Optical design of a deep water airborne bathymetric lidar

Nathan Meraz; Grady Tuell

doi:10.1117/12.2518993

2 May 2019 Optical design of a deep water airborne bathymetric lidar

Nathan Meraz, Grady Tuell

Proceedings Volume 11005, Laser Radar Technology and Applications XXIV; 1100507 (2019) https://doi.org/10.1117/12.2518993
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

Abstract

SEAHAWK is a new lidar for deep-water bathymetric surveying. Its performance and SWaP objectives generated requirements for the optical design affecting aperture, FOV, transmission efficiency, alignment accuracy, spectral filtering, and system size. Fabrication and other hardware limitations added constraints, particularly on the apertures of the detectors, filters, and custom scanner optics. An initial thin lens analysis produced a 3-channel receiver layout leading to the fabrication of an all-aluminum 300 mm diameter F/3.6 Cassegrain telescope having a total physical length less than 200 mm. An optimization of the relay optics maximized the narrowband filter performance by keeping the incidence angle constant across the system’s 38 mrad FOV. The resulting compact optical subsystem yields a smaller lidar head than other deep-water bathymetric lidars.

Conference Presentation

Citation Download Citation

Nathan Meraz and Grady Tuell "Optical design of a deep water airborne bathymetric lidar", Proc. SPIE 11005, Laser Radar Technology and Applications XXIV, 1100507 (2 May 2019); https://doi.org/10.1117/12.2518993

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