The design and calibration of a new hyperspectral Compact Laboratory Spectro-Goniometer (CLabSpeG) is presented. CLabSpeG effectively measures the bidirectionalreflectance Factor (BRF) of a sample, using a halogen light source and an AnalyticalSpectral Devices (ASD) spectroradiometer. The apparatus collects 4356 reflectance datareadings covering the… (More)
Figure 4. Bidirectional Reflectance Factors of the Spectralon for 3 different settings: 1) CLabSpeG Spectralon panel with θr = 0° at 650 nm; 2) EGO Spectralon panel at 650 nm measured by  with θr = 0°; and 3) average of 11 Spectralon panels at 655 nm measured by  with θr = 0°. The differences among the three polynomial equations presenting the Bidirectional Reflectance Factors are smaller than the standard deviation (0.0040 at 15° and 0.0076 at 75°) found by  among the 11 Spectralon panels.