| 摘要 |
PURPOSE:To detect a temperature even if an emissivity of an object is unknown by installing a reference radiator to an incident end of an optical fiber. CONSTITUTION:A reference radiator 3 is made to approach a temperature measuring object 10, a radiated heat energy is received by the reference radiator 3, and the reference radiator 3 which has received it radiates a heat energy of a temperature corresponding to the received energy. This energy is transmitted from an incident end 2 of an optical fiber 1 to an emitting end 4 and emitted from the emitting end 4. Subsequently, this energy is devided into an energy which is made incident on a filter 6 of a center wavelength lambda1 and an energy which is made incident on a filter 7 of a center wavelength lambda2 by a half mirror 5, and signals which have transmitted through the respective filters 6, 7 are inputted separately to optical-electric transducers 8, 9, and converted to electric signals V1, V2. Both of these signals are operated by a two color operating device, a ratio of both signals is derived, and from this ratio, a temperature of the measuring object is derived. |
