Projection systems with a cut-off line for automotive applications

G. Kloos; K. Eichhorn

doi:10.1117/12.616639

23 August 2005 Projection systems with a cut-off line for automotive applications

G. Kloos, K. Eichhorn

Proceedings Volume 5942, Nonimaging Optics and Efficient Illumination Systems II; 59420B (2005) https://doi.org/10.1117/12.616639
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The lighting systems of a car provide a variety of challenges from the point of view of illumination science and technology. Engineering work in this field has to deal both with reflector and lens design as well as with opto-mechanical design and sensor technology. It has direct implications on traffic safety and the efficiency in which energy is used. Therefore, these systems are continuously improved and optimized. In this context, adaptive systems that we investigate for automotive applications gain increasing importance. The properties of the light distribution in the vicinity of the cut-off line are of key importance for the safe and efficient operation of automotive headlamps. An alternative approach is proposed to refine the description of these properties in an attempt to make it more quantitative. This description is intended to facilitate intercomparison between different systems and/or to study environmental influences on the cut-off line of a system under investigation. Designing projection systems it is necessary to take a delicate trade-off between efficiency, light-distribution characteristics, mechanical boundary conditions, and legal requirements into account. Considerations and results on optical properties of three-axial reflectors in dependence of layout parameters will be given. They can serve as a guideline for the optical workshop and for free-form optimization.

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G. Kloos and K. Eichhorn "Projection systems with a cut-off line for automotive applications", Proc. SPIE 5942, Nonimaging Optics and Efficient Illumination Systems II, 59420B (23 August 2005); https://doi.org/10.1117/12.616639

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KEYWORDS

Reflectors

Projection systems

Headlamps

Light sources

Optical spheres

Mirrors

Anisotropy

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