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A parametric model of NIR and SWIR reflectance spectra for dyed fabrics

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  • Scott Ramsey
  • Troy Mayo
  • Samuel G. Lambrakos

Abstract

This study describes a parametric model of diffuse reflectance for the purpose of simulating the spectral response of near-infrared (NIR, 0.7–0.9 μm) and shortwave infrared (SWIR, 0.9–1.7 μm) absorbing dyes for minimizing NIR-SWIR reflectance of dyed fabrics. This model is purely phenomenological, but is optimal with respect to numbers of parameters. This model establishes ground-work for development of a prediction tool, which when given the constituent materials available, will enable rapid optimization of NIR/SWIR band contrast matching of composite systems, (e.g. uniforms and ancillary gear) for a given specification of NIR-SWIR reflectance. This model adopts absorption coefficients for NIR/SWIR absorbing dyes whose absorption spectra span the NIR/SWIR spectral range. Military camouflage fabric consisting of 50/50 nylon/cotton blend in a ripstop weave printed with four-color digital pattern was used as the test substrate for NIR/SWIR dye application. The results of this study provide validation of the parametric model within reasonable error, for practical applications including simulating NIR/SWIR spectral responses corresponding to fixed dye and dye blend concentrations in prototype camouflage fabrics.

Suggested Citation

  • Scott Ramsey & Troy Mayo & Samuel G. Lambrakos, 2017. "A parametric model of NIR and SWIR reflectance spectra for dyed fabrics," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 31(15), pages 1508-1519, October.
    • Handle: RePEc:taf:tewaxx:v:31:y:2017:i:15:p:1508-1519
    DOI: 10.1080/09205071.2017.1352541
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