Experimental underwater scanning imaging system using pulsed blue-green lasers

Lei Wang; Zhi-yong Xu; Qi-heng Zhang; Hua-chuang Wang; Xue-gang Yu; Rui-jie Nie

doi:10.1117/12.900130

19 August 2011 Experimental underwater scanning imaging system using pulsed blue-green lasers

Lei Wang, Zhi-yong Xu, Qi-heng Zhang, Hua-chuang Wang, Xue-gang Yu, Rui-jie Nie

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 81921K (2011) https://doi.org/10.1117/12.900130
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

A new, simple and compact experimental laser scanning imaging system is introduced for underwater imaging, and the characteristics of the system are analyzed in this paper. The system consists of the illuminator, optical scanning system, optical receiving system, narrow band filters, high-sensitivity gated image sensor, synchronous control and data acquisition system and power supply and cooling system. The illuminator is a lump-pumped, Q-switched, frequency doubled Nd:YAG pulsed laser operating at 532 nm with a frequency of 50 Hz. The receiver is a self-made gated intensified charge coupled device (ICCD). As a result, gated super Gen-II image intensifier and PAL format charge-coupled device (CCD) camera are assembled to meet the requirements. The coupling gated ICCD has a sensitivity of approximated 10^-5lx, and the minimum gate width can reach to 40 ns. And a set of scanning structure which only uses one mirror is used in the experimental system. In addition, the performance parameters are listed. Finally, the detection capabilities of the imaging system are theoretically analyzed in typical seawater. The analysis indicates that the detection depth of the system can reach to 16 m in the clear seawater.

Citation Download Citation

Lei Wang, Zhi-yong Xu, Qi-heng Zhang, Hua-chuang Wang, Xue-gang Yu, and Rui-jie Nie "Experimental underwater scanning imaging system using pulsed blue-green lasers", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81921K (19 August 2011); https://doi.org/10.1117/12.900130

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KEYWORDS

Imaging systems

Cameras

Pulsed laser operation

CCD cameras

Charge-coupled devices

Light scattering

Optical scanning systems

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