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Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
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Published on: September 20, 2024

Historical aspects of aberration correction.

Harald H Rose1

  • 1University of Darmstadt, Darmstadt, Germany. harald.rose@physik.tu-darmstadt.de

Journal of Electron Microscopy
|March 4, 2009
PubMed
Summary
This summary is machine-generated.

Direct aberration correction in electron microscopy, a 50-year challenge, achieved genuine atomic resolution in 1997. This breakthrough, alongside new analytical tools, enables atomic-scale elemental and electronic analysis.

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Area of Science:

  • Physics
  • Materials Science
  • Microscopy

Background:

  • Electron microscopy resolution was historically limited by unavoidable aberrations in round electron lenses.
  • The Scherzer theorem (1936) provided theoretical groundwork for aberration correction.
  • Decades of research were dedicated to overcoming these resolution-limiting factors.

Purpose of the Study:

  • To outline the historical development of direct aberration correction in electron microscopy.
  • To highlight the significance of achieving atomic resolution.
  • To describe the integration of advanced analytical capabilities.

Main Methods:

  • Historical review of aberration correction efforts in electron microscopy.
  • Discussion of the theoretical basis (Scherzer theorem).
  • Integration of advanced components like monochromators and energy filters.

Main Results:

  • Successful aberration correction breakthrough in 1997.
  • Achieved genuine atomic resolution, approaching the scale of the hydrogen atom radius.
  • Development of analytical electron microscopes with atomic-scale elemental and electronic information.

Conclusions:

  • Direct aberration correction represents a quantum leap in electron microscopy.
  • The technology enables unprecedented atomic-scale imaging and analysis.
  • New generations of microscopes offer advanced elemental and electronic characterization capabilities.