dc.description.abstract | White LED has become one of the most popular luminaires nowadays. However, the high density of lumen output and new spectrum from LEDs not only bring human beings new visual sensations but also safety concerns. In accordance with the new trend, this research starts from the study of human vision and then the interaction with the lighting environment. The human eye model is first constructed in this thesis, where the geometric parameters and refractive indices are adopted from the biometric data. The visual acuity, chromatic dispersion, and ocular scattering behaviors of the eye model are also verified. The iris is then the next topic to analyze its contribution in ocular scattering. The spectral reflectance of iris is measured by an imaging system and a confocal system. The comparisons between the two systems as well as the calibrated spectral reflectance are obtained. Then the iris reflectance is incorporated into the eye model for straylight analysis.
After knowing well about the visual behaviors, the thesis handles the interaction between the human eye and lighting environment. In the field of outdoor lighting, the thesis first introduces the disability glare formula and the recommendation of road lighting, and then shows some studies such as visual image simulation with glare sources, the influence on visual acuity by varied CCT lighting, and the glare effect from LED-based street lamps. In the field of interior lighting, the thesis introduces the discomfort glare and develops a calculation platform. The studies here include building a transfer function between disability glare and discomfort glare, assessing the discomfort glare of fluorescent lamps and white LED tubes, and revealing their affecting levels to human circadian rhythms. Finally, according to the research outcomes, the thesis is anticipated to contribute the field of human factors lighting.
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