EVALUATION OF PAINT SUITABILITY PROVIDED FOR PAINTING THE INSIDE OF ULBRICHT’S SPHERE
Journal Title: Proceedings of Electrotechnical Institute Prace Instytutu Elektrotechniki - Year 2012, Vol 59, Issue 256
Abstract
In photometry, in order to measure luminous stream, photometric integrators are used. They are usually spherical in shape and their interior is covered with white paint. The paint must meet requirements of norms and standards. This paper deals with general requirements which must be met in case of covering the inside of photometric integrators. The requirements are related to the theory of luminous stream measurement in a photometric integrator. This paper additionally presents results of research in terms of one sample which was covered with white paint and its suitability for covering the inside of Ulbricht’s sphere. Total reflection coefficient as well as luminous propagation of reflected light and spectral distribution curve have been measured. The degree of integrator’s colorimetric distortion after recovery of its inside has been checked.
Authors and Affiliations
Przemysław TABAKA
Keywords
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