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Proceedings Paper

Retrofocus Optics For The Focussing Of CO[sub]2[/sub] - Laser Radiation: A Comparison Between Designs Using Spherical Optics And Aspherics
Author(s): L. H. J. F. Beckmann; J. L. F. de Meijere
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Paper Abstract

In applications of high power CO2-lasers which require very high power concentration and thus wide aperture focussing optics, the use of retrofocus type optical systems is advantageous in that it allows relatively long distances between the focus and the last optical surface. Relative apertures around f/1.2 have been achieved with diffraction limited systems consisting of a single negative and (symmetrical) dual positive lens elements made from ZnSe. An alternative approach combines the dual positive lenses in to a single aspheric element. The practical consequenses and tradeoffs are discussed.

Paper Details

Date Published: 24 March 1989
PDF: 4 pages
Proc. SPIE 1020, High Power CO2 Laser Systems and Applications, (24 March 1989); doi: 10.1117/12.950064
Show Author Affiliations
L. H. J. F. Beckmann, Oldelft (Netherlands)
J. L. F. de Meijere, Oldelft (Netherlands)

Published in SPIE Proceedings Vol. 1020:
High Power CO2 Laser Systems and Applications
A. Quenzer, Editor(s)

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