Mr. Mateusz Feldzensztajn Profile

Mateusz Feldzensztajn

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Proceedings Article | 7 August 2017 Paper

Lamp of adjustable spectrum for photographic usage

Adam Mazikowski, Mateusz Feldzensztajn

Proceedings Volume 10445, 104450K (2017) https://doi.org/10.1117/12.2280920

KEYWORDS: Lamps, Light emitting diodes, Photography, Integrating spheres, Cameras, Light sources, Reflectivity, Light sources and illumination, Coating, Barium

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Photography is a unique rapidly growing interdisciplinary field encompassing aspects of science, art and technology. Expectations of photographers are steadily increasing with the development of technology. One of the areas playing a crucial role in photography is lighting. Consequently, several types of light sources for photographic use have been developed. The ongoing research in this field concentrates on lamps with tunable CCT (Correlated Color Temperature). In this paper, we present a lamp, which emission spectrum can be tailored without affecting the output luminous ux. Intended for photographic uses, the lamp is based on an integrating sphere and a selection of LEDs. As the LED drivers, DC-DC converters controlled by a Raspberry PI were applied. Design process, including the selection of LED wavelengths, is presented. Output characteristics of the lamp were measured using the setup containing the spectrometer. The results of these experiments show good agreement with the spectrum set on the microcomputer.

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