赤外放射温度計校正用の面黒体

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タイトル別名
  • A Plane Blackbody for Calibrations of the Infrared Radiation Thermometer
  • セキガイ ホウシャ オンドケイ コウセイヨウ ノ メン コクタイ

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This blackbody is manufactured to be a standard radiator for calibration of the infrared radiation thermometers with a large field angle, the multi-spectral scanner for the remote sensing, etc.<br>The plane blackbody is made of an aluminium plate which has a radiating area of 200mm×400mm. The radiant face of the plate is covered tightly with quadrate pyramids of which the top angle is 60°, the length of aside line on the base is 1mm and the slopes are covered with a black oxide film, to obtain an effective emissivity greater than 0.99. The temperature of the blackbody is controlled by water at a constant temperature circulating from an outer tube and is maintained at a set temperature in the range from 0°C to 50°C.<br>The effective emissivity and the distribution of the luminance temperature have been estimated by the use of infrared radiation thermometer of which the range of the measurement wavelength is from 8μm to 14μm and the resolution of the temperature is 0.01K, to compare the manufactured plane blackbody with the standard blackbody having the accuracy of ±0.01K. On the basis of these results of measurement, the effective emissivity of the plane blackbody was estimated to be 0.992±0.001 when the surface is dry and 0.994±0.001 when wet.<br>By the use of the plane blackbody, if the luminance temperature corrected in terms of the emissivity, the infrared radiation thermometer shall be calibrated with the accuracy better than ±0.2K.

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