Fig. 5: Camouflage in SWIR band with sunshine.
From: Whole-infrared-band camouflage with dual-band radiative heat dissipation
a The spectral illuminance of solar radiation and black bodies at various temperatures in the IR bands. b A typical scenario for IR camouflage with sunshine. In the specular reflection direction of sunlight (1), strongly reflected light and thermal emission can be captured by thermal imagers. However, in other directions (2) only weak diffused light and thermal emission can be captured. c Thermal images captured in the SWIR band in directions 1 and 2 at 100 °C and 300 °C, respectively
