The cut-off line and the illumination of the right-hand edge of the road are produced by the horizontally arranged reflector segments ( Figure C).ĭ: Example of light distribution on the cover lens of an FF headlamp ( Figure D).Į: The light distribution at road level can be adapted to special requests and requirements ( Figure E).Īlmost all modern reflection headlamp systems for low beam are equipped with FF reflective surfaces. This enables clear, non-patterned cover lenses to be used as well, which give the headlamp a brilliant appearance. In the example shown, the reflector is divided into segments which illuminate different areas of the road and surroundings.Ī: Thanks to the special design almost all reflective surfaces can be used for the low beam ( Figure A).ī: Areas are aligned in such a way that the light from all segments of the reflectors is reflected downwards onto the road surface ( Figure B).Ĭ: The deflection of the light beams and light scatter is made possible directly by the reflective surfaces. They can only be calculated and optimised with the aid of computers. This is carried out by two different shapes of optical elements: Cylindrical vertical profiles for the distribution of the light in the horizontal direction and prismatic structures on a level with the optical axis which serve to distribute the light in such a way that there is more light in the most important spots in the traffic space ( Figure C).ĭ: The cover lens of a paraboloid headlamp for low beam has clear optical elements and provides the typical light distribution ( Figure D).Į: Typical low beam distribution of a paraboloid headlamp as an Isolux road diagram ( Figure E).įF headlamps have reflective surfaces which are freely formed within the space. They appear occasionally in high-beam headlamps and large H4 headlamps.Ī: If you look into the reflector from the front, the upper part of the reflector is used for the low beam ( Figure A).ī: The light source is positioned in such a way that the light radiated upwards onto the reflector surface is then reflected downwards over the optical axis onto the road ( Figure B).Ĭ: Optical elements in the cover lens distribute the light in such a way that the legal requirements are met. Paraboloid reflectors are hardly used today, though. This is the oldest technology used for headlamp light distribution. The reflective surface has a paraboloid surface. Home / Car parts / Sonne repainting systems.Exhaust gas aftertreatment design diagnostics.Checking the exhaust gas temperature sensor.Home / Technical / Sensors and actuators.Media pump - design, function and troubleshooting.Electronic boost pressure control- turbocharger actuator testing.Ultrasound-based parking aid - park distance control (PDC).ABS/ESP control units for braking and driving dynamics.Programming car keys and changing batteries.Home / Technical / Car electronics and electrics.Thermal management in electric and hybrid vehicles.Car refrigerant & oil filling quantities.Home / Technical / Car air conditioning.Electronic control units in contemporary vehicles with LED headlamps.Basic principles of car lighting technology.
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