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Proceedings Paper

Laser Beam Expander-A New Design
Author(s): David R. Shafer
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Paper Abstract

In 1978 the author described a laser beam expander that was unobscured, corrected for spherical aberration, coma, and astigmatism, and consisted of four spherical mirrors. It was not corrected for Petzval curvature, however; therefore the expanded laser beam would defocus slightly if the input beam were not aligned to the system correctly. This paper describes a new design that has just three mirrors, one an aspheric, and that is corrected for spherical aberration, coma, astigmatism, and Petzval curvature. It is also unobscured, and has the very nice feature that the one aspheric mirror is used in a centered fashion: no off-axis section of an aspheric mirror needs to be made. The new design can be realized in any beam expansion ratio that is desired, but performance suffers at very high magnifications. Two representative designs, 4X expansion and 8X expansion, will be shown and discussed, and their performance numbers will be given.

Paper Details

Date Published: 13 November 1980
PDF: 6 pages
Proc. SPIE 0190, Los Alamos Conference on Optics 1979, (13 November 1980); doi: 10.1117/12.957716
Show Author Affiliations
David R. Shafer, The Perkin-Elmer Corporation (United States)

Published in SPIE Proceedings Vol. 0190:
Los Alamos Conference on Optics 1979
Donald H. Liebenberg, Editor(s)

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