The 3-D scanning laser installed on an underwater vehicle achieves observation of seafloor

Yoshida, Hiroshi; Ishibashi, Shojiro; Saitoh, Takashi; Ochimizu, Hideaki

doi:10.1190/segj112013-092

Cited by 5 publications

(1 citation statement)

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“…1,2 Currently, the most widely used technology for exploration is sound navigation and ranging (SONAR), because acoustic waves can propagate through a long distance in water. However, SONAR suffers from unwanted multipass echoes that are due to reflections from the surrounding terrain.…”

Section: Introductionmentioning

confidence: 99%

Underwater three-dimensional imaging laser sensor with 120-deg wide-scanning angle using the combination of a dome lens and coaxial optics

et al. 2016

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, "Underwater three-dimensional imaging laser sensor with 120-deg wide-scanning angle using the combination of a dome lens and coaxial optics," Opt. Eng. Abstract. We developed an underwater three-dimensional (3-D) imaging sensor using a 532-nm laser. The sensor system combines a dome lens with coaxial optics to realize a wide-scanning angle of 120 deg ðhorizontalÞ × 30 deg ðverticalÞ while having a compact size of 25-cm diameter and 60-cm length. A detector sensitivity time control circuit and a time-to-digital converter are used to detect a small signal and suppress the unwanted backscattered signals due to marine snow. 3-D imaging of the seafloor with 20-m width and 60-m length was demonstrated in the sea around Ishigaki Island, Japan.

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Section: Introductionmentioning

confidence: 99%