In the field of vehicle lighting, due to the diode laser, its small size and high energy conversion efficiency, it can be effectively used as the headlight source of high beam. In recent years, it was adopted by European advanced car manufacturers as a new generation of automotive headlight lighting products. The current mature technology on the market is to extend the laser beam by means of reflection and to use a single high-power laser as the light source to meet the needs of surface lighting. In this research, we propose a new integrated optical design for an automotive headlight system with the rod lens, gradient-index lens (GRIN lens) and freeform lens to expand the laser beam. With regard to the diffusion of the beam by reflection and refraction, the liquid lens is used as a switch for the high beam and low beam lights to meet the needs of vehicle lighting functions and to use low-power diode lasers to synthesize the array light source. Compared with the 24-W LED headlight module available in the current market, the energy saved by this proposed optical design can increase efficiency by an average of 33%. The maximum illuminance is 56.6 lux in the high-beam mode, which is 18% higher than the standard value. Let the laser light meet the lighting requirements of regulatory standard values even beyond.

中文翻译：

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梯度折射率透镜和液体透镜的高效激光头灯设计研究

在汽车照明领域，由于采用了二极管激光器，其体积小，能量转换效率高，因此可以有效地用作远光灯的头灯光源。近年来，它已被欧洲高级汽车制造商所采用，作为新一代的汽车前照灯照明产品。市场上当前的成熟技术是通过反射来扩展激光束，并使用单个高功率激光作为光源来满足表面照明的需求。在这项研究中，我们为汽车前照灯系统提出了一种新的集成光学设计，该光学设计采用了棒状透镜，梯度折射率透镜（GRIN透镜）和自由形式透镜以扩展激光束。关于光束通过反射和折射的扩散，液体透镜用作远光灯和近光灯的开关，以满足汽车照明功能的需求，并使用低功率二极管激光器合成阵列光源。与当前市场上提供的24 W LED大灯模块相比，这种提议的光学设计节省的能量平均可提高效率33％。在远光灯模式下，最大照度为56.6 lux，比标准值高18％。让激光满足法规标准值甚至更高的照明要求。在远光模式下，最大照度为56.6 lux，比标准值高18％。让激光满足法规标准值甚至更高的照明要求。在远光灯模式下，最大照度为56.6 lux，比标准值高18％。让激光满足法规标准值甚至更高的照明要求。