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Proceedings Paper

Influence of underwater 3D imaging precision by water light scattering
Author(s): Wei Zhang; Kecheng Yang; Min Xia; Wei Li; Jiajie Tan
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Paper Abstract

In three-dimensional (3-D) imaging measurement, the center location extraction of laser bar is one of the critical techniques in determining the metrical precision of the system. The width and brightness of laser bar varying with the change of detection distance is an important factor which influences on the center location determination of laser bar. The underwater 3-D imaging quality is directly affected by light scattering effect of water. Under coordinate conditions, the width increase and brightness decrease of laser bar brings great impact on the metrical precision of the system. In this paper, the beam spread characteristics of underwater laser transferring procedure is studied and the relationship among the beam spread characteristics of underwater laser transferring, laser beam characteristics and correlative parameters of water is constituted. Finally, based on the existing relationship between beam width and beam characteristics in 3-D imaging measurement, the factors which affect the precision of underwater 3-D measurement are obtained by computing beam spread function of underwater laser transferring under diverse conditions. Calculation result shows that the metrical precision enhances for the improvement of water clarity as well as the reduction of detection distance.

Paper Details

Date Published: 29 October 2009
PDF: 8 pages
Proc. SPIE 7514, Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors, 75140N (29 October 2009); doi: 10.1117/12.846508
Show Author Affiliations
Wei Zhang, Huazhong Univ. of Science and Technology (China)
Kecheng Yang, Huazhong Univ. of Science and Technology (China)
Min Xia, Huazhong Univ. of Science and Technology (China)
Wei Li, Huazhong Univ. of Science and Technology (China)
Jiajie Tan, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7514:
Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors
Dieter Stefan Jäger; Hequan Wu; Shuisheng Jian; Desheng Jiang; Deming Liu; Weiwei Dong; Qizhen Sun; Xiaochun Xiao, Editor(s)

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