Statistical characterization of the optical interaction at a supercavitating interface

Gage Walters; Tim Kane; Rhett Jefferies; Lynn Antonelli

doi:10.1117/12.2223949

17 May 2016 Statistical characterization of the optical interaction at a supercavitating interface

Gage Walters, Tim Kane, Rhett Jefferies, Lynn Antonelli

Proceedings Volume 9827, Ocean Sensing and Monitoring VIII; 982704 (2016) https://doi.org/10.1117/12.2223949
Event: SPIE Defense + Security, 2016, Baltimore, MD, United States

Abstract

The optical characteristics of an air/water interface have been widely studied for natural interface formations. However, the creation and management of artificial cavities creates a complicated interaction of gas and liquid that makes optical sensing and communication through the interface challenging. A ventilated cavity can reduce friction in underwater vehicles, but the resulting bubble drastically impedes optical and acoustic communication propagation. The complicated interaction at the air/water boundary yields surface waves and turbulence that make modeling and compensating of the optical properties difficult. Our experimental approach uses a narrow laser beam to probe the surface of the interface and measure the beam deflection and lensing effects. Using a vehicle model with a cavitator in a water tunnel, a laser beam is propagated outward from the model through the boundary and projected onto a target grid. The beam projection is captured using a high-speed camera, allowing us to measure and analyze beam shape and deflection. This approach has enabled us to quantify the temporal and spatial periodic variations in the beam propagation through the cavity boundary and fluid.

Citation Download Citation

Gage Walters, Tim Kane, Rhett Jefferies, and Lynn Antonelli "Statistical characterization of the optical interaction at a supercavitating interface", Proc. SPIE 9827, Ocean Sensing and Monitoring VIII, 982704 (17 May 2016); https://doi.org/10.1117/12.2223949

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