| 发明名称 |
X-ray to visible image converter with a cathode emission layer having non-uniform density profile structure |
| 摘要 |
High quantum efficiency (>/=5%) ultrafast (</=100 picosecond) and broad band (30 KeV to 80 KeV for medical application) X-ray photo-electron cathode, high gain X-ray real time image intensifier and portable low intensity real time projection type X-ray imagescope use new vacuum photo-electron devices. A new type X-ray photo-electron cathode has a specially designed alkali halide electron emission layer that makes possible high quantum efficiency, high speed and broad band X-ray photon detection. An X-ray photo-electron cathode followed by a direct coupled micro channel plate and an output phosphor display screen form a new type panel shaped direct view X-ray intensifier tube which can have both high spatial resolution (>/=10 lp/mm) and high gain (>/=104). The thickness of this panel shaped disc X-ray intensifier can be less than 1 cm. A portable real time projection X-ray imagescope which employs this new type X-ray intensifier and other devices (small x-ray tube, small built-in high voltage power supply) can be widely used for medical, industrial and security applications.
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| 申请公布号 |
US5225670(A) |
申请公布日期 |
1993.07.06 |
| 申请号 |
US19910665474 |
申请日期 |
1991.03.06 |
| 申请人 |
CSL OPTO-ELECTRONICS CORP. |
发明人 |
SHE, YANGZHENG;CAO, WEILOU;YANG, XIAOWEN;ZHEN, SHIZHENG;LU, XINAN;WANG, HANPING;LI, MING-GUANG;SHIH, YANHUA |
| 分类号 |
G01T1/28;H01J1/34;H01J31/50 |
主分类号 |
G01T1/28 |
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