A new device intended to measure internal wave phenomena, benthic transport phenomena and propulsion system hydrodynamics is introduced. This device, in measuring vorticity, is able to investigate small scale fluid behavior, a behavior that is difficult to capture by the turbulence measuring techniques presently employed. The vorticity meter approach introduced utilizes Laser Doppler Velocimeter techniques. This approach has the promise of providing rotational sensitivities of from 10-3 to 10-4 radians sec-1 at scale sizes ranging from 1 mm. to 10 m. An additional benefit of the technique is that it provides a remote sensing capability with a 10 to 20 meter standoff range under favorable water conditions. A proposed two-dimensional display of the output of this instrument should greatly enhance the recognition of the hydrodynamic phenomena taking place.
"Laser Scanning Vorticity Meter: A New Instrument For Use In The Study Of Ocean Hydrodynamics", Proc. SPIE 0208, Ocean Optics VI, (26 March 1980); doi: 10.1117/12.958278; https://doi.org/10.1117/12.958278