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A Method of Minimizing the Principal Methodical Error in Measurements of the Spectral Coefficients of Diffuse and Mixed Reflection |
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| Authors: | A V Kulikova L A Nazarenko V I Polevoi |
| Institution: | (1) Kharkov State Scientific–Research Institute of Metrology, 42 Mironositskaya Str., Kharkov, 61002, Ukraine |
| Abstract: | We consider the modifications of the measurement technique and construction of the diffuse integrating sphere that make it possible, by replacing a nontransparent screen with an iris diaphragm, to provide additional irradiation of a photoreceiver by radiation reflected from a specimen and thus to minimize, in a wide spectral range, the methodical error caused by radiation losses on the technical holes of the sphere in measuring the spectral coefficients of diffuse and mixed reflections. |
| Keywords: | spectral reflectivity diffuse integrating sphere scattering indicatrix methodical error illumination intensity transmission coefficient of a diaphragm radiation detector spectral range |
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