Automotive lighting devices with reflective surfaces require high reflectivity for light collection and optimum photometric efficiency. The reflective surface is commonly aluminum applied by physical vapor deposition (PVD), i.e. an evaporative process or sputtering. The design and process of some reflective surfaces are such that certain areas of the target do not receive sufficient aluminum coating thickness. Reduced coating thickness results in decreased optical efficiency, and has led to increased thermal demands on the thermoplastic substrate. This paper seeks to quantify how reflectivity and substrate temperature are dependent on the thickness of the PVD metal coating, and thermal simulation tools are used to predict lamp temperatures for varying coating thickness of the reflective surface.


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    Title :

    Influence of Aluminum Coating Thickness on Automotive Lamps


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE World Congress & Exhibition ; 2008



    Publication date :

    2008-04-14




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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