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Freeform Optics for LED Automotive Headlamps

Kai Wang, Sheng Liu, Xiaobing Luo, Dan Wu

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Abstract

In this chapter, first the optical regulations of low-beam and high-beam headlamps are introduced. Then the specific requirements of LED packaging modules for headlamp applications are introduced, and related practical ASLP is designed in detail. Based on basic information on LED headlamps, different kinds of optical design methods based on freeform optics are introduced, including Fresnel-freeform lenses, a freeform optics integrated poly-ellipsoid system (PES), freeform reflectors, and low-beam–high-beam integrated double-beam freeform optics. A practical freeform optics design case of each design method is described in detail, and experimental analyses of some design cases are also included.

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What this paper is about

In this chapter, first the optical regulations of low-beam and high-beam headlamps are introduced. Then the specific requirements of LED packaging modules for headlamp applications are introduced, and related practical ASLP is designed in detail. Based on basic information on LED headlamps, different kinds of optical design methods based on freeform optics are introduced, including Fresnel-freeform lenses, a freeform optics integrated poly-ellipsoid system (PES), freeform reflectors, and low-beam–high-beam integrated double-beam freeform optics. A practical freeform optics design case of each design method is described in detail, and experimental analyses of some design cases are also included.

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Available abstract

In this chapter, first the optical regulations of low-beam and high-beam headlamps are introduced. Then the specific requirements of LED packaging modules for headlamp applications are introduced, and related practical ASLP is designed in detail. Based on basic information on LED headlamps, different kinds of optical design methods based on freeform optics are introduced, including Fresnel-freeform lenses, a freeform optics integrated poly-ellipsoid system (PES), freeform reflectors, and low-beam–high-beam integrated double-beam freeform optics. A practical freeform optics design case of each design method is described in detail, and experimental analyses of some design cases are also included.

Key concepts: Headlamp, Optics, Beam (structure), Nonimaging optics, Computer science, Engineering, Engineering drawing, Materials science

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