SWIR's advantage over the visible in long-range imaging scenarios: comparative field trials in a variety of atmospheric conditions

G. Jobert; N. Vannier; S. Pelletier; R. Delubac; X. Brenière; N. Péré-Laperne; L. Rubaldo

doi:10.1117/12.3014161

7 June 2024 SWIR's advantage over the visible in long-range imaging scenarios: comparative field trials in a variety of atmospheric conditions

G. Jobert, N. Vannier, S. Pelletier, R. Delubac, X. Brenière, N. Péré-Laperne, L. Rubaldo

Author Affiliations +

Proceedings Volume 13046, Infrared Technology and Applications L; 1304609 (2024) https://doi.org/10.1117/12.3014161
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

A number of studies suggest that the Short Wave InfraRed (SWIR) band (0.9-1.7μm), offers a significant advantage over the visible for long-range daytime scenarios. This advantage of SWIR is due in particular to its excellent optical penetration in the presence of aerosols thanks to reduced light-scattering effects, allowing good scene contrast to be maintained over very long distances. This study reports the results of a field evaluation campaign, involving Lynred’s SNAKE TECLESS (TL) sensor (640x512@15μm, InGaAs) along size narrow field optics. This year-long campaign features a variety of atmospheric conditions, weathers and aerosol types. Those targets are at distances ranging between 10km and 84km. Finally, we compare the image obtained with SWIR sensors having a pixel pitch of 15μm and 10μm, with the same objective lenses, in order to conclude on the interest of reducing the pixel pitch for a gain in range.

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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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G. Jobert, N. Vannier, S. Pelletier, R. Delubac, X. Brenière, N. Péré-Laperne, and L. Rubaldo "SWIR's advantage over the visible in long-range imaging scenarios: comparative field trials in a variety of atmospheric conditions", Proc. SPIE 13046, Infrared Technology and Applications L, 1304609 (7 June 2024); https://doi.org/10.1117/12.3014161

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