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Proceedings Paper

Recent Underwater Range-Gated Measurements
Author(s): T. Keil; A. Immarco; M. Kerpchar
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Paper Abstract

Ranges obtainable in underwater viewing are severely limited by backscattering. Increased ranges are possible by means of the range-gating technique, which gates out most of the unwanted backscattering electronically. Tests were conducted in filtered fresh water to determine the performance of a range-gating system and the characteristics of water in terms of image quality or resolution. A pulsed blue-green laser source and a highly sensitive receiver were used. Results indicate that range-gated systems are effective for underwater viewing up to 131 feet with good resolution. Comparison tests in a laser-illuminated ungated mode, a back-illuminated mode, and a front-illuminated mode were conducted concurrently.

Paper Details

Date Published: 1 August 1968
PDF: 12 pages
Proc. SPIE 0012, Underwater Photo-Optical Instrumentation Applications II, (1 August 1968); doi: 10.1117/12.946728
Show Author Affiliations
T. Keil, Naval Undersea Warfare Center (United States)
A. Immarco, Kollsman Instrument Corporation (United States)
M. Kerpchar, Kollsman Instrument Corporation (United States)

Published in SPIE Proceedings Vol. 0012:
Underwater Photo-Optical Instrumentation Applications II
Charles N. DeMund, Editor(s)

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