Abstract
For the evaluation of headlamps in everyday traffic situations, discomfort glare is an important aspect in addition to quality of illumination. The Laboratory of Lighting Technology at the Technische Universitat Darmstadt has been doing research on discomfort glare evaluation for several decades. Now the impact of light source, headlamp optics and spectrum of adaptation field on discomfort glare in real traffic situations was tested for the first time within one test series for tungsten halogen and high intensity discharge (so-called HID or Xenon) headlamps. Moreover, the measured results are compared with calculated values, based on a spectral sensitivity function for discomfort glare.
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