STUDY OF THE SURFACE EMISSIVITY OF TEXTILE FABRICS AND MATERIALS IN THE 1 TO 15MU RANGE
Abstract
Laboratory measurements of the total and spectral infrared radiation emitted by textile materials, as applicable to the outer layer of a uniform, were made with an interferometer spectrometer. The effects of changes in the environmental parameters of the fabric, such as background temperature, fabric temperature, and humidity, were studied. For this report twelve different fabrics with a diversity of weaves and surface roughnesses were studied. The fifty-five spectra of these fabrics, which are published in this report, cover a wide range of fabric temperature, background temperature, and humidity. It was found that the weave of the fabric acts as many small blackbody radiators and tends to mask any spectral detail that may be present. Further masking of detail is done by reflected background radiation. It was found that a fluctuation in background temperature, fabric temperature, or humidity caused a change in the spectral characteristics of the fabric. Spectra of terrain features are presented and are compared to the spectra of the fabrics. It is shown that there is a spectral similarity between the fabric and terrain features because both are subject to spectral masking by background and sample characteristics. In the field, there is inter-reflection between the terrain features and the sample, sky radiance, atmospheric absorption, and reflection from background objects of the fabric, giving a spectrum that is not representative of the sample.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1967
- Accession Number
- AD0665647
Entities
People
- Isaiah Coleman
- Mark T. Mason