The conventional measurements to describe the photometric quality of headlamps usually only comprise the luminous flux and the illuminance (resp. the luminous intensity) in several measuring points given by Type Approval Legislation. Practically, these photometric measurements do not describe the visual impression of a headlamp light distribution sufficiently, neither in lab nor in real street geometry.With the clear outer lens headlamps introduced recently, filament images are projected directly onto the screens or streets, thus giving new impulses to research. Starting from the established photometric practice, other types of measurements and physiological fundamentals will be discussed. The basic tools to make physical measurement and physiological impression comparable, e.g. in terms of homogeneity, are shown.


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    Title :

    Luminance Measurement, Contrast Sensitivity, Homogeneity: New Approaches of Defining the Quality of Headlamps


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1998



    Publication date :

    1998-02-23




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Luminance Measurement, Contrast Sensitivity, Homogeneity: New Approaches of Defining the Quality of Headlamps

    Hamm, M. / Lampen, M. / Society of Automotive Engineers | British Library Conference Proceedings | 1998



    Luminance contrast measurement

    Nielsen,O. / Brueel u.Kjaer,DK | Automotive engineering | 1980