Special Section on Aero-Optics and Adaptive Optics for Aero-Optics

Conformal phased array aero-optical modeling and compensation

[+] Author Affiliations
Matthew R. Whiteley

MZA Associates Corporation, 1360 Technology Ct., Suite 200, Dayton, Ohio 45430

Stanislav Gordeyev

University of Notre Dame, Institute for Flow Physics and Control, Indiana, 46556

Opt. Eng. 52(7), 071409 (Feb 28, 2013). doi:10.1117/1.OE.52.7.071409
History: Received October 29, 2012; Revised January 25, 2013; Accepted January 25, 2013
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Abstract.  The effect of subsonic turbulent boundary layer aero-optical disturbances on a conformal phased array for laser beam projection operating on a high-speed aircraft is considered. We employ a basic model for subsonic boundary layer disturbances developed by Cress et al. which is governed by the displacement thickness δ* to bound the magnitude of the problem, to determine the basic phenomenology affecting phased array performance, and to quantify requirements for compensation of these disturbances in the array subapertures. We used δ*=15mm as a baseline value in quantifying phased array effects on a 7-aperture hexagonal array with 10 cm subapertures. Boundary layer piston and tilt disturbances dominate array effects, but higher-order disturbances are similar in magnitude to the differential piston over the array and 2× greater in magnitude than an upper bound on free-stream turbulence. Adaptive optics compensation of turbulent boundary layer disturbances in such a phased array requires error rejection bandwidths >1kHz for high-fidelity array performance.

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© 2013 Society of Photo-Optical Instrumentation Engineers

Citation

Matthew R. Whiteley and Stanislav Gordeyev
"Conformal phased array aero-optical modeling and compensation", Opt. Eng. 52(7), 071409 (Feb 28, 2013). ; http://dx.doi.org/10.1117/1.OE.52.7.071409


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