Inherent in the design of a low-beam (passing-beam) headlamp pattern is a trade-off between providing sufficient lighting for the driver using the headlamp and protecting oncoming drivers from glare. To solve this problem, a multi-reflector (MR) headlamp is presented which has a dual focal length parabolic cylinder construction to utilize fully the light emission of the light source. Also, some segments of the MR have a tilted parabolic cylindrical shape, so a sharp diagonal cut-off line can be realized.
MaoW.ZhangJ.Data structure and search method in CAD of automobile headlamp lens arrays (in Chinese). Automot. Engng, 1994, 16(6), 361–364.
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FujitaT.IchiharaT.OyamaH.Development of MR (multi reflector) headlamp (headlamp with slant angle of 60 degree, contributable to future vehicle body styling). SAE technical paper 870064, 1987.
