[1] [1] Pan Junhua. The Design, Manufacture and Test of the Aspherical Optical Surface[M]. Suzhou: Soochow University Press, 2004. (in Chinese)

[2] [2] Wang Yongtian. Design and application of free-curved surface optical system[J]. Optics & Optoelectronic Technology, 2012, 10(3): 13-16. (in Chinese)

[3] [3] Zhang Xin, Xu Yingchao. Study on free-form optical testing[J]. Chinese Journal of Optics and Applied Optics, 2008(1): 92-99. (in Chinese)

[4] [4] Shi Haodong, Zhang Xin, Wang Lingjie, et al. Aberration properties of off-axis freeform surface optical system[J]. Acta Optica Sinica, 2016, 36(7): 0708001. (in Chinese)

[5] [5] Xu Fenggang, Huang Wei, Xu Mingfei. Design of off-axis three-mirror optical system based on Wassermann-Wolf equations[J]. Acta Optica Sinica, 2016, 36(12): 1222002. (in Chinese)

[6] [6] Wang Yunqi, Liu Weiqi, Zhang Daliang, et al. Design of off-axis three-mirror optical system with wide field of view based on transfer matrix [J]. Infrared and Laser Engineering, 2016, 45(4): 0418003. (in Chinese)

[7] [7] Li Na, Huang Ying. Design of large-field and Low-distortion freeform space optical system with 3D construction method [J]. Acta Optica Sinica, 2016, 36(3): 0322001. (in Chinese)

[8] [8] Yang Tong, Zhu Jun, Jin Guofan. Design of freeform imaging systems with linear field-of-view using a construction and iteration process[J]. Optics Express, 2014, 22(3): 3362-3374.

[9] [9] Han Changyuan. Study on optical system of high resolution space camera [J]. Optics and Precision Enginerring, 2008, 16(11): 2164-2172. (in Chinese)

[10] [10] Shi Lili. The design and research on the optical system of the space remote sensor[D]. Harbin: Harbin Institute of Technology, 2007. (in Chinese)

[11] [11] Meng Qingyu, Wang Hongyuan, Wang Yan, et al. OFF-axis three-mirror freeform optical system with large linear field of view[J]. Infrared and Laser Engineering, 2016, 45(10): 1018002. (in Chinese)

[12] [12] Meng Qingyu, Wang Wei, Ma Hongcai, et al. Easy-aligned off-axis three-mirror system with wide field of view using freeform surface based on integration of primary and tertiary mirror[J]. Applied Optics, 2014, 53(14): 3028-3034.

[13] [13] Kanolt C W. Multifocal ophthalmic lenses: US, Patent 2878721[P]. 1959-03-24.

[14] [14] Zhuang Zhenfeng, Chen Yanting, Yu Feihong, et al. Field curvature correction method for ultrashort throw ratio projection optics design using an odd polynomial mirror surface[J]. Applied Optics, 2014, 53(22): 69-76.

[15] [15] Cakmakci O, Rolland J. Design and fabrication of a dual-element off-axis near-eye optical magnifier.[J]. Optics Letters, 2007, 32(11): 1363-1365.

[16] [16] Tong Jingbo, Cui Qingfeng, Xue Changxi, et al. Optical design of a off-axis dual-channel helmet mounted display[J]. Acta Optica Sinica, 2010, 30(9): 2662-2667. (in Chinese)