发明名称 |
Bifocal cathode for X=ray tube e.g. in medical X=ray scanner - has central tungsten filament with other two filaments symmetrically placed, and whole structure situated inside metallic piece which focuses beam |
摘要 |
The cathode includes a filament (7) made of wolfram and having a circular section. The filament has a number of turns with a variable thread with its extremities presenting a reduced thread to compensate for thermal losses. The cathode generates an X-ray beam which has a high density. The cathode filament is placed inside a metallic piece which focuses the beam generated. Two other filaments are placed symmetrically relative to the first filament. ADVANTAGE - Ensures good alignment of cathode and anode with uniform distribution of energy.
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申请公布号 |
FR2699326(A1) |
申请公布日期 |
1994.06.17 |
申请号 |
FR19920014974 |
申请日期 |
1992.12.11 |
申请人 |
GENERAL ELECTRIC CGR |
发明人 |
GUERIN CHRISTINE;BLIN PHILIPPE;COQUOZ OLIVIER |
分类号 |
H01J35/06;(IPC1-7):H01J35/06;H01J1/22 |
主分类号 |
H01J35/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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