[3] B KANG，B YONG， K PARK. Performance evaluations of LED headlamps[C]// SPIE, 2010, 11(5): 737-742.

[4] M SIVAK，B SCHOETTLE, MJ FLANNAGAN. LED headlamps: glare，colour rendering[C]//SPIE， 2004，36(4): 295-305.

[7] MA Chi-tang, CHOU Kao-hsu, CHEN Yi-yung， et al. Design and optimization of automotive headlamps based on projection system with double ellipsoidal reflector[C]. SPIE ，2010， 7717: 77170M-1.

[9] H RIES. Tailored freeform optical surfaces[J]. Opt. Soc. Am. A ，2002，19:590-595.

[10] P Benítez，J C Miňano， J Blen, et al，Simultaneous multiple surface optical design method in three dimensions[J].Opt. Eng，2004，43，1489-1502.

[11] T Heβling, U Geyer, A Hellwig, et al. Free-form glass reectors for non-trivial illumination applications with extended sources[C]//SPIE，2012， 8485: 84850G-1.

[14] CHEN Fei,WANG Kai,QIN Zong, et al. Design method of high-efficient LED headlamps lens[J]. Opt.Express，2010，18: 20926-20938.

[16] SUN Li-wei，JIN Shang-zhong，CEN Song-yuan. Free-form microlens for illumination applications[J]. Applied Optics，2009, 48(29): 5520-5527.

[17] A Domhardta, U Rohlfingb, S Weingaertnera. New design tools for LED headlamps[C]//SPIE，2008，7003: 70032C.

[21] Aleksandra Cvetkovic, Oliver Dross, Julio Chaves，et al. Etendue-preserving mixing and projection optics for high-luminance LEDs, applied to automotive headlamps[J]. Opt.Express ，2006，14: 13014-13020.

[22] Hung CC, Fang YC, Huang MS, et al. Optical design of automotive headlight system incorporating digital micromirror device[J]. Applied Optics，2010, 49(22): 4182-4187.