Critical analysis of uniform integrating sphere light source designs
DOI:
https://doi.org/10.31649/1681-7893-2025-51-1-259-269Keywords:
integrating sphere, diffuse light source, structural classification, spectrally controlled sourcesAbstract
This paper presents a critical analysis and classification of modern integrating sphere based diffuse light sources used for calibration and validation of digital video systems and optoelectronic instruments. Although these systems share a common physical principle multiple diffuse scattering and spatial averaging of radiation, their structural architectures and functional capabilities differ significantly. Emphasis is placed on light injection methods, aperture configuration, internal optical cleanliness, and the use of auxiliary or cascaded integrating spheres to extend the dynamic range. Special attention is given to spectrally and luminance-controlled systems based on multichannel LED modules. The aim of this work is to systematize integrating sphere designs and evaluate their suitability for specific metrological tasks with respect to luminance uniformity, spectral stability, and measurement repeatability.
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