Moored optical particle flux instrument

Enson Chang; Randall J. Patton; Robert L. Gran

doi:10.1117/12.190053

26 October 1994 Moored optical particle flux instrument

Enson Chang, Randall J. Patton, Robert L. Gran

Proceedings Volume 2258, Ocean Optics XII; (1994) https://doi.org/10.1117/12.190053
Event: Ocean Optics XII, 1994, Bergen, Norway

Abstract

A prototype instrument has been developed to measure the settling velocity of marine particulates using optical techniques in an in-situ settling chamber. Particles from 100 micrometers to several mm are imaged by a shadowgraph system, which has a 30 cm depth of field. Particles in the 10 to 100 micrometers range are monitored by a laser diffraction system. Flow management considerations have been incorporated into the instrument to ensure minimal disruption of the aggregates and their settling rates. We present the results of laboratory tests in which the settling rates of polystyrene spheres and natural marine particulates have been measured using the component systems. Design considerations for the self-contained moored version are also specified.

Citation Download Citation

Enson Chang, Randall J. Patton, and Robert L. Gran "Moored optical particle flux instrument", Proc. SPIE 2258, Ocean Optics XII, (26 October 1994); https://doi.org/10.1117/12.190053

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