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Proceedings Paper

New constructions of instruments using optical fibers for measurement of lighting parameters
Author(s): Jan Dorosz; Wladyslaw Dybczynski; Maciej B. Rafalowski
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Paper Abstract

In this work authors present: fiber optic head for half-cylindrical illuminance measurement, fiber optic scanner for measurement of luminance distribution in the space and three sections fiber optic head for luminance measurer giving possibilities to calculate luminance distribution in each section of vision field. All constructions based on fibers produced by authors. Apart from the measurement of illuminance on the plane surface it is also necessary to measure half-cylindrical illuminance (according to the rules and other recommendations). The luminous flux incident on the photometer's head has to be corrected (according to the definition of the luminous flux). It is possible to do this spatial correction using light fibers having very small numerical aperture (NA). Authors present this kind of construction. In many cases we have to measure the luminance function in the space. This function we can find in the conventional way - making a lot of measurements in different directions. For the purpose of automatization of that process, authors offer new construction of fiber optic photometry head for luminance measurement, based on light fiber element which is turning around in half-space and cooperating wiht the CCD element. All data from detector are analyzed by computer. The brightness distribution in vision process is very important. The object being in the center of attention, laying in the middle of field vision should be the most bright. The nearest surroundings of that object should possess lower brightness and the background least of all (average value). According to recommendations the luminance quotients of following areas: background to the nearest surroundings and to the visual field should be 1:3:10. The new method of measurement of brightness distribution using optical fibers is presented.

Paper Details

Date Published: 24 October 2003
PDF: 10 pages
Proc. SPIE 5125, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments, (24 October 2003); doi: 10.1117/12.532352
Show Author Affiliations
Jan Dorosz, Bialystok Univ. of Technology (Poland)
Wladyslaw Dybczynski, Bialystok Univ. of Technology (Poland)
Maciej B. Rafalowski, Bialystok Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 5125:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments
Ryszard S. Romaniuk; Krzysztof T. Pozniak, Editor(s)

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