
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申请号: US215335申请日: 1980-12-11
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公开(公告)号: US4363996A公开(公告)日: 1982-12-14
- 发明人: Masashi Mizushima , Masanori Maruyama , Shigeru Ehata , Masakazu Fukushima
- 申请人: Masashi Mizushima , Masanori Maruyama , Shigeru Ehata , Masakazu Fukushima
- 申请人地址: JPX Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX54-164058 19791219
- 主分类号: H01J29/48
- IPC分类号: H01J29/48 ; H01J29/52 ; H01J29/46 ; H01J29/56 ; H01J31/38
摘要:
A vidicon type camera tube comprising a beam current control section including a thermionic cathode, a first grid having an aperture of diameter d.sub.1, a second grid having an aperture of diameter d.sub.2 and a beam disc having a diaphragm of diameter d.sub.3 disposed at a distance of l along the tube axis from the second grid. The tube further comprises a main lens section constituted of cylindrical electrodes. The diameters d.sub.1, d.sub.2 and d.sub.3 and the distance l are so determined that the value of (d.sub.2 /l)(d.sub.3 /d.sub.1).sup.2 may lie in the range where the difference of the effective cathode loading is positive.
公开/授权文献
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