Target discrimination in the extended SWIR (eSWIR) band (2-2.5µm) compared to Vis, NIR, and SWIR in degraded visual environments

Lindsey Wiley; Joshua Follansbee; Patrick Leslie; Orges Furxhi; Rich Pimpinella; David Brady; Ronald Driggers

doi:10.1117/12.2618566

27 May 2022 Target discrimination in the extended SWIR (eSWIR) band (2-2.5μm) compared to Vis, NIR, and SWIR in degraded visual environments

Lindsey Wiley, Joshua Follansbee, Patrick Leslie, Orges Furxhi, Rich Pimpinella, David Brady, Ronald Driggers

Author Affiliations +

Proceedings Volume 12106, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXIII; 1210606 (2022) https://doi.org/10.1117/12.2618566
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

Long-range target identification is well studied in the Visible (Vis) and near-infrared (NIR) bands, and more recently in the shortwave infrared (SWIR). The longer wavelength of SWIR (1-1.7μm) improves target detection for both long ranges and under challenging atmospheric conditions because it is less limited by scattering and absorption in the atmosphere. For these reasons, SWIR sensors are proliferating on military platforms. The extended shortwave infrared (eSWIR) band spanning from 2 to 2.5μm is not typically limited by diffraction, and, as a result, the band benefits target acquisition both at long ranges and for degraded visual environments. Theoretical and experimental data compare eSWIR to Vis, NIR, and SWIR for atmospheric transmission, reflectivity, illumination, and sensor resolution and sensitivity. The experimental setup includes two testbeds, each with four cameras. The first is a wide field of view (FOV) testbed matching FOV at 20 degrees for each camera. The second is a narrow FOV telescope testbed to match instantaneous FOV (IFOV) for consistent resolution across all four bands at long ranges. Both the theory and experiment demonstrate advantages of using eSWIR for long-range target identification under degraded visual environments.

Conference Presentation

Citation Download Citation

Lindsey Wiley, Joshua Follansbee, Patrick Leslie, Orges Furxhi, Rich Pimpinella, David Brady, and Ronald Driggers "Target discrimination in the extended SWIR (eSWIR) band (2-2.5μm) compared to Vis, NIR, and SWIR in degraded visual environments", Proc. SPIE 12106, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXIII, 1210606 (27 May 2022); https://doi.org/10.1117/12.2618566

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available