An In-Water Contrast Measuring Device

R. B. Patterson; F. W. Heemstra

doi:10.1117/12.954490

10 November 1975 An In-Water Contrast Measuring Device

R. B. Patterson, F. W. Heemstra

Proceedings Volume 0064, Ocean Optics IV; (1975) https://doi.org/10.1117/12.954490
Event: 19th Annual Technical Symposium, 1975, San Diego, United States

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.

Citation Download Citation

R. B. Patterson and F. W. Heemstra "An In-Water Contrast Measuring Device", Proc. SPIE 0064, Ocean Optics IV, (10 November 1975); https://doi.org/10.1117/12.954490

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