[1] [1] Cox I J, Sheppard C J R. Information capacity and resolution in an optical system. J. Opt. Soc. Am. (A), 1986, 3(8):1152～1158

[2] [2] Sales T R M, Morris G M. Fundamental limits of optical superresolution. Opt. Lett., 1997, 22(9):582～584

[3] [3] Sales T R M, Morris G M. Diffractive superresolution elements. J. Opt. Soc. Am. (A), 1997, 14(7):1637～1646

[4] [4] Ando H. Phase-shifting apodizer of three or more portions. Jpn. J. Appl. Phys., 1992, 31(2B):557～567

[5] [5] Cox I J, Sheppard C J R. Reappraisal of arrays of concentric annuli as superresolving filters. J. Opt. Soc. Am., 1982, 72(9):1287～1291

[6] [6] den Dekker A J, van den Bos A. Resolution: A survey. J. Opt. Soc. Am. (A), 1997, 14(3):547～557

[7] [7] Mcutchen C W. Superresolution in microscopy and the abbe resolution limit. J. Opt. Soc. Am., 1967, 57(10):1190～1192

[8] [8] Lokosz W. Optical system with resolving power exceeding the classical limit. J. Opt. Soc. Am., 1966, 56(11):1463～1472

[10] [10] Welford W T. Use of annular aperture to increase focal depth. J. Opt. Soc. Am., 1960, 50(8):749～753