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Proceedings Paper

Ocean-Optical Measurements Using Acousto-Optic Filtering
Author(s): Frank M. Caimi
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Paper Abstract

Spectral radiometric, scattering, and absorption measurements have classically been accomplished using grating spectrometers or fixed passband optical filters. Recently, holographic optical elements and linear-geometry detectors have gained popularity in spectrometric instrumentation, thereby eliminating the need for movable mechanical components. Other mechanically-fixed methods of spectral filtering rely upon electro- or acousto-optic interaction in solids or liquids. A system useful for ocean-optical measurements is described which employs an acousto-optic filter under microcomputer control to achieve wavelength tunability from 400-700 nm. This approach allows construction of low-power instrumentation having rapid and programmable control. In addition, output beam collimation is maintained to facilitate measurement over long optical paths. The physical principle of operation is described, various trade-offs discussed, and results presented for seawater containing phytoplankton.

Paper Details

Date Published: 7 August 1986
PDF: 5 pages
Proc. SPIE 0637, Ocean Optics VIII, (7 August 1986); doi: 10.1117/12.964231
Show Author Affiliations
Frank M. Caimi, Harbor Branch Foundation, Inc. (United States)

Published in SPIE Proceedings Vol. 0637:
Ocean Optics VIII
Marvin A. Blizard, Editor(s)

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