The LED Street Lighting Applied to Mesopic Vision(<Special Issue>Efficient and Safe Lighting Based on the Spectral Sensitivity of Human Vision at Mesopic Light Levels)
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چکیده
منابع مشابه
Modeling spectral sensitivity at low light levels based on mesopic visual performance
The spectral sensitivity of the eye at low light levels, ie, mesopic conditions, is determined by the rod and cone photoreceptors of the retina operating together in varying degree as adaptation luminance shifts between the scotopic and photopic. Thus mesopic spectral sensitivity is different from photopic, where only cones contribute to vision. There are definite needs for a practical system o...
متن کاملCharacterising mesopic spectral sensitivity from reaction times
The spectral sensitivity of the eye was investigated using reaction times to broadband chromatic stimuli over a range of background luminances. Relative sensitivity was determined from the nonlinear reaction time curve by converting reaction times to a linear measure that was independent of spectral sensitivity. Two models for mesopic spectral sensitivity were compared. The first was a linear c...
متن کاملThe development of a mesopic spectral sensitivity curve based on visual observation , and the question of spectral additivity in the mesopic luminance region PhD thesis extract
The aim of the research was to establish an appropriate detection contrast metric in the mesopic luminance range which solves the problem of non-additivity by taking the influence of the chromatic channels into account. Based on several experiments at 10° and 20° eccentricity, and further theoretical modeling the CHC2 contrast metric was constructed, which takes the influence of the chromatic c...
متن کاملRod and Cone Contributions to Mesopic Vision
Mesopic light levels span approximately 3-4 log units in the natural viewing environment, including many indoor lighting settings, and most twilight or nighttime outdoor and traffic lighting environments. Traditional studies of the contribution of the different photoreceptor types to mesopic vision have been hampered by an inability to modulate the rod or cone systems independently. Our approac...
متن کاملDevelopment of Visual Performance Based Mesopic Photometry
This work started by investigating the applicability of the photopic V( ) function to predict visual task performance at mesopic light levels. Visual acuity and pedestrian visibility experiments were carried out in varied lighting and viewing conditions. The results indicated the inadequacy of photopic photometry to characterise the response of peripheral vision at low mesopic light levels. The...
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ژورنال
عنوان ژورنال: JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
سال: 2013
ISSN: 0019-2341,1349-838X,2185-1506
DOI: 10.2150/jieij.97.222