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Proceedings Paper

Instrument for underwater measurement of optical backscatter
Author(s): Robert A. Maffione; David R. Dana; Richard C. Honey
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Paper Abstract

A backscatter sensor has been developed for rapidly measuring, in situ, the volume scattering function (VSF) in the backward direction. The backscatter sensor uses a bistatic optical geometry to measure backscatter from a small volume of seawater over a range of scattering angles from approximately 115 degree(s) to 170 degree(s). The calibration of the sensor yields a weighted, angular averaged value of the VSF with a centroid located at a scattering angle of about 150 degree(s). The backscatter sensor design is based on a sensitive synchronous detector and pulsed, light-emitting diode that has been used at visible and near-infrared wavelengths. The entire sensor package, which includes circuitry for digitizing the signal, is contained in a compact, rugged housing. The sensor has been deployed both in towed arrays and in stationary profiling mode. Scattering profiles from two recent deployments are presented.

Paper Details

Date Published: 1 December 1991
PDF: 12 pages
Proc. SPIE 1537, Underwater Imaging, Photography, and Visibility, (1 December 1991); doi: 10.1117/12.48882
Show Author Affiliations
Robert A. Maffione, SRI International (United States)
David R. Dana, SRI International (United States)
Richard C. Honey, SRI International (United States)

Published in SPIE Proceedings Vol. 1537:
Underwater Imaging, Photography, and Visibility
Richard W. Spinrad, Editor(s)

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