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Proceedings Paper

Design of optical structures for maximum fundamental frequency
Author(s): Keith B. Doyle
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Paper Abstract

A procedure to maximize the fundamental frequency of optical structures is presented. The optimization method uses the finite element stresses due to the mechanical loading and the free-vibration mode shapes to determine design coefficients for the elements. Design coefficients are used to modify an initial design following an iterative procedure. This method of optimal structural design, referred to here as the Maximum Stiffness Design (MSD), is demonstrated by increasing the fundamental frequency of a support structure for a beam collapser and a telescope. Furthermore, the optimization technique is used to develop optimum contour shapes for single arch and double arch mirrors. A sixteen inch diameter solid mirror blank with a four inch diameter central hole and a 48 inch optical surface radius of curvature is optimized for maximum fundamental frequency, minimum weight, and minimum rms surface error for both single arch and double arch configurations.

Paper Details

Date Published: 16 September 1993
PDF: 10 pages
Proc. SPIE 1998, Optomechanical Design, (16 September 1993); doi: 10.1117/12.156630
Show Author Affiliations
Keith B. Doyle, Optical Sciences Ctr./Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 1998:
Optomechanical Design
Daniel Vukobratovich; Paul R. Yoder; Victor L. Genberg, Editor(s)

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