[2] Pribram J K, Penchina C M. Appl. Opt., 1968, 7(10): 2005.
[4] Reader Joseph. J. Opt. Soc. Am., 1969, 59(9): 1189.
[5] Shafer A, Megill L, Droppleman L. J. Opt. Soc. Am., 1964, 54(9): 1189.
[6] Masayuki Futamata, Takehiko Takenouchi, Kei-ichi Katakura. Applied Optics, 2002, 41(22): 4656.