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Journal Article

Thermoplastic Reflector Design for Robust Optical Performance

2012-04-16
2012-01-0266
A headlamp reflector has many performance requirements. Principal among these is the need to deliver a compliant beam pattern while withstanding a severe heat environment. In serving this requirement, the reflector must reliably secure the light source (bulb filament) relative to the optical prescription (facets) of the reflector. Traditionally, achieving this performance requirement has been challenging since the reflector elements which are designed to deliver stable and reliable optical performance, are the same elements which must also withstand thermal stresses and adjustment-related static stresses within the reflector. The integrity of these optical elements may also be limited by surface sink, especially in the bulb fastening and attachment locations. The current work describes the design of a reflector bracket through which these forces can be minimized and accommodated while delivering robust optical performance.
Technical Paper

Pedestrian Safe and Impact Resistant Headlamp Design Through a Novel Energy Absorber Ring Concept

2010-04-12
2010-01-0293
As the pedestrian impact regulations are continuing to evolve, there is a growing emphasis on each and every component of a vehicle front to be pedestrian friendly. Traditionally pedestrian safety during an automotive impact is ensured through bumper, grill, fender and hood. However, the headlamp design was not under the same level of consideration as compared to other frontal components. To make pedestrian safety complete, the headlamp also needs to adhere to the pedestrian safety regulations. A novel energy absorber ring (EAR) concept was developed to make the headlamps pedestrian friendly. The proposed EAR concept was found to improve the pedestrian safety and low speed vehicle damageability performance. It was also observed that the proposed concept reduces the replacement and insurance cost.
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