发明名称 |
Anticontaminator for transmission electron microscopes |
摘要 |
An improved electron microscope anticontaminator having a conduction rod enclosed within an independent vacuum system and micropositioning capability is described. The micropositioning facility allows the use of unusually small apertures in the cold anticontaminator block with a consequent improvement in efficiency of function. A self-contained contact sensor provides immediate audible warning of contact between a specimen holder and the cold anticontaminator block, permitting the removal of the usual mechanical end-stops for the specimen tilt mechanism and allowing the maximum specimen movement possible at any time. The independent vacuum system in combination with a heater positioned close to the anitcontaminator block allows the microscopist to vent the microscope column without removing the anticontaminator from the microscope. Special anticontaminator blocks incorporating multiple apertures or an X-ray collimator eliminate the need for separate microscope objective aperture or X-ray collimator mechanisms and also ease design constraints imposed by the very limited space around specimens in high resolution microscopes.
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申请公布号 |
US4833330(A) |
申请公布日期 |
1989.05.23 |
申请号 |
US19870116039 |
申请日期 |
1987.11.03 |
申请人 |
GATAN INC. |
发明人 |
SWANN, PETER R.;JONES, JOSEPH S. |
分类号 |
H01J37/02 |
主分类号 |
H01J37/02 |
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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