Chang Yung-Peng, Chang Jin-Kai, Chen Hsin-An, Chang Shih-Hsin, Liu Chun-Nien, Han Pin, Cheng Wood-Hi
Opt Express. 2019 Feb 4;27(3):1808-1815. doi: 10.1364/OE.27.001808.
An advanced laser headlight module (LHM) employing highly reliable glass phosphor is demonstrated. The novel glass-based YAG phosphor-converter layers fabricated by low-temperature of 750°C exhibited better thermal stability. The LHM consisted of a 5 × 1 blue laser diode array, an aspherical lens, a glass phosphor-converter layer with an aluminum thermal dissipation substrate, and a dichroic filter to allow pass blue light and reflect yellow phosphor light. The 5 × 1 blue laser array was packaged with five blue lasers having optical power of 1.2 W per laser. The LHM exhibited total output optical power of 6 W, luminous flux of 1860 lm, relative color temperature of 4100 K, and efficiency of more than 310 lm/W. The high-beam patterns of the LHMs were measured to be 45,000 luminous intensity (cd) at 0°, 31,000 cd at ± 2.5°, and 12,500 cd at ± 5°, which were well satisfied the ECE R112 class B regulation. The proposed high-performance LHM with highly reliable glass-based phosphor-converter layer fabricated by low temperature is favorable as one of the promising LHM candidates for use in the next-generation automobile headlight applications.
展示了一种采用高度可靠玻璃荧光粉的先进激光前照灯模块（LHM）。通过750°C的低温制造的新型玻璃基YAG荧光粉转换层表现出更好的热稳定性。该LHM由一个5×1的蓝色激光二极管阵列、一个非球面透镜、一个带有铝散热基板的玻璃荧光粉转换层以及一个用于透射蓝光和反射黄色荧光粉光的二向色滤光片组成。5×1的蓝色激光阵列由五个每个激光光学功率为1.2W的蓝色激光器封装而成。该LHM的总输出光功率为6W，光通量为1860lm，相对色温为4100K，效率超过310lm/W。测量得到LHM的远光模式在0°时为45000坎德拉（cd），在±2.5°时为31000cd，在±5°时为12500cd，完全满足ECE R112 B类法规。所提出的具有通过低温制造的高度可靠玻璃基荧光粉转换层的高性能LHM，作为下一代汽车前照灯应用中有前景的LHM候选之一是有利的。
