Inverse spectral analysis of diffuse reflectance measured with a field spectrometer for NIR-SWIR absorbing dyes

J. Duncan; R. Viger; S. Ramsey; T. Mayo; S. G. Lambrakos

doi:10.1117/12.2659076

14 June 2023 Inverse spectral analysis of diffuse reflectance measured with a field spectrometer for NIR-SWIR absorbing dyes

J. Duncan, R. Viger, S. Ramsey, T. Mayo, S. G. Lambrakos

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Proceedings Volume 12533, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXIV; 1253310 (2023) https://doi.org/10.1117/12.2659076
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

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Abstract

This study describes a sensitivity analysis of absorption spectra for NIR-SWIR absorbing dyes relative to inverse analysis of diffuse-reflectance spectra. Absorption spectra of NIR/SWIR-absorbing dyes obtained by inverse spectral analysis provides information for estimating their dielectric response functions. Sufficient sensitivity of absorption spectra relative to inverse spectral analysis implies that estimated dielectric response functions can be used for construction of approximate effective medium models capable of estimating reflectance from dye formulations on substrates, e.g., fabrics. The specific concept of applying inverse spectral analysis to diffuse reflectance, measured with field spectrometers, for estimation of dielectric response, is considered here.

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J. Duncan, R. Viger, S. Ramsey, T. Mayo, and S. G. Lambrakos "Inverse spectral analysis of diffuse reflectance measured with a field spectrometer for NIR-SWIR absorbing dyes", Proc. SPIE 12533, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXIV, 1253310 (14 June 2023); https://doi.org/10.1117/12.2659076

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