Radiant energy – Inspection of solids or liquids by charged particles – Electron microscope type
Patent
1982-08-24
1984-12-11
Anderson, Bruce C.
Radiant energy
Inspection of solids or liquids by charged particles
Electron microscope type
2504911, G01N 2300
Patent
active
044880430
ABSTRACT:
A tomographic marking device is disposed in an electron microscope between a goniometer stage for holding a specimen and a fluorescent screen for displaying a magnified image of the specimen. The device comprises an externally geared, ring wheel, having a pair of spaced-apart, colinearly disposed pins fixed to the inner periphery of the wheel and defining a straight line parallel to both the screen and the tilt axis of rotation of the goniometer stage. Because the magnetic lenses of the microscope rotate the magnified image on the screen, means are provided to rotate the wheel and to indicate the position of angular rotation of the tilt axis of the goniometer stage located on the screen relative to the actual tilt axis of the goniometer stage.
REFERENCES:
patent: 1404171 (1922-01-01), Waite
patent: 2623180 (1952-12-01), Zurli et al.
patent: 3702399 (1972-11-01), Lucas
"Instrumentation for the Three-Dimensional Reconstruction of Cellular Orglles by Electron Microscopy", Bahr et al., Ultramicroscopy, 6, pp. 251-258, Sep. 8, 1981.
Bahr Gunter F.
Schell Barry E.
Anderson Bruce C.
Bellamy Werten F. W.
Raubitschek John H.
Spechler Arthur I.
The United States of America as represented by the Secretary of
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