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Proceedings Paper

Computational methods to compute wavefront error due to aero-optic effects
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Paper Abstract

Aero-optic effects can have deleterious effects on high performance airborne optical sensors that must view through turbulent flow fields created by the aerodynamic effects of windows and domes. Evaluating aero-optic effects early in the program during the design stages allows mitigation strategies and optical system design trades to be performed to optimize system performance. This necessitates a computationally efficient means to evaluate the impact of aero-optic effects such that the resulting dynamic pointing errors and wavefront distortions due to the spatially and temporally varying flow field can be minimized or corrected. To this end, an aero-optic analysis capability was developed within the commercial software SigFit that couples CFD results with optical design tools. SigFit reads the CFD generated density profile using the CGNS file format. OPD maps are then created by converting the three-dimensional density field into an index of refraction field and then integrating along specified paths to compute OPD errors across the optical field. The OPD maps may be evaluated directly against system requirements or imported into commercial optical design software including Zemax® and Code V® for a more detailed assessment of the impact on optical performance from which design trades may be performed.

Paper Details

Date Published: 27 September 2013
PDF: 9 pages
Proc. SPIE 8840, Optical Modeling and Performance Predictions VI, 88400A (27 September 2013); doi: 10.1117/12.2024065
Show Author Affiliations
Victor Genberg, Sigmadyne, Inc. (United States)
Gregory Michels, Sigmadyne, Inc. (United States)
Keith Doyle, MIT Lincoln Lab. (United States)
Mark Bury, MIT Lincoln Lab. (United States)
Thomas Sebastian, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 8840:
Optical Modeling and Performance Predictions VI
Mark A. Kahan; Marie B. Levine, Editor(s)

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