Conformal phased array aero-optical modeling and compensation

Matthew R. Whiteley; Stanislav V. Gordeyev

doi:10.1117/1.OE.52.7.071409

1 July 2013 Conformal phased array aero-optical modeling and compensation

Matthew R. Whiteley, Stanislav V. Gordeyev

Author Affiliations +

Optical Engineering, Vol. 52, Issue 7, 071409 (July 2013). https://doi.org/10.1117/1.OE.52.7.071409

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 ∗ =15 mm 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 <1 kHz for high-fidelity array performance.

Citation Download Citation

Matthew R. Whiteley and Stanislav V. Gordeyev "Conformal phased array aero-optical modeling and compensation," Optical Engineering 52(7), 071409 (1 July 2013). https://doi.org/10.1117/1.OE.52.7.071409

Published: 1 July 2013

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