| 摘要 |
PURPOSE:To obtain the practical black-body furnace by using a material having large emissivity for a part which exerts large influence upon emission from the small hole of the black-body furnace. CONSTITUTION:The influence of the temperature at the part of an internal wall 1a upon the emission from the small hole 1c of the black-body furnace 1 is larger than the temperature at the part of an internal wall 1b. For the purpose, the material which has as large emissivity as possible is used for the internal wall 1a and temperature control is performed precisely through a thermocouple. Then, the internal wall 1b which does not exert large influence upon the emission from the small hole 1c is brought under temperature control not so precisely. Thus, the practical blackbody furnace 1 which has no defect logically is obtained. |
