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Proceedings Paper

Characterization of turbulent atmospheric-induced optical distortion by passive phase diversity techniques
Author(s): Lewis F. DeSandre; Peter Langston; Joni M. Pentony; C. Denton Marrs; Albert A. Ogloza
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Paper Abstract

Optical fields propagation through the Earth's turbulent atmosphere are subject to time varying phase distortions. These phase distortions place severe limitations on electro- optical systems, such as imaging, tracking and vibrometry sensors. The generation of artificial beacons by laser backscatter (guide stars) for wavefront sensing may not be acceptable and natural beacons for wavefront sensing may not be available. Diversity techniques, however, allow passive wavefront measurement of the aberrated wavefront. This paper reports a phase diversity method based upon the transport- of-intensity equation for recovering phase from irradiance measurements. Digitized intensity data over a rectangular array of data is expanded into Zernike polynomials and a matrix method used to solve the transport-of-intensity equation. The phase diversity technique is evaluated in the pupil as well as the focal plane. Simulation and experimental data is provided.

Paper Details

Date Published: 4 September 2001
PDF: 16 pages
Proc. SPIE 4376, Laser Weapons Technology II, (4 September 2001); doi: 10.1117/12.438175
Show Author Affiliations
Lewis F. DeSandre, Naval Air Warfare Ctr. (United States)
Peter Langston, Naval Air Warfare Ctr. (United States)
Joni M. Pentony, Naval Air Warfare Ctr. (United States)
C. Denton Marrs, Naval Air Warfare Ctr. (United States)
Albert A. Ogloza, Naval Air Warfare Ctr. (United States)


Published in SPIE Proceedings Vol. 4376:
Laser Weapons Technology II
William E. Thompson; Paul H. Merritt, Editor(s)

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