Proposed digital holographic 3D mapping of coral beds

R. L. Kendrick; Ray Bell; Taylor Grow; Thomas Höft; J. C. Marron; Nathan Seldomridge; Eric Smith

doi:10.1117/12.804749

19 December 2008 Proposed digital holographic 3D mapping of coral beds

R. L. Kendrick, Ray Bell, Taylor Grow, Thomas Höft, J. C. Marron, Nathan Seldomridge, Eric Smith

Proceedings Volume 7150, Remote Sensing of Inland, Coastal, and Oceanic Waters; 71500H (2008) https://doi.org/10.1117/12.804749
Event: SPIE Asia-Pacific Remote Sensing, 2008, Noumea, New Caledonia

Abstract

Digital Holography is a technique which provides a measurement of the complex field reflecting from a coherently illuminated object. When the measurement is performed with two carefully chosen wavelengths a phase difference map can be created providing a three dimensional map of the object. We present results from a laboratory experiment where the surface contours of coral are measured in seawater. Contour maps with step sizes on the order of 0.1 mm can easily be obtained. We propose that this technique be used to remotely monitor the growth of coral in an effort to quantify the health of coral beds. The technique is effective from space, aircraft, ships, buoys or rigid platforms such as a pier. In the last few years we have been successfully using this technique to measure objects through very turbulent atmosphere at ranges of up to 700 meters and we are now applying the concept to shoreline applications.

Citation Download Citation

R. L. Kendrick, Ray Bell, Taylor Grow, Thomas Höft, J. C. Marron, Nathan Seldomridge, and Eric Smith "Proposed digital holographic 3D mapping of coral beds", Proc. SPIE 7150, Remote Sensing of Inland, Coastal, and Oceanic Waters, 71500H (19 December 2008); https://doi.org/10.1117/12.804749

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