Data management software PM-HL™

data collectiontestquality

Today’s headlights include smart illumination, adaptive systems like matrix LED- or laser-based systems, and other technology that dynamically illuminates roadways while meeting the requirements of national safety regulations. Because they distribute light over a large spatial area, with specific and sometimes changing geometries, headlamps must be tested against several visual criteria to ensure proper illumination at all settings. An efficient method for evaluating headlamp performance is to project the light source onto a wall or screen and use a connected imaging colorimeter to capture the entire illumination distribution in a matter of seconds. The complete lighting assembly can then be analyzed in a single image using a number of user-defined criteria in Radiant’s PM-HL™ software module, designed specifically for headlamp evaluation. Headlight evaluation standards require that a headlamp emit light in specific ways to produce acceptable beam patterns. This evaluation is used both to ensure the effectiveness of the lamp for illuminating the roadway within nationally regulated tolerances, and the quality of the light produced according to internal standards. When the headlamp beam is projected from a known distance onto a flat surface (Lambertian wall or screen), illuminance measurements are taken at physical locations along the plane of the wall to ensure the beam pattern is projected according to standard specifications. In the past, a common method for measuring these points was to use a handheld illuminance meter to manually test each point on the wall.