Underwater long-distance imaging method based on combination of short coherent illumination and polarization

被引：0

作者：

Zhang R.-L. ^{[1
,2
]}

Shao J. ^{[1
,2
,3
]}

Nie Z.-W. ^{[4
]}

Lü Z.-W. ^{[5
]}

Wang Y. ^{[6
]}

Sun S.-F. ^{[1
,2
]}

机构：

[1] Shandong Collaborative Innovation Center of Laser Green Intelligent Manufacturing and Devices, Qingdao University of Technology, Qingdao

[2] Key Lab of Industrial Fluid Energy Conservation and Pollution Control, Qingdao

[3] Photon Factory, Physics Department, University of Auckland, Auckland

[4] Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun

[5] Unit 91550 of PLA, Dalian

[6] Qingdao Hailaser Technology Co., Ltd, Qingdao

来源：

Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2020年 / 28卷 / 07期

关键词：

Long-range imaging; Polarization imaging; Separation of backscattering; Short coherence; Underwater optical imaging;

D O I：

10.37188/OPE.20202807.1485

中图分类号：

学科分类号：

摘要：

Considering the development of transparent ocean strategy, low-cost staring imaging equipment have unique advantages in underwater optical imaging. However, it is difficult to separate the backscattering and imaging target, as well as to capture a clear image at a long distance. More importantly, before acquiring the effective target image, the strong scattering noise saturates the image and prevents subsequent processing. Thus, we propose a novel imaging method that combines short coherent illumination and polarization imaging. The short coherent illumination simplifies the separation of the backscattering and imaging target while the polarization technology prevents image saturation in advance and ensures the effective acquisition of the target image. In addition, we built a large-scale underwater optical imaging platform and conducted imaging tests at a long-distance of 22 m. The experimental results showed that the signal-to-noise ratio increased from 0.50 dB to 13.57 dB, and the anti-image early saturation ability of the device increased 1.42 times. These results are superior to the traditional polarization imaging. The proposed composite imaging method can provide technical support for large-range underwater optical monitoring. © 2020, Science Press. All right reserved.

引用

页码：1485 / 1493

页数：8

共 19 条

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