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Proceedings Paper

Optical design of a deep water airborne bathymetric lidar
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Paper 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.

Paper Details

Date Published: 2 May 2019
PDF: 12 pages
Proc. SPIE 11005, Laser Radar Technology and Applications XXIV, 1100507 (2 May 2019); doi: 10.1117/12.2518993
Show Author Affiliations
Nathan Meraz, Georgia Tech Research Institute (United States)
Grady Tuell, 3D Ideas, LLC (United States)

Published in SPIE Proceedings Vol. 11005:
Laser Radar Technology and Applications XXIV
Monte D. Turner; Gary W. Kamerman, Editor(s)

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