Generally, the demands of maintaining a spatially coherent beam at optical frequencies is difficult over long range thereby limiting the usefulness of the technique for image formation in turbid media. This paper describes a variation of the spatial interferometric technique that relies upon projected spatial gratings with subsequent detection against a quasi-coherent return signal.
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This manuscript is available at http://ieeexplore.ieee.org/ and may be cited as: Caimi, F. M., Bailey, B., & Blatt, J. (1998). Spatially variant and coherent illumination method for undersea object detection and recognition. Oceans '98: Conference proceedings: 28 September-1 October, 1998, Nice, France, Acropolis Convention Center. (Vol. 3, pp. 1259-1263). Piscataway, NJ: Oceans '98 IEEE/OES Conference Organizing Committee. doi:10.1109/OCEANS.1998.726270
Florida Atlantic University. Harbor Branch Oceanographic Institute contribution #1247.