Coatings on automotive bulbs are becoming increasingly more important. Environmentally friendly amber and red filter layers can be used on bulbs for signaling functions. Infrared reflective layers enhance the efficiency of halogen bulbs. Styling needs can be addressed with bluish bulbs matching the color impression of Xenon headlamps or silver neutral colored amber filters for turn signal applications. The modified spectral output of coated bulbs may provide visual benefits over standard tungsten halogen lamps for example during nighttime driving. In this contribution, a survey of various coating types, the underlying physical principles responsible for their effect and the technology used to realize such coatings are presented. These include coatings designed to increase visibility while driving at night or under specific weather conditions or coatings that give bulbs a silver appearance when unlit while ensuring that intensity and color of the emitted light meets the legal requirements when the lamp is switched on. One of the future trends currently under discussion is active infrared night vision which requires a light module blocking the visible light and transmitting the near-infrared radiation. An infrared filter coating on the bulb surface which eliminates the need of an additional volume filter element will be discussed. The demands on automotive coatings differ significantly from optical coating requirement known from other applications. If the coating is properly designed, the glare values in the beam pattern are not negatively effected. A qualified coating design has to enable low glare values and high beam values at the same time. Advantages and disadvantages of different coating technologies for automotive bulbs have been presented. Accumulating the amount of light in the glare zone and combining it with the data measured with the luminance camera provides validated information about the quality of the coating. Infrared filters integrated on the bulb surface replace the need of external filter elements and reduces the size of infrared high beam modules. The amount of residual red light still has to be reduced while the amount of infrared radiation energy is already close to the theoretical limit.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Coating technology of automotive bulbs


    Weitere Titelangaben:

    Beschichtungstechnologie für Automobilglühlampen


    Beteiligte:
    Küpper, L. (Autor:in) / Knight, C. (Autor:in)


    Erscheinungsdatum :

    2004


    Format / Umfang :

    8 Seiten, 12 Bilder, 2 Tabellen, 3 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Coating Technology of Automotive Bulbs

    Kupper, L. / Knight, C. / Society of Automotive Engineers | British Library Conference Proceedings | 2004


    Coating Technology of Automotive Bulbs

    Knight, Colette / Küpper, Lukas | SAE Technical Papers | 2004


    Coating Technology of Automotive Bulbs

    Kupper, L. / Knight, C. / Society of Automotive Engineers | British Library Conference Proceedings | 2004


    Coating technology of automotive bulbs

    Kuepper,L. / Knight,C. / Philips Automotive Lighting,Aachen,DE | Kraftfahrwesen | 2004