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Proceedings Paper

An In-Water Contrast Measuring Device
Author(s): R. B. Patterson; F. W. Heemstra
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Paper Abstract

The depth at which a Secchi disc disappears provides a measure of visible range which is not applicable to many practical situations. Most other methods of determining in-water visibility measure one or more water parameters, which are used in a theoretical or empirical model to predict visible range. The proposed Contrast Meter measures the apparent contrast of a known target at a fixed distance and relates the loss of contrast to visible range by empirical measurements. This instrument lends itself to remote sensing and could be adapted for measuring contrast loss in other turbid mediums. A prototype instrument has been built and tested.

Paper Details

Date Published: 10 November 1975
PDF: 11 pages
Proc. SPIE 0064, Ocean Optics IV, (10 November 1975);
Show Author Affiliations
R. B. Patterson, Naval Research Laboratory (United States)
F. W. Heemstra, Naval Research Laboratory (United States)

Published in SPIE Proceedings Vol. 0064:
Ocean Optics IV

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