| 摘要 |
PURPOSE:To enable more accurate and stable measurement of temperature, by selecting a temperature measuring wavelength not subjected to absorption by a low boiling point metal beforehand to measure the temperature by the wavelength. CONSTITUTION:A radiation light at the tip of an end-closed pipe is focused by an optical system 1 and the wavelength other than the absorption wavelengths of a low melting point metal is selected by a filter 2, then, the wavelength is transmitted through an optical fiber or the like and converted into electricity by a signal processor 4 to output a temperature. This eliminates overlapping of the absorption with a temperature measuring wavelength even in the presence of a gas of a low boiling point metal. Therefore, correct temperature measurement is possible regardless of glass for a processing capsule in the furnace.
|
