Research on portable underwater laser range gated imaging system

Dongdong Jin; Chonglei Pei; Chunheng Ji; Lei Sun; Hongbo An; Enyue Duan

doi:10.1117/12.2666744

4 April 2023 Research on portable underwater laser range gated imaging system

Dongdong Jin, Chonglei Pei, Chunheng Ji, Lei Sun, Hongbo An, Enyue Duan

Proceedings Volume 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications; 126176T (2023) https://doi.org/10.1117/12.2666744
Event: 9th Symposium on Novel Photoelectronic Detection Technology and Applications (NDTA 2022), 2022, Hefei, China

Abstract

A portable underwater laser range gated imaging system is realized. The laser uses a fixed electro-optic Q-switched 532nm laser with a pulse width of 2.5 ns and a repetition rate of 20k. The detector adopts domestic second-generation image intensifier coupled with commercial CMOS photosensitive chip, with a limit resolution of 55lp/mm and a maximum gain of 10,000 times. Use FPGA delay chain timing technology to achieve 0.625ns time control accuracy and achieve distance-gated imaging. The overall system weight is less than 15kg, and it is close to zero gravity underwater. The system was measured in a large domestic pool, and the underwater detection imaging distance can reach 5-67AL, and the three-dimensional imaging accuracy is better than 1cm.

Citation Download Citation

Dongdong Jin, Chonglei Pei, Chunheng Ji, Lei Sun, Hongbo An, and Enyue Duan "Research on portable underwater laser range gated imaging system", Proc. SPIE 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications, 126176T (4 April 2023); https://doi.org/10.1117/12.2666744

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