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Proceedings Paper

Contact stresses and their optical effects in biconvex optical elements
Author(s): Kevin A. Sawyer
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Paper Abstract

Stress analyses by the finite element and theory of elasticity methods are used to predict the stress fields and intensities in biconvex lenses subject to the contact forces of mounting. In particular, the effects of contact stresses produced by retainer rings are investigated. Typical retainer ring geometries are utilized in the study. Stress distribution data are related to the stress birefringent characteristics of glass, and the effects of mounting forces on the performance of optical elements are predicted. Optical retardation due to stress birefringence as a function of lens radius is presented in graphical form. Results of the numerical analyses are verified by the photoelastic method. Effects on lenses using typical mounting methods are investigated and compared to the analytic predictions. Experimental results correlate well with the analytical predictions. Results of this research indicate that properly designed and constructed retainer ring mounts produce localized stress birefringence effects which occur only in the area of contact.

Paper Details

Date Published: 6 September 1995
PDF: 12 pages
Proc. SPIE 2542, Optomechanical and Precision Instrument Design, (6 September 1995); doi: 10.1117/12.218681
Show Author Affiliations
Kevin A. Sawyer, NASA Ames Research Ctr. (United States)

Published in SPIE Proceedings Vol. 2542:
Optomechanical and Precision Instrument Design
Alson E. Hatheway, Editor(s)

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