| 摘要 |
PURPOSE: To reduce the errors by correcting a radiation thermometer and an optical measuring instrument by using a specific formula comprising the product of an exponential function and a polynomial of the reciprocal of the temperature. CONSTITUTION: According to the reference wavelength method, the correction value R(T) is expressed by Eq. I for a black body light source, where L(λr .T) represents the spectral radiation amount emitted from a black body furnace at temp. T with the reference wavelengthλr , S(λ) the spectral sensitivity of the radiation thermometer, and V(T) the signal of radiation thermometer at temp. T. Equation III is derived by expressing the correction value R(T) in the form of a quadratic polynomial of the reciprocal of the temperature, turning a, b, c into a composite factor, applying Planck's radiation law to L (λ.T), introducing the number K defined by Eq. II, and substituting to K0 at a specific temp. T0 to give R(T)=1, where C1 and C2 are the first and the second radiation constants. The factors a, b, c in Eq. III can be determined from values corrected at three points or more, and the temp. of the radiation thermometer can be calculated by the repetition method. By this interpolating formula, the temp. error can be minimized over a wide temperature range and with effective wavelength.
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