Optical measurements of ripples using a scanning-laser slope gauge: Part II--data analysis and interpretation from a laboratory wave tank

Erik John Bock; Tetsu Hara

doi:10.1117/12.138855

22 December 1992 Optical measurements of ripples using a scanning-laser slope gauge: Part II--data analysis and interpretation from a laboratory wave tank

Erik John Bock, Tetsu Hara

Author Affiliations +

Proceedings Volume 1749, Optics of the Air-Sea Interface: Theory and Measurement; (1992) https://doi.org/10.1117/12.138855
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

A description of a new scanning laser slope gauge is given and the preliminary results obtained from laboratory wave tank measurements are presented. The device relies on the measurements of two components of surface slope to compute spatial and temporal lags used to estimate the full three-dimensional spectrum. The device is capable of resolving frequencies in the range between zero and 63 Hertz, and wavelengths in the range between 0.63 and 20 centimeters. The technique makes use of a two-dimensional laser scanner which samples the perimeter of a 10 centimeter square (an unfilled aperture.) The laboratory results show mechanically generated waves propagating on both distilled water and a one micro-molar solution of Triton-X100^R in distilled water. Results indicate the device is well suited to measure the full three dimensional spectra of capillary-gravity waves and is capable of providing ground-truth measurements for the verification of remotely sensed ocean surface features.

Citation Download Citation

Erik John Bock and Tetsu Hara "Optical measurements of ripples using a scanning-laser slope gauge: Part II--data analysis and interpretation from a laboratory wave tank", Proc. SPIE 1749, Optics of the Air-Sea Interface: Theory and Measurement, (22 December 1992); https://doi.org/10.1117/12.138855

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