Two-Dimensional Temperature Distributions of the Surface of Heated Materials by Spectroscopic Measurements

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In order to investigate the characteristics of the surface of substrates without destroying and touching them, two-dimensional (2D) surface brightness distributions have been measured with a CCD camera equipped with optical filter (700-800 nm). The images measured with each wavelength gave 2D temperature distributions by two-color thermometry. In addition 2D emissivity distributions were also derived from the derived 2D temperature distribution and the measured images. We demonstrate the convenience and usefulness of this method for heated materials with different surface roughness or with and without coasting of high emissivity material. Subject headings: 2D-temperature distribution, two color method, high temperature, emissivity

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