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

Publication ,  Conference
Wiley, L; Follansbee, J; Leslie, P; Furxhi, O; Pimpinella, R; Brady, D; Driggers, R
Published in: Proceedings of SPIE - The International Society for Optical Engineering
January 1, 2022

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.

Duke Scholars

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

EISSN

1996-756X

ISSN

0277-786X

ISBN

9781510650886

Publication Date

January 1, 2022

Volume

12106

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering
 

Citation

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Wiley, L., Follansbee, J., Leslie, P., Furxhi, O., Pimpinella, R., Brady, D., & Driggers, R. (2022). Target discrimination in the extended SWIR (eSWIR) band (2-2.5μm) compared to Vis, NIR, and SWIR in degraded visual environments. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 12106). https://doi.org/10.1117/12.2618566
Wiley, L., J. Follansbee, P. Leslie, O. Furxhi, R. Pimpinella, D. Brady, and R. Driggers. “Target discrimination in the extended SWIR (eSWIR) band (2-2.5μm) compared to Vis, NIR, and SWIR in degraded visual environments.” In Proceedings of SPIE - The International Society for Optical Engineering, Vol. 12106, 2022. https://doi.org/10.1117/12.2618566.
Wiley L, Follansbee J, Leslie P, Furxhi O, Pimpinella R, Brady D, et al. Target discrimination in the extended SWIR (eSWIR) band (2-2.5μm) compared to Vis, NIR, and SWIR in degraded visual environments. In: Proceedings of SPIE - The International Society for Optical Engineering. 2022.
Wiley, L., et al. “Target discrimination in the extended SWIR (eSWIR) band (2-2.5μm) compared to Vis, NIR, and SWIR in degraded visual environments.” Proceedings of SPIE - The International Society for Optical Engineering, vol. 12106, 2022. Scopus, doi:10.1117/12.2618566.
Wiley L, Follansbee J, Leslie P, Furxhi O, Pimpinella R, Brady D, Driggers R. Target discrimination in the extended SWIR (eSWIR) band (2-2.5μm) compared to Vis, NIR, and SWIR in degraded visual environments. Proceedings of SPIE - The International Society for Optical Engineering. 2022.

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

EISSN

1996-756X

ISSN

0277-786X

ISBN

9781510650886

Publication Date

January 1, 2022

Volume

12106

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering