[1] Ih C S.Appl Opt,1972;11(3):694～695
[2] spherical aberration.Opt Commun(accepted for publication)
[3] Klingsporn P E.Appl Opt,1976;15(10):2355～2357
[4] Dew S K,Parsons R R.Appl Opt,1992;31(18):3416～3419
[5] Deng X,Liang X,Chen Z et al.Appl Opt,1986;25(3):377～381
[6] Stevenson R M,Norman M J,Bett T H et al.Opt Lett,1994;19(6):363～365
[7] Dixit S N,Feit M D,Perry M D et al.Opt Lett,1996;21(21):1715～1717
[8] Xie C,Gupta R,Metcalf H.Opt Lett,1993;18(2):173～175
[9] Veldkamp W B.Rev Scient Instrum,1982;53(3):294～297
[10] Pu J X.Focusing Gaussian beam by an annular lens with spherical aberration.J Mod Opt(to be published)
[11] Yoshida A,Asakura T.Opt Commun,1996;123(4/6):694～704
[12] Herrero R M,Mejias P M,Hodgson N.IEEE J Q E,1995;31(12):2173～2176
[13] Pu J X,Zhang H H.Intensity distribution of Gaussian beams focused by a lens with
[14] Jiang D Y,Stamnes J J.Pure Appl Opt,1997;6:85～96
[15] Li Y.Optik,1983;64(3):207～218