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Experimental study on underwater range-gated imaging system pulse and gate control coordination strategy
Liu, Wei1; Li, Qi1; Hao, Ge-Yang1; Wu, Guo-Jun1,2; Lv, Pei1
2018
Conference NameInternational Symposium on Optoelectronic Technology and Application 2018: Ocean Optics and Information Technology, OTA 2018
Source PublicationOcean Optics and Information Technology
Volume10850
Conference Date2018-05-22
Conference PlaceBeijing, China
PublisherSPIE
Contribution Rank1
AbstractThe water has a strong absorption and scattering of light radiation, resulting in a certain depth of the underwater world in the dark. Therefore, underwater optical detection technology based on active lighting has become the main mode of deep-sea photo detection. Using a 532nm narrow-pulse laser and a self-built gain CCD system to form a underwater laser rang-gated imaging system, the forward and backward scattering are modeled and analyzed. Underwater laser rang-gated imaging system, was studied by laser pulse jitter, thus lead to the door of the control signal, the open time (earlier/later), the relationship between secondary scattering and image contrast curve, puts forward an optimal pulse with door control strategy. The correctness of the model is verified by the method of simulation and calculation of the relative ratio of the images acquired by the actual underwater laser distance gating imaging system. The results show that when the imaging system is not saturated, the image quality is best when the gate and the laser pulse are optimally matched. The effects of early opening and delayed opening on the image quality are different, and the duration of the gate opening is equal to the laser pulse width. At that time, the image quality is not optimal, and the effects of laser pulse jitter and secondary scattering are not all unfavorable. Based on the model, the opening time and the gate opening time are determined according to the contrast curve. It is generally advantageous to open the door lagging behind, and the duration of the gate opening should be 1- 3 times the laser pulse width. © 2018 SPIE.
Department先进光学仪器研究室
DOI10.1117/12.2505587
Indexed ByEI
ISBN9781510623422
Language英语
ISSN0277786X;1996769X
EI Accession Number20185206315940
Citation statistics
Document Type会议论文
Identifierhttp://ir.opt.ac.cn/handle/181661/31127
Collection先进光学仪器研究室
Affiliation1.Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China;
2.Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266237, China
Recommended Citation
GB/T 7714
Liu, Wei,Li, Qi,Hao, Ge-Yang,et al. Experimental study on underwater range-gated imaging system pulse and gate control coordination strategy[C]:SPIE,2018.
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