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1 October 2018 Colorimetric characterization of the tunable LED-based light source at the output of the homogenizing rod
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Proceedings Volume 10808, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2018; 1080811 (2018) https://doi.org/10.1117/12.2501631
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2018, 2018, Wilga, Poland
Abstract
The best method to obtain uniform spectral characteristic for multi-emitter sources is to use integrating sphere as mixing element. In each point of exit window of such sphere the luminance and spectral characteristic are uniform. However price of integrating spheres are disadvantageous and the output power decreases dramatically with the increase their diameters. For this reason sometimes homogenizing rods are used when LEDs are used. In the paper we present the results of colorimetric characterization of low cost homogenizing rectangular-shaped rod applied in the tunable LEDbased source for endoscopic system. For each correlated color temperature (CCT) value we investigated changes of spectral power distribution (SPD) on the output surface of the homogenizing rod and variation of CCT while increasing the distance from the output of the rod. Results of these measurements enable efficient lighting of the working area and proper placement of optical fibers used to guide light to difficult-access objects.
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Lukasz Gryko, Urszula J. Blaszczak, and Andrzej S. Zajac "Colorimetric characterization of the tunable LED-based light source at the output of the homogenizing rod", Proc. SPIE 10808, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2018, 1080811 (1 October 2018); https://doi.org/10.1117/12.2501631
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