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Studies on condenser‐objective lenses
Author(s) -
ALAMIR A. S. A.
Publication year - 1995
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1995.tb03624.x
Subject(s) - condenser (optics) , lens (geology) , optics , scaling , spherical aberration , magnetic lens , chromatic aberration , voltage , materials science , physics , magnetic field , mathematics , geometry , light source , quantum mechanics , chromatic scale
SUMMARY Scaling down the dimensions of a conventional magnetic objective lens to reduce aberrations is studied in detail. The values of other aberration coefficients for optimum lens size corresponding to desired minimum aberration are estimated. The possibility of using iron‐free condenser–objective lenses at high voltage is examined.