[1] 杨通, 段璎哲, 程德文, 等. 自由曲面成像光学系统设计: 理论、发展与应用[J]. 光学学报, 2021, 41(1): 0108001. doi:  10.3788/AOS202141.0108001

Yang Tong, Duan Yingzhe, Cheng Dewen, et al. Freeform imaging optical system design: Theories, development and application [J]. Acta Optica Sinica, 2021, 41(1): 0108001. (in Chinese) doi:  10.3788/AOS202141.0108001
[2] Wu R, Feng Z, Zheng Z, et al. Design of freeform illumination optics [J]. Laser & Photonics Reviews, 2018, 12(7): 1700310.
[3] 许宁晏, 陈露, 黄静, 等. 自由曲面成像光学系统的初始结构设计方法[J]. 红外与激光工程, 2022, 51(2): 20210852. doi:  10.3788/IRLA20210852

Xu Ningyan, Chen Lu, Huang Jing, et al. Review of design methodology for starting-point of freeform surface imaging optical system [J]. Infrared and Laser Engineering, 2022, 51(2): 20210852. (in Chinese) doi:  10.3788/IRLA20210852
[4] Wills S. Freeform optics: notes from the revolution [J]. Optics and Photonics News, 2017, 28(7): 34-41. doi:  10.1364/OPN.28.7.000034
[5] 孟庆宇, 汪洪源, 王严, 等. 大线视场自由曲面离轴三反光学系统设计[J]. 红外与激光工程. 2016, 45(10): 1018002. doi:  10.3788/IRLA20164510.1018002

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) doi:  10.3788/IRLA20164510.1018002
[6] Wu W, Jin G, Zhu J. Optical design of the freeform reflective imaging system with wide rectangular FOV and low F-number [J]. Results in Physics, 2019, 15: 102688. doi:  10.1016/j.rinp.2019.102688
[7] Xie Y, Mao X, Li J, et al. Optical design and fabrication of an all-aluminum unobscured two-mirror freeform imaging telescope [J]. Applied Optics, 2020, 59(3): 833-840. doi:  10.1364/AO.379324
[8] 陈炳旭, 廖志远, 操超, 等. 大视场大相对孔径自由曲面成像系统设计[J]. 红外与激光工程, 2020, 49(8): 20200005. doi:  10.3788/IRLA20200005

Chen Bingxu, Liao Zhiyuan, Cao Chao, et al. Design of the freeform imaging system with large field of view and large relative aperture [J]. Infrared and Laser Engineering, 2020, 49(8): 20200005. (in Chinese) doi:  10.3788/IRLA20200005
[9] Cheng D, Wang Q, Liu Y, et al. Design and manufacture AR head-mounted displays: A review and outlook [J]. Light: Advanced Manufacturing, 2021, 2(3): 350-369.
[10] Wei S, Fan Z, Zhu Z, et al. Design of a head-up display based on freeform reflective systems for automotive applications [J]. Applied Optics, 2019, 58(7): 1675-1681. doi:  10.1364/AO.58.001675
[11] Zhuang Z, Parent J, Roulet P, et al. Freeform wide-angle camera lens enabling mitigable distortion [J]. Applied Optics, 2022, 61(18): 5449-5456. doi:  10.1364/AO.456127
[12] Reimers J, Bauer A, Thompson K P, et al. Freeform spectrometer enabling increased compactness [J]. Light: Science & Applications, 2017, 6: e17026.
[13] Liu Yuxuan, Bauer A, Viard T, et al. Freeform hyperspectral imager design in a CubeSat format [J]. Optics Express, 2021, 29(22): 35915-35928. doi:  10.1364/OE.439530
[14] 毛姗姗, 李艳秋, 刘克, 等. 高数值孔径自由曲面极紫外光刻物镜光学设计[J]. 红外与激光工程, 2019, 48(8): 814002. doi:  10.3788/IRLA201948.0814002

Mao Shanshan, Li Yanqiu, Liu Ke, et al. Optical design of high numerical aperture extreme ultraviolet lithography objective with freeform surfaces [J]. Infrared and Laser Engineering, 2019, 48(8): 0814002. (in Chinese) doi:  10.3788/IRLA201948.0814002
[15] Takaki N, Papa J C, Bauer A, et al. Off-axis conics as base surfaces for freeform optics enable null testability [J]. Optics Express, 2020, 28(8): 10859-10872. doi:  10.1364/OE.389426
[16] Takaki N, Bauer A, Rolland J P. On-the-fly surface manufacturability constraints for freeform optical design enabled by orthogonal polynomials [J]. Optics Express, 2019, 27(5): 6129-6146.
[17] Takaki N, Bayer A, Rolland J P. Degeneracy in freeform surfaces described with orthogonal polynomials [J]. Applied Optics, 2018, 57(35): 10348-10354. doi:  10.1364/AO.57.010348
[18] 叶井飞. 光学自由曲面的表征方法与技术研究[D]. 南京理工大学, 2018.

Ye Jingfei. Research on the method technique for characterizing freeform optical surfaces[D]. Nanjing: Nanjing University of Science & Technology, 2018. (in Chinese)