Optical design of complex curved surfaces automotive headlamp based on light barrier with extended reflectors
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摘要: 挡光板是近代投射式汽车前照灯用于调节近光灯配光性能的重要部件。采用聚焦法调整挡光板拐点的位置可以有效地抑制投射式前照灯近光照射时光型截止线上的色差和梯度问题,具有提高驾驶员视觉舒适度和行车安全指标的功能。采用一种基于有延展反射面的挡光板的多曲面LED前照灯的光学设计,使用NX10.0建立结构模型,LucidShape软件进行仿真,配光屏幕最大照度值为51.9 lx。研究基于有延展反射面的挡光板的光学设计与常规挡光板的光学设计的配光差异,以及两者在吉利汽车2017年提出的近光路照标准下两者数据对比情况。结果表明:具有延展反射面的挡光板可以有效提高配光Ⅲ区各点的基础数值,进一步提高行车时道路前方40 m~50 m处的视觉亮度,利于辨清道路前方及行人情况。
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关键词:
- 延展反射面 /
- 近光 /
- LucidShape /
- 光线分布
Abstract: The light barrier is an important part for the headlamp in the modern projected automobile to adjust the light distribution performance of headlights. The focus method to adjust the position of the light barrier can effectively suppress the chromatism and gradient on the cut-off line, which has the functions of improving driver’s visual comfort and driving safety. An optical design of complex curved surfaces LED automotive headlamp based on light barrier with extended reflectors was adopted, the NX10.0 was used to build the structure model and LucidShape software was used for simulation, the maximum illumination value is 51.9 lx. The light distribution differences of optical design on light barrier with extended reflectors and optical design on conventional light barrier, as well as the comparison of two data under the road lighting standard proposed by Geely Automobile in 2017 were studied. The results show that the light barrier with extended reflectors can effectively improve the basic numerical of each point in the third light distribution zone and the visual brightness at 40 m~50 m ahead of the road, which are beneficial to the road ahead and pedestrians.-
Keywords:
- extended reflectors /
- low beam /
- LucidShape /
- light distribution
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表 1 吉利近光灯路照标准
Table 1 Road illumination standards of low beam in Geely
等级 参数 W10(m)
@5 lxW20(m)
@5 lxW40(m)
@5 lxE1(lx)
@10 m-20 mE2(lx)
@65 m R1.51 ≥16 ≥25 ≥14 ≥180 ≥12 2 ≥14 ≥22 ≥12 ≥150 ≥9 3 ≥12 ≥18 ≥10 ≥130 ≥7 4 ≥10 ≥15 ≥8 ≥110 ≥5 5 ≥8 ≥12 ≥6 ≥90 ≥3 注:W10(m)@5 lx——车前10 m处5 lx照度宽度;E1(lx)@10 m~20 m——车前中心位置10 m~20 m之间的最大照度值;E2(lx)@65 m R1.5——车前65 m右侧1.5 m处照度值。 表 2 吉利近光灯路照测试
Table 2 Road illumination test of low beam in Geely
测试内容 W10(m)@5 lx W20(m)@5 lx W40(m)@5 lx E1(lx)@10 m~20 m E2(lx)@65 m R1.5 具有延展面的设计 14.81(2级) 21.43(3级) 14,12(1级) 157.83(2级) 10.79(2级) 不具有延展面的设计 14.32(2级) 20.17(3级) 13.87(2级) 152.11(2级) 9.94(3级) 灯具端电压 13.2 V×0.85面罩损耗 模拟参数:车宽1.345 m,车高0.726 8 m,初始下倾角1.0%。 表 3 吉利近光灯路照测试
Table 3 Road illumination test of low beam in Geely
测试内容 W10(m)@5 lx W20(m)@5 lx W40(m)@5 lx E1(lx)@10~20 m E2(lx)@65 m R1.5 模拟测试数据 14.81(2级) 21.43(3级) 14,12(1级) 157.83(2级) 10.79(2级) 样灯实测数据 14.63(2级) 20.88(3级) 13.76(2级) 154.21(2级) 10.63(2级) 灯具端电压 13.2 V×0.85面罩损耗 模拟参数:车宽1.345 m,车高0.726 8 m,初始下倾角1.0%。 -
[1] ZHENG Z R, HAO X, LIU X. Freeform surface lens for LED uniform illumination[J]. Applied Optics,2009,48(35):6627-6634. doi: 10.1364/AO.48.006627
[2] CHENG D Y. Intense pinhole light source improves image quality of reflective and transmissive display systems[C]. USA: SPIE, 1996: 63-70.
[3] YANG Bo, WANG Yongtian. Computer aided design of free form reflector[J]. Acta Optica Sinica,2004,24(6):721-724.
[4] OPIELA K S, ANDERSEN C K, SCHERTZ G. Driving after dark[J]. Public Roads,2003,66(4):22-25.
[5] WANG L. Discontinuous free-form lens design for prescribed irradiance[J]. Applied Optics,2007,47(18):3716-3723.
[6] 罗毅, 冯泽心, 韩彦军, 等. 面向半导体照明的光学[J]. 光学学报,2011,31(9):0900117-1. doi: 10.3788/AOS201131.0900117 LUO Y, FENG Z X, HAN Y J. Optics in solid state lighting[J]. Acta Optica Sinica,2011,31(9):0900117-1. doi: 10.3788/AOS201131.0900117
[7] KANG B, YONG B, PARK K. Performance evaluation of LED headlamp[J]. International Journal of Automotive Technology,2010,11(5):737-742. doi: 10.1007/s12239-010-0087-0
[8] ONG P T, GORDON J M, RABL A, et al. Tailored edge-ray designs for uniform illumination of distant targets[J]. Opt. Eng.,1995,34(6):1726-1737. doi: 10.1117/12.203116
[9] TIMINGER A, MUSCHAWECK J, RIES H. Designing tailored free-form surfaces for general illumination[C]. USA: SPIE, 2003: 128-132.
[10] DOSKOLOVICH L L, MOISEEV M A. Calculation for refracting optical elements for forming directional patterns in the form of a rectangle[J]. Opt. Technol.,2009,76(7):430-434. doi: 10.1364/JOT.76.000430
[11] ROLAND W. Nonimaging optics[M]. London: Elsevier Academic Press, 2005: 63-120.
[12] WELFORD W T, WINSTON R. Optics of nonimaging concentrators[M]. New York: Academic Press, 1978.
[13] DERICHE R, GIRAUDON G. A computational approach for cornel-and vertex detection[J]. International Joumal of Computer Vision,1993,10(2):101-124. doi: 10.1007/BF01420733
[14] WELFORD W T, Winston R. High collection non-imaging optics[M]. New York: Academic Press, 1989.
[15] Society of Automotive Engineers. S-34. SAE ground vehicle lighting standards manual[S]. USA: Society of Automotive Engineers, 2002.
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