[1] M. Hammer and D. Schweitzer, Phys. Med. Biol. 47, 179 (2002).
[2] F. C. Delori and K. P. Pflibsen, Appl. Opt. 28, 1061 (1989).
[3] E. DeHoog and J. Schwiegerling, Appl. Opt. 47, 6769 (2008).
[4] E. DeHoog and J. Schwiegerling, Appl. Opt. 48, 221 (2009).
[5] N. Kishida and S. Ono, "Eye fundus examination apparatus" US Patent 7055955 (2006).
[6] N. Ichikawa and S. Ono, "Fundus camera" US Patent 7219996 (2007).
[7] C. Li, Q. Sun, Y. Liu, Q. Lu, J. Wang, J. Sun, J. Liu, and F. Qu, Chin. J. Opt. Appl. Opt. (in Chinese) 3, 363 (2010).
[8] Z. Wang and Y. Xu, Opt. Precis. Eng. (in Chinese) 16, 1567 (2008).
[9] Y. Xu, Z. Wang, and Y. Tian, Acta Photon. Sin. (in Chinese) 38, 1122 (2009) .
[10] Y. Zhang, G. Zhao, X. Zhang, and Y. Gu, Opt. Precis. Eng. (in Chinese) 17, 1014 (2009).
[11] H. Ye, Z. Gao, T. Luo, and Y. Huang, Chin. Opt. Lett. 8, 689 (2010).
