The optical detection in turbid water by range-gated imaging system with HPRF laser

Liang-hong Hua; Hong-wei Han; Xiao-hui Zhang

doi:10.1117/12.2196923

15 October 2015 The optical detection in turbid water by range-gated imaging system with HPRF laser

Liang-hong Hua, Hong-wei Han, Xiao-hui Zhang

Proceedings Volume 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology; 967408 (2015) https://doi.org/10.1117/12.2196923
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

In the field of underwater sensing, the rang-gated imaging based on the principle of “time slice” is an effective way to suppress backscatter and improve operating distance. In this paper, a kind of underwater range-gated imaging system which selects the LD end-pumped solid laser as the illuminator is described. Comparing to the traditional ones using the lamp-pumped Nd: YAG laser, the prime characteristics of the new designed underwater range-gated imaging system lie in the dramatic dropping of single pulse energy and the dramatic increasing of pulse repetition frequency, and the resultant change of echo receiving pattern throughout the image formation. The advantage and disadvantage of the change is first analysed in this paper, and then the underwater range-gated imaging system with high pulse repetition frequency (HPRF) laser is introduced. Finally, the experiment results in the indoor tank and the corresponding analysis is provided.

Citation Download Citation

Liang-hong Hua, Hong-wei Han, and Xiao-hui Zhang "The optical detection in turbid water by range-gated imaging system with HPRF laser", Proc. SPIE 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology, 967408 (15 October 2015); https://doi.org/10.1117/12.2196923

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KEYWORDS

Imaging systems

Pulsed laser operation

Signal to noise ratio

Image quality

Charge-coupled devices

Image filtering

Image intensifiers

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