Investigation of thermal infrared emissivity spectra of mineral and rock samples

摘要

The results of initial laboratory investigation of spectral hemispherical emissivity of several rocks (granite, sandstone, marble, gabbro, anorthosite, etc.) are reported. A radiometric instrumentation was constructed and utilized to measure the hemispherical radiation reflected by the observed object being irradiated by a parallel infrared beam. Measurements were performed with resolution of about 0.2 μm in thermal infrared (TIR) range (8-12 μm).