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Proceedings Paper

Results of the second tank trial of the LLNL/NAVSEA underwater laser-imaging system
Author(s): Thomas J. Kulp; Darrel G. Garvis; Randall B. Kennedy; Tom Salmon
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Paper Abstract

This report provides a summary of the second in-water test of the LLNL/NAVSEA Underwater Laser Imaging System (UWLIS). The UWLIS is a laser-based, synchronous-scanning, underwater imaging device that is designed to operate at greater ranges than is possible with conventional underwater TV cameras. It differs from earlier prototype synchronousscanning systems in that it is capable of high scan rates that allow the generation of real-time, RS-170 video images. The UWLIS is being developed for eventual use on Remotely Operated Vehicles (ROVs) during deep-ocean Naval salvage missions. The floodlight-illuminated television cameras presently used on NAVSEA vessels can produce images at ranges up to about 2 attenuation lengths (AL) (2). Beyond that point, common volume backscatter from particulates in the intervening seawater between the imager and the target overwhelms the return signal, and the image is lost. The special optical geometry of the synchronous-scanning imager is designed to minimize common-volume effects. Previous theoretical studies (1) indicate that a system of this type should be capable of operation at distances as great as 6 to 7 attenuation lengths. An improvement of this magnitude would greatly increase the efficiency of salvage operations, thus decreasing their cost.

Paper Details

Date Published: 1 September 1990
PDF: 16 pages
Proc. SPIE 1302, Ocean Optics X, (1 September 1990); doi: 10.1117/12.21487
Show Author Affiliations
Thomas J. Kulp, Lawrence Livermore National Lab. (United States)
Darrel G. Garvis, Lawrence Livermore National Lab. (United States)
Randall B. Kennedy, Lawrence Livermore National Lab. (United States)
Tom Salmon, Naval Sea Systems Command (United States)

Published in SPIE Proceedings Vol. 1302:
Ocean Optics X
Richard W. Spinrad, Editor(s)

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