[1] [1] James L. Fergason. Optical system for head mounted display using retro-reflector and method of displaying an image[P]. U.S. Patent 5,621,572 (15 April 1997)

[2] [2] Hong Hua, Chunyu Gao, Frank Biocca et al.. An ultra-light and compact design and implementation of head-mounted projective displays[C]. Proc. IEEE-VR 2001 (IEEE Computer Society, Los Alamitos, Calif., 2001). 175～182

[3] [3] Hong Hua, Chunyu Gao, Leonard Brown et al.. A testbed for precise registration, natural occlusion, and interaction in an augmented environment using a head-mounted projective display (HMPD)[C]. Proc. IEEE VR 2002 (IEEE Computer Society, Los Alamitos, Calif., 2002). 81～89

[4] [4] Hong Hua, Chunyu Gao, Leonard Brown et al.. Using a head-mounted projective display in interactive augmented environments[C]. Proc. IEEE and ACM International Symposium on Augmented Reality 2001 ( Association for Computing Machinery, New York, 2001). 217～223

[5] [5] Hong Hua, Axelle Girardot, Chunyu Gao et al.. Engineering of head-mounted projective display[J]. Appl. Opt., 2000, 39(22): 3814～3824

[10] [10] Yonggang Ha, Jannick Rolland. Optical assessment of head-mounted displays in visual space[J]. Appl. Opt., 2002, 41(25): 5282～5289

[11] [11] Jannick P. Rolland. Wide-angle, off-axis, see-through head-mounted display[J]. Opt. Engng., 2000, 39(7): 1760～1767

[12] [12] Hong Hua, Yonggang Ha, Jannick P. Rolland. Design of an ultralight and compact projection lens[J]. Appl. Opt., 2003, 42(1): 97～107