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Coherent Laser Ranging of Deforming Objects in Fires at Sub-Millimeter Precision



Matthew Hoehler, Artur A. Chernovsky, Matthew Bundy, Esther Baumann


This paper applies coherent Frequency Modulated Continuous Wave Light Detection and Ranging to capture three-dimensional measurements of objects in fire at meters of stand-off distance. Despite the presence of flame depths up to 1.5 m obscuring the target, measurements with millimeter precision are obtained. An approach to achieve sub-millimeter precision using spatial and temporal averaging during post-processing is presented. The technology is demonstrated in case studies of structural connection and vegetation response in fires.
Fire Safety Journal


laser ranging, three-dimensional image acquisition, structural response, wildfires, thermal deformation


Hoehler, M. , Chernovsky, A. , Bundy, M. and Baumann, E. (2023), Coherent Laser Ranging of Deforming Objects in Fires at Sub-Millimeter Precision, Fire Safety Journal, [online],, (Accessed May 28, 2024)


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Created July 7, 2023, Updated August 24, 2023