Development of an underwater laser imaging system for micro-bubbles

Yunying Wang; Shuai Lv; Hailu Wang; Guijuan Li; Yuanyuan Guo

doi:10.1117/12.2199722

8 October 2015 Development of an underwater laser imaging system for micro-bubbles

Yunying Wang, Shuai Lv, Hailu Wang, Guijuan Li, Yuanyuan Guo

Author Affiliations +

Proceedings Volume 9677, AOPC 2015: Optical Test, Measurement, and Equipment; 96771N (2015) https://doi.org/10.1117/12.2199722
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

Bubbles in the sea are important to the research of geography, chemical engineering, biology etc. This paper presented an underwater laser imaging system for micro-bubbles, including the design, construction and performance. The system using a series 532-nm laser for lighting, and transform a piece-source. The piece-source illumination and image an area of bubbles by a high resolution CCD. It is impossible to achievement imaging the bubbles with diameters from 10µm to 500µm at the same time, we use three different focus apertures to adapt the requirements of resolution and receiver field of view. We can change the adaptive aperture for bubbles with different diameters. The imaging capability of the system is tested in the laboratory. The solid targets of specified size have been imaged in the sink, and obtained the clear images of the target with 500µm and 10µm for three magnifications. In order to verify the reliability of the system, experiments were carried out in the marine to obtain the bubble distribution in the offshore area. The results of bubbles distribution characteristics showed that the distribution is basically according with index law.

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Yunying Wang, Shuai Lv, Hailu Wang, Guijuan Li, and Yuanyuan Guo "Development of an underwater laser imaging system for micro-bubbles", Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 96771N (8 October 2015); https://doi.org/10.1117/12.2199722

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