[1] J P Rolland. Wide-angle, off-axis, see-through head-mounted display [J]. Opt Eng, 2000, 39(7): 1760-1767.

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

[3] S Yamazaki, K Inoguchi, Y Saito, et al.. Thin wide-field-of-view HMD with freeform-surface prism and applications [C]. SPIE, 1999, 3639: 453-462.

[4] A Cameron. The application of holographic optical waveguide technology to the Q-SightTM family of helmet-mounted displays [C]. SPIE, 2009, 7326: 73260H.

[5] Z Zheng, X Liu, H Liu, et al.. Design and fabrication of an off-axis see-through head-mounted display with an x-y polynomial surface [J]. Appl Opt, 2010, 49(19): 3661-3668.

[6] I Kaya, K P Thompson, J P Rolland. Comparative assessment of freeform polynomials as optical surface descriptions [J]. Opt Express, 2012, 20(20): 22683-22691.

[7] K Fuerschbach, J P Rolland, K P Thompson. A new family of optical systems employing φ-polynomial surfaces [J]. Opt Express, 2011, 19(22): 21919-21928.

[8] O Cakmakci, B Moore, H Foroosh, et al.. Optimal local shape description for rotationally non-symmetric optical surface design and analysis [J]. Opt Express, 2008, 16(3): 1583-1589.

[9] O Cakmakci, S Vo, H Foroosh, et al.. Application of radial basis functions to shape description in a dual-element off-axis magnifier [J]. Opt Lett, 2008, 33(11): 1237-1239.

[10] M D Buhmann. Radial Basis Functions: Theory and Implementations [M]. Cambridge: Cambridge University Press, 2003.

[11] K P Thompson. Aberration Fields in Tilted and Decentered Optical Systems [D]. Cambridge: University of Arizona, 1980.