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Proceedings Paper

Laser surface fluorosensor for monitoring phytoplankton
Author(s): Ian Campbell; Daniel McStay; Patricia M. Pollard; Michael R. Heath
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Paper Abstract

A free path surface fluorosensor laser system, capable of giving a real time indication of the presence of phytoplankton at or near the sea surface, is reported. The system utilizes an Argon ion laser operating at 488 nm, the output beam of which is amplitude modulated, expanded and directed onto the water surface. The resulting phytoplankton fluorescence is collected via a simple telescope and filter arrangement and then passed to a phase sensitive detection system. Initial tests using a single phytoplankton species (Thalassiosira pseudonana) carried out in the laboratory have shown that the system is able to detect phytoplankton (500 k cells/ml) at ranges up to 15 m.

Paper Details

Date Published: 7 May 1997
PDF: 5 pages
Proc. SPIE 2980, Advances in Fluorescence Sensing Technology III, (7 May 1997);
Show Author Affiliations
Ian Campbell, Robert Gordon Univ. (United Kingdom)
Daniel McStay, Robert Gordon Univ. (United Kingdom)
Patricia M. Pollard, Robert Gordon Univ. (United Kingdom)
Michael R. Heath, Scottish Office of Agriculture (United Kingdom)

Published in SPIE Proceedings Vol. 2980:
Advances in Fluorescence Sensing Technology III
Richard B. Thompson, Editor(s)

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