Laser surface fluorosensor for monitoring phytoplankton

Details Laser surface fluorosensor for monitoring phytoplankton Laser surface fluorosensor for monitoring phytoplankton

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.2980..182c&link_type=abstract

Proc. SPIE Vol. 2980, p. 182-186, Advances in Fluorescence Sensing Technology III, Richard B. Thompson; Ed.

Physics

Scientific paper

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.

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