Compact, large aperture 2D deflection optic for LiDAR underwater applications

Jannis Gangelhoff; Christoph S. Werner; Alexander Reiterer

doi:10.1117/12.2634709

28 October 2022 Compact, large aperture 2D deflection optic for LiDAR underwater applications

Jannis Gangelhoff, Christoph S. Werner, Alexander Reiterer

Proceedings Volume 12263, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2022; 1226306 (2022) https://doi.org/10.1117/12.2634709
Event: SPIE Remote Sensing, 2022, Berlin, Germany

Abstract

An increasing number of underwater structures require regular, highly accurate inspections to maintain a safe and sustainable operation. Conventional sonar systems often lack the necessary resolution and precision, and camera-based systems are easily disturbed by turbid water. A technology which can bridge this gap is pulsed time-of-flight ranging. It provides higher resolution and precision compared to acoustic methods and tolerates turbid water. In this paper, we present a specialized underwater LiDAR (light detection and ranging) system which is capable of recording camera-like planar scenes using a two-dimensional beam-deflection unit. This is achieved using a combination of two rotating wedge-prisms mounted into custom-build motor modules which allows configurable linear, circular, and planar scan-patterns. Its compact design, paired with a large 33° deflection angle and 45 mm clear aperture makes it ideal for challenging underwater conditions.

Conference Presentation

Citation Download Citation

Jannis Gangelhoff, Christoph S. Werner, and Alexander Reiterer "Compact, large aperture 2D deflection optic for LiDAR underwater applications", Proc. SPIE 12263, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2022, 1226306 (28 October 2022); https://doi.org/10.1117/12.2634709

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