[2] YANG T,ZHU J,WU X,et al.Direct design of freeform surfaces and freeform imaging systems with a point-by-point three-dimensional construction-iteration method［J］.Optics Express,2015,23(8):10233-10246.

[6] JOHN R R.Origins and fundamentals of nodal aberration theory［C］//International Optical Design Conference, SPIE,2017:105900R.

[7] KEVIN P T,KYLE F,JANNICK P R.An analytic expression for the field dependence of fringe Zernike polynomial coefficients in optical systems that are rotationally nonsymmetric［C］//Proceedings of SPIE,2010:784906.

[8] JANNICK P R,KYLE F,GREGG E D,et al.Pamplemousse:the optical design,fabrication,and assembly of a three mirror freeform imaging telescope［C］//Proceedings of SPIE,2014:92930L.

[9] ZHANG X,ZHENG L,HE X,et al.Design and fabrication of imaging optical systems with freeform surfaces［C］//Proceedings of SPIE,2012:848607.