Apparent directional spectral emissivity determination of semitransparent materials
Niu Chun-Yang, Qi Hong†, 
, Ren Ya-Tao, Ruan Li-Ming
, Ren Ya-Tao, Ruan Li-Ming Schematic diagrams of the apparent normal emissivity measurement apparatus. (a) Radiative signal collection of the sample and (b) radiative signal collection of the blackbody.
