First Advisor

Gertrude Rempfer

Term of Graduation

Fall 1992

Date of Publication


Document Type


Degree Name

Doctor of Philosophy (Ph.D.) in Environmental Sciences and Resources: Physics


Environmental Sciences and Resources




Achromatism, Electron optics -- Technological innovations



Physical Description

1 online resource (2, viii, 76 pages)


The theoretical basis for using electron mirrors as correctors of chromatic aberration is presented and an experimental verification of correction of chromatic aberration is demonstrated. A hyperbolic electrostatic electron mirror operating in its converging range and at unity magnification was used as a corrector. A novel separating system with deflections taking place at image planes was developed to implement the mirror without impairing the resolution. Correction was demonstrated in an electron optical probe system. The chromatic aberration was measured by means of the shadows cast by a fine mesh placed near the final image. The experimental method and equipment are described. The experiment serves as a verification of the theory as well as a successful test of the method of separating the electron beams traveling to and from the mirror.


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