Effects of lighting parameters on contrast threshold in the mesopic and photopic luminance ranges

The first objective of this thesis was to find out how the background luminance level, spectra of the background and stimulus, and eccentricity of the stimulus affect contrast thresholds in the mesopic luminance range. The background luminance levels used were between LB=0.01...20 cd/m 2. They cover the typical luminance levels of road lighting. The spectra of the background and stimulus were broadband white, blue, green, and red. The measurements were made at eccentricities of 0 and 10°. The results of this thesis confirmed that when the photopic background luminance leve