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Proceedings Paper

Atmospheric simulation using a liquid crystal wavefront-controlling device
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Paper Abstract

Test and evaluation of laser warning devices is important due to the increased use of laser devices in aerial applications. This research consists of an atmospheric aberrating system to enable in-lab testing of various detectors and sensors. This system employs laser light at 632.8nm from a Helium-Neon source and a spatial light modulator (SLM) to cause phase changes using a birefringent liquid crystal material. Measuring outgoing radiation from the SLM using a CCD targetboard and Shack-Hartmann wavefront sensor reveals an acceptable resemblance of system output to expected atmospheric theory. Over three turbulence scenarios, an error analysis reveals that turbulence data matches theory. A wave optics computer simulation is created analogous to the lab-bench design. Phase data, intensity data, and a computer simulation affirm lab-bench results so that the aberrating SLM system can be operated confidently.

Paper Details

Date Published: 12 October 2004
PDF: 11 pages
Proc. SPIE 5553, Advanced Wavefront Control: Methods, Devices, and Applications II, (12 October 2004); doi: 10.1117/12.562447
Show Author Affiliations
Matthew R. Brooks, Air Force Research Lab. (United States)
Matthew E. Goda, Air Force Institute of Technology (United States)

Published in SPIE Proceedings Vol. 5553:
Advanced Wavefront Control: Methods, Devices, and Applications II
John D. Gonglewski; Mark T. Gruneisen; Michael K. Giles, Editor(s)

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