An experimental system using pulsed laser developed for detecting underwater objects

Jionghui Rao; Kecheng Yang; Gang Lu; Xiaohui Zhang

doi:10.1117/12.725228

11 January 2007 An experimental system using pulsed laser developed for detecting underwater objects

Jionghui Rao, Kecheng Yang, Gang Lu, Xiaohui Zhang

Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 62791T (2007) https://doi.org/10.1117/12.725228
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China

Abstract

The influence of water backscattering on detecting ability should be considered emphatically when optical methods were used to detect underwater object. The water backscattering light can be decreased by using a short pulsed laser in the system and the precise distance of the detected object can be obtained easily. An experimental system made up of short pulsed laser, received optical system, narrowband light filter, high speed detector, high speed data acquisition and process system and so on was established. To validate its detection ability, this system was set into a large water pond to detect several kinds of objects with different reflection index. We processed mass of experimental data get from above experiment with simple method, and the processing result proved that this system had the ability of detecting objects whose distance is about sixty meters. Because of its precise ranging ability, this system can be used with the combination of a right scan device in three dimensional underwater imaging system.

Citation Download Citation

Jionghui Rao, Kecheng Yang, Gang Lu, and Xiaohui Zhang "An experimental system using pulsed laser developed for detecting underwater objects", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62791T (11 January 2007); https://doi.org/10.1117/12.725228

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KEYWORDS

Light scattering

Pulsed laser operation

Laser scattering

Optical filters

Signal detection

Water

Scattering

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