Beer-Lambert-Law Parametric Model of Reflectance Spectra for Dyed Fabrics.

摘要

This study examines a parametric model of diffuse reflectance for the purpose of simulating the spectral response of near-infrared (NIR, 0.7-0.9 micro-m) and shortwave infrared (SWIR, 0.9-1.7 micro-m) absorbing dyes for military applications. This analysis establishes the ground-work for the 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 combat Area of Responsibility (AOR). The dyes considered for prototype analysis are triarylamine, tetraaryldiamine, transition metal dithiolene, and indolium iodide. Military camouflage fabric consisting of 50/50 nylon/cotton blend (NYCO) in a ripstop weave printed with four-color digital pattern was used as the test substrate for NIR dye application. The results of this study provide validation of the constructed 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.