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Proceedings Paper

Finite Element Modeling Of Cooled High Energy Laser Optical Elements
Author(s): Lawrence J Schubert
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Paper Abstract

Analysis of convectively cooled optical elements has been traditionally treated by finite element methods (FEM) techniques. NASTRAN, TAP-3, and CINDA are standard programs that have been used for predicting the thermal gradients and resultant distortions of high power laser cooled elements. Due to the high resolution of some optical ray trace codes, thermal/structural analyses using traditional NASTRAN and CINDA FEM are cost-prohibitive. The solution, is therefore, to develop high resolution analytical techniques to reduce cost and still produce the necessary optical distortion required by the optical engineers. Therefore, several thermal/structural codes have been developed to aid in the design and analysis of optical elements. The codes can interface with High Energy Laser (HEL) irradiance maps supplied by optical engineers, solve for the heat exchanger thermal gradients, and establish the necessary boundary conditions for subsequent NASTRAN FEM. The codes have been successfully used with irradiance maps with moderately large array sizes. Their use in predicting wavefront distortion has been verified through thermal testing.

Paper Details

Date Published: 5 January 1984
PDF: 8 pages
Proc. SPIE 0450, Structural Mechanics of Optical Systems I, (5 January 1984); doi: 10.1117/12.939268
Show Author Affiliations
Lawrence J Schubert, Hughes Aircraft Company (United States)

Published in SPIE Proceedings Vol. 0450:
Structural Mechanics of Optical Systems I
Lester M. Cohen, Editor(s)

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