发明授权
- 专利标题： Electron gun
- 专利标题（中）： 电子枪
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申请号： US189908申请日： 1980-09-23
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公开(公告)号： US4363995A公开(公告)日： 1982-12-14
- 发明人: Tadahiro Takigawa , Isao Sasaki , Kazuo Tsuji
- 申请人： Tadahiro Takigawa , Isao Sasaki , Kazuo Tsuji
- 申请人地址： JPX Kawasaki JPX Tokyo
- 专利权人： Tokyo Shibaura Denki Kabushiki Kaisha,Toshiba Machine Company Limited
- 当前专利权人： Tokyo Shibaura Denki Kabushiki Kaisha,Toshiba Machine Company Limited
- 当前专利权人地址： JPX Kawasaki JPX Tokyo
- 优先权： JPX54-123686 19790926
- 主分类号： H01J1/15
- IPC分类号： H01J1/15 ; H01J1/16 ; H01J3/02 ; H01J37/06 ; H01J1/14
摘要：
An electron gun having a cathode of a lanthanum hexaboride single crystal is disclosed in which the axis of the cathode is set to such a crystal orientation that the electron beam has two intensive emission regions which are asymmetrical with each other in intensity. In the electron gun, even at a low heating temperature of the cathode, a single spot of an image by the electron beam of a more intensive emission region since the electron beam of a weaker intensity emission region is blocked by an aperture.
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