ABB Bomem has recently designed a field-deployable reflectometer. The Full Spectrum Reflectometer
(FSR) measures the diffuse reflectance of surfaces in the 0.7 μm to 13.5 μm spectral range. The spectral
resolution is adjustable from 32 to 4 cm-1. The instrument is portable, battery-operated and designed for
field usage in a single, lightweight and ruggedized package. In its simplest mode, the instrument is
automated and can be operated by non-specialist personnel with minimal training.
The FSR has a laboratory mode to measure targets brought to the instrument in a sampling cup and a field
mode with automated measurement sequence. To facilitate the measurement of various ground surfaces, the
instrument is packaged in a three-point mount for easy target access and stability. One of the mount is the
sampling port. The instrument has its own built-in NIR and LWIR infrared sources to illuminate the ground
area to be measured. The instrument includes two built-in references for calibration: a Spectralon diffuser
and an Infragold diffuser.
The first units were commissioned to build a spectral database of surfaces in various conditions (humidity,
temperature, texture, mixing, etc.) and in the presence of interfering chemicals (oils, solvents, etc.) but the
instrument can also serve other purposes such as the identification of unknown materials.