[1] [1] Pan Hao, Chen Guoqing, Du Bojun. Design of double freeform surface lens for LED uniform illumination based on cubic splines［J］. Laser & Optoelectronics Progress, 2016, 53(3): 032201.

[2] [2] Wu R, Hua H. Direct design of aspherical lenses for extended non-Lambertian sources in three-dimensional rotational geometry［J］. Optics Express, 2016, 24(2): 1017-1030.

[3] [3] Cao Yanting, Chen Chao, Liang Pei, et al. Effect of different packaging of phosphor on the encapsulation efficiency of multi-chips LED［J］. Acta Photonica Sinica, 2016, 45(7): 0723003.

[4] [4] Yan Wenping, Guo Zhenning, Lin Jieben, et al. LED street lamp lens with high energy efficiency utilization based on reverse optimization design［J］. Acta Optica Sinica, 2015, 35(4): 0422008.

[5] [5] Lai Liping, Zhuang Qiren, Liu Shiwei, et al. Design of freeform lens for uniform illumination on panel of LED flat light［J］. Infrared and Laser Engineering, 2015, 44(2): 561-566.

[6] [6] Wu H, Zhang X M, Ge P. Design method of a light emitting diode front fog lamp based on a freeform reflector［J］. Optics & Laser Technology, 2015, 72: 125-133.

[7] [7] Yan Wenping, Guo Zhenning, Lin Jieben, et al. Design of double freeform-surface lens with large view angle for uniform illumination of the near-field［J］. Acta Photonica Sinica, 2015, 44(1): 0122002.

[8] [8] Xiao Xiao, Wen Shangsheng, Chen Jianlong, et al. Optical performance of secondary lightguide-diffusive component in direct LED backlight module［J］. Journal of Optoelectronics·Laser, 2013, 24(4): 679-686.

[9] [9] Chen Xinrui, Han Jinghua, Li Hongru, et al. Optimal design of LED arrays for near-field uniform illumination［J］. Journal of Applied Optics, 2014, 35(1): 122-127.

[10] [10] Hu R, Gan Z, Luo X, et al. Design of double freeform-surface lens for LED uniform illumination with minimum Fresnel losses［J］. Optik-International Journal for Light and Electron Optics, 2013, 124(19): 3895-3897.

[11] [11] Pan Shifa, Guo Zhenning, Yan Wenping, et al. Design and simulation of freeform-surface large angle lens for LED advertising light boxes［J］. Acta Photonica Sinica, 2016, 45(2): 0222002.

[12] [12] Shi Chenyang, Wen Shangsheng, Chen Yingcong.Study on curved surface LED array illumination problem based on Taguchi method［J］. Chinese Journal of Luminescence, 2015, 36(3): 348-354.

[13] [13] Wang Kai. Free-form optics study for high power LED packages and applications［D］. Wuhan: Huazhong University of Science and Technology, 2011: 22-76.

[14] [14] Whang J W, Chen Yiyung, Teng Yuanting. Designing uniform illumination systems by surface-tailored lens and configurations of LED arrays［J］. Journal of Display Technology, 2009, 5(3): 94-103.

[15] [15] GB/T 31831-2015, Technical requirements for application of LED indoor lighting［S］. Beijing: Standards Press of China, 2015.

[16] [16] Yan Wenping, Guo Zhenning, Lin Jieben, et al. Direct-down LED panel light design for uniform illumination［J］. Journal of Optoelectronics·Laser, 2014, 25(10): 1878-1885.

[17] [17] Dong Li, Liu Hua, Wang Yao, et al. Reliablity of light source modeling for distribution design on compact LED［J］. Acta Photonica Sinica, 2014, 43(2): 0222003.

[18] [18] Qian Keyuan. Near field optical modeling of LED and design optimization for direct-type backlight optical system［J］. Acta Photonica Sinica, 2015, 35(5): 0522001.

[19] [19] Wang K, Wu D, Qin Z, et al. New reversing design method for LED uniform illumination［J］. Optics Express, 2011, 19(S4): A830-A840.

[20] [20] Qin Z, Wang K, Chen F, et al. Analysis of condition for uniform lighting generated by array of light emitting diodes with large view angle［J］. Optics Express, 2010, 18(16): 17460-17476.