The effect of lens aberrations on lattice images of spinodally decomposed alloys

John Spence, J. M. Cowley, R. Gronsky

Research output: Contribution to journalArticle

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Abstract

Lattice fringe images obtained with a high resolution electron microscope have been used to investigate the periodic variation of lattice spacing associated with the spinodal decomposition of some alloys. It is shown that the variation of fringe spacing seen in the image can exceed the actual variation of lattice fringe spacing in the specimen by a large factor as a result of phase variations associated with the transfer function of the objective lens. This modification of the fringe spacing is minimized, although not eliminated, for a particular value of the objective lens defocus.

Original languageEnglish (US)
Pages (from-to)429-433
Number of pages5
JournalUltramicroscopy
Volume4
Issue number4
DOIs
StatePublished - 1979

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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