设计和开发无斑点高功率激光驱动荧光粉转换紧凑型汽车前大灯模块

IF 4.6 Q1 OPTICS Journal of Physics-Photonics Pub Date : 2024-03-14 DOI:10.1088/2515-7647/ad2bd2
Virendra Kumar, Parag Sharma, Dalip Singh Mehta
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引用次数: 0

摘要

与传统光源相比,激光具有高亮度、宽色域、高方向性、低能耗和长寿命等非凡特性,因此将二极管激光器应用于汽车前大灯是汽车照明行业的一项先进创新。激光具有高度相干性,因此会遇到不需要的斑点和杂散条纹问题,在高流明激光应用中始终需要高水平的光热工程和斑点减少机制。针对这些挑战,我们在本文中报告了一种基于高流明激光的汽车前大灯模块的创新设计和开发方案。该大灯原型由一组四个圆柱形扩散器组成,通过沿扩散器长度方向的散射,将高能激光辐射分布在一个基于金属镜面的金字塔型空腔反射器中。来自圆柱形扩散器的散射激光与远处的荧光粉层相互作用,从而防止荧光粉-树脂燃烧。金字塔型空腔反射器通过空间和角度的多样性,在使激光光均匀和无斑点方面发挥着重要作用,因为光经过多次内部反射后从空腔中射出。这种反射器可在不使用任何投射透镜的情况下将高度集中的白光重定向到很远的范围。前照灯系统的设计和性能使用 TracePro 仿真软件进行了研究,并在光度实验室进行了实验测试。头灯产生的光的国际照明委员会(CIE)坐标为(0.3947,0.4908),相关色温为 4240 K,代表暖白光照明。
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Design and development of speckle-free high-power laser-driven phosphor converted compact automotive headlamp module
The applicability of diode-lasers in automobile headlights is an advanced innovation for the automobile illumination industry due to the extraordinary properties of laser light over conventional light sources, such as high brightness, wide colour gamut, high directionality, low energy consumptions and long lifetime. Lasers are highly coherent in nature, so they encounter the problem of unwanted speckles and spurious fringes and always require a high level of opto-thermal engineering along with speckle reduction mechanisms for high lumen laser applications. Targeting such challenges, in this paper, we report an innovative design and development scheme for a high lumen laser-based automotive headlamp module. The headlamp prototype comprises a set of four cylindrical diffusers which distribute the high energy laser radiation via scattering along the length of the diffusers within a metallic mirro-based pyramidal cavity reflector. The scattered laser light from cylindrical diffusers interacts with a remote phosphor layer that prevents phosphor–resin burning. The pyramidal cavity reflector plays an important role in making the laser light uniform and speckle-free, via spatial and angular diversity, as light exits from the cavity after multiple internal reflections. This reflector redirects the highly concentrated white light over a long range without using any projection lens. The design and performance of the headlight system was studied using TracePro simulation software and tested experimentally in a photometric laboratory. The International Commission on Illumination (CIE) coordinates of the light generated by the headlamp was (0.3947, 0.4908) and the correlated colour temperature was 4240 K, which represents warm white light illumination.
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来源期刊
CiteScore
10.70
自引率
0.00%
发文量
27
审稿时长
12 weeks
期刊最新文献
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