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 | | The optical Volume Scattering Function(VSF) is an 'inherent optical property' of water that is used by optical oceanographers to predict light propagation, image degradation, remote sensed ocean color, biological environment etc. in water. It describes the angular dependence of the fraction of incident light that scatters into different directions.
The LISST-100X measures a weighted form of the VSF. By applying a simple geometrical correction, the scattering measurements of the LISST-100 are converted to the optical VSF. The measurements cover the angular range 0.1 to 20 degrees (Type-B instrument), 0.05-10 degrees (Type-C) and 0.017 to 3.3 degrees (LISST-Floc). All measurements are made at the 670 nm wavelength of the laser. Measurements, when compared with Mie theory, have been found to agree to within a few percent. Systems for the 532nm green wavelength can be produced as custom units. Please contact us.
Click here to download paper by Agrawal (2005) on VSF measurements off New Jersey [Limnology and Oceanography, v50, n6, pp 1787-1794].
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|  | | GOT PLANKTON? |  | | LISST-100X laser particle sizer – not just for sediment or optics (c, vsf). It measures phytoplankton size distribution too! Shown is phytoplankton size distribution from LISST compared to image analysis. Courtesy of Lee Karp-Boss.
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