Detector size selection for long-range targeting performance in the extended shortwave infrared band

Lindsey Wiley; Adam Beheathland; Joshua Follansbee; Jeff Voss; Richard Pimpinella; Ron Driggers

doi:10.1117/12.3012973

7 June 2024 Detector size selection for long-range targeting performance in the extended shortwave infrared band

Lindsey Wiley, Adam Beheathland, Joshua Follansbee, Jeff Voss, Richard Pimpinella, Ron Driggers

Proceedings Volume 13045, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXV; 1304504 (2024) https://doi.org/10.1117/12.3012973
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

Interest in the eSWIR band is growing due to focal plane array technology advancements with mercury cadmium telluride and type-II superlattice materials. As design and fabrication processes improve, eSWIR detector size, weight, and power can now be optimized. For some applications, it is desirable to have a smaller detector size. Reduced solar illumination in the 2 to 2.5 μm spectral range creates a fundamental limit to passive imaging performance in the eSWIR band where the resolution benefit of small detectors cannot out-compete the reduced SNR in photon-starved environments. This research explores the underlying theory using signal-to-noise ratio radiometry and modeled target discrimination performance to assess the optimal detector size for eSWIR dependent upon illumination conditions. Finally, we model continuous-wave laser illumination in the eSWIR band to compare the effect of detector size on active and passive imaging for long-range object discrimination.

Conference Presentation

Citation Download Citation

Lindsey Wiley, Adam Beheathland, Joshua Follansbee, Jeff Voss, Richard Pimpinella, and Ron Driggers "Detector size selection for long-range targeting performance in the extended shortwave infrared band", Proc. SPIE 13045, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXV, 1304504 (7 June 2024); https://doi.org/10.1117/12.3012973

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