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Proceedings Paper

Passive athermalization: required accuracy of the thermo-optical coefficients
Author(s): John R. Rogers
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Paper Abstract

Passive athermalization requires that the materials (both optical and mechanical) and optical powers be carefully selected in order for the image to stay adequately in focus at the plane of the detector as the various materials change in physical dimension and refractive index. For a large operational temperature range, the accuracy of the thermo-optical coefficients (dn/dT coefficients and the Coefficients of Thermal Expansion) can limit the performance of the final system. Based on an example lens designed to be passively athermalized over a 200°C temperature range, and using a Monte Carlo analysis technique, we examine the accuracy to which the expansion coefficients and dn/dT coefficients of the system must be known.

Paper Details

Date Published: 17 December 2014
PDF: 9 pages
Proc. SPIE 9293, International Optical Design Conference 2014, 92931A (17 December 2014); doi: 10.1117/12.2074674
Show Author Affiliations
John R. Rogers, Synopsys, Inc. (United States)


Published in SPIE Proceedings Vol. 9293:
International Optical Design Conference 2014
Mariana Figueiro; Scott Lerner; Julius Muschaweck; John Rogers, Editor(s)

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