We introduce a current development in optical design for vehicle forward lighting based on solid-state lighting, in particular, phosphor-converted white LEDs. The vehicles include bicycles, bikes, and automobiles. Although the requirements regulating different vehicles are different, the low beam always requires a high-contrast cutoff line. Three optical design approaches are discussed; these include a projection lens incorporated with a baffle or beam shaper, multisegment reflectors, and complex lenses. A new design approach called light field management technology for the multisegment reflector is introduced. In addition, the possible related manufacturing errors and the robustness of different optical approaches are analyzed. Finally, we introduce three approaches to adaptive forward lighting that provide a driver with brighter and clearer vision without inducing glare to people on the roadway. The application of video projection technology to roadway illumination could be a trend of vehicle forward lighting based on solid-state lighting.

中文翻译：

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基于白光LED的车辆前照灯光学设计综述

我们介绍了基于固态照明的车辆前照灯光学设计的最新发展，特别是荧光粉转换的白光 LED。交通工具包括自行车、自行车和汽车。虽然不同车辆的调节要求不同，但近光灯总是需要高对比度的截止线。讨论了三种光学设计方法；其中包括带有挡板或光束整形器的投影透镜、多段反射器和复杂透镜。介绍了一种称为多段反射器光场管理技术的新设计方法。此外，还分析了可能的相关制造误差和不同光学方法的鲁棒性。最后，我们介绍了三种自适应前向照明方法，可为驾驶员提供更明亮、更清晰的视觉，而不会对道路上的人造成眩光。将视频投影技术应用于道路照明可能是基于固态照明的车辆前向照明的发展趋势。