Anticontaminator for transmission electron microscopes

Details Anticontaminator for transmission electron microscopes Anticontaminator for transmission electron microscopes

1987-11-03

1989-05-23

Fields, Carolyn E.

Radiant energy

Inspection of solids or liquids by charged particles

Analyte supports

2504421, 62 511, H01J 3720

Patent

active

048333301

ABSTRACT:
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.

REFERENCES:
patent: 3124680 (1964-03-01), Van Dorsten et al.
patent: 3373277 (1968-03-01), Heide
patent: 3611746 (1971-10-01), Marsing et al.
patent: 3624390 (1971-11-01), Watanabe

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