抄録
A pseudo blackbody surface with an area of 20mm × 20mm was designed and fabricated for estimation of radiation transfer through a finite cross sectional area. It was confirmed that the surface was nearly equal to the perfect diffuse surface (Lambert’s surface) through experiments on directional emission of radiation. In this case, it was revealed that since a finite small area which emits radiation entering into a solid angle for detection was increased with emission angle by an inverse cosine function when the solid angle was fixed, the directional emission didn’t change with respect to emission angle. In addition, the pseudo blackbody surface could be transferred from a position at an open exit of the blackbody furnace to a forwarded position using a wave guide with a high reflectance ( > 0.98) mirror and a high aspect ratio between the length and width (width / length > 0.4).
