13 May 2016 Passive adaptive imaging through turbulence
Author Affiliations +
Standard methods for improved imaging system performance under degrading optical turbulence conditions typically involve active adaptive techniques or post-capture image processing. Here, passive adaptive methods are considered where active sources are disallowed, a priori. Theoretical analyses of short-exposure turbulence impacts indicate that varying aperture sizes experience different degrees of turbulence impacts. Smaller apertures often outperform larger aperture systems as turbulence strength increases. This suggests a controllable aperture system is advantageous. In addition, sub-aperture sampling of a set of training images permits the system to sense tilts in different sub-aperture regions through image acquisition and image cross-correlation calculations. A four sub-aperture pattern supports corrections involving five realizable operating modes (beyond tip and tilt) for removing aberrations over an annular pattern. Progress to date will be discussed regarding development and field trials of a prototype system.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David Tofsted, "Passive adaptive imaging through turbulence", Proc. SPIE 9833, Atmospheric Propagation XIII, 98330B (13 May 2016); doi: 10.1117/12.2225114; https://doi.org/10.1117/12.2225114


KAPAO a MEMS based natural guide star adaptive optics...
Proceedings of SPIE (March 05 2013)
The low order wavefront control system for the PICTURE C...
Proceedings of SPIE (September 01 2017)
Deformable mirrors development program at ESO
Proceedings of SPIE (July 26 2016)
360-deg panoramic camera using a mirror rotation mechanism
Proceedings of SPIE (December 29 2000)
Closed-loop control of magnetic fluid deformable mirrors
Proceedings of SPIE (August 04 2009)

Back to Top