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Human visual perception in terms of spectral properties of light is influenced by three basic components, which are the light source and its spectral distribution of the radiant power, observed object and its spectral properties of surfaces and human eye and its spectral sensitivity. The resultant visual perception is influenced by the interaction of these three components. In the case of street lighting,...
In general spectroradiometric measurements are very important part of characterisation of photometric or colorimetric parameters of luminaires. Street luminaires are installed in the outdoor conditions and can be operated under various electrical conditions depending on quality of the electric power. Electrical parameters may not always be ideal. Some disturbances in the electricity grid can occur...
The spectral radiance factor and thereby the appearance of fluorescing material is known to depend strongly on the spectral power distribution (SPD) of the illumination in the fluorophore's excitation wavelength band. The present work demonstrates the impact of the SPD in the fluorescence emission band on the total radiance factor. The total radiance factor of a fluorescing paper is measured in three...
Illumination plays a critical role in an underground miner's safety because miners depend most heavily on visual cues to recognize hazards. Mobile mining machinery, located in the miner's peripheral field of view ( plusmn10deg to about plusmn60deg off-axis), may pose potential pinning and striking hazards. The main objective of this research was to determine if there were peripheral visual performance...
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