Field emission microscope

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Description

A unique microscope, invented in 1951, that requires no lens system. In a field emission microscope, a positively charged specimen is placed in a glass chamber with a strong electrostatic field. Positively charged ions in the chamber are repelled by the sample and attracted to a negatively charged fluorescent screen producing an image of the atomic structure in the specimen. Magnifications of one million times have been obtained.

Synonyms and Related Terms

field ion microscope; Feldemissionsmikroskop (Deut.)

Sources Checked for Data in Record

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • ASTM, Standard Terminology of Microscopy, Annual Book of ASTM Standards, Section 14, General Methods and Instrumentation, ASTM, E175, 75-78, May 1982