Method of and apparatus for making electron-micrographs of opaque metallographic specimens
United States Patent 2614223
US Patent References:
Correction for spherical and chromatic aberrations in electron lenses
- - 2401315
Correction for spherical and chromatic aberrations in electron lenses
- - 2401315
Inventors:
Ramberg, Edward G.
Publication Date:
10/14/1952
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Assignee:
RCA CORP
Primary Class:
International Classes:
H01J37/29; H01J37/26