SUV LED headlights use free-form optics and ceramic frame27-05-2014
CeramTec produced the ceramic frame, and Docter Optics developed the free-form lenses, for Hella LED headlights used on the Cadillac Escalade SUV .
Two suppliers recently talked about their involvement in the LED headlights that Hella KGaA Hueck & Co. is supplying for the Cadillac Escalade Platinum Sports Utility Vehicle.
The particular design of the LED headlamp is based on about 7 free-form glass projection lenses that are being used for the first time anywhere in the world, according to Hella.
All-LED SUV headlight
The projection lenses were supplied by Docter Optics, while the multi-chip LEDs are mounted on a specially developed CeramCool ceramic frame produced by CeramTec AG’s Electronics Division.
Docter Optics’ projection lenses
Docter Optics produced the complicated "free-form" lenses for the Escalades full-LED headlights. Free-form lenses make it possible, for example, to "shape" light to meet the needs of a specific applications with exceptional precision.
The assemblies in the Escalade combine not only high- and low-beam functionality, but also daytime running lights and position lights as well as the side markers that are a must in the US.
Docter Optics proprietary DOC3D process permits large-scale production of aspheres and free-form lenses for complex lighting applications, including economical production of special lenses for these LED headlights.
CeramTec’s ceramic frame
The partially transparent frame is produced using a dry pressing process and is then metallized. To meet strict customer requirements, a special process had to be developed that observed the lowest tolerances and used an absolutely perfect metallization.
Each headlight is equipped with 7 LEDs and finally fitted with the ceramic CeramCool. The LED solution is particularly strong and works reliably in temperatures ranging from -40°C to +125°C.