[2] [2] Sheppard C J R, Hegedus Z S. Axial behavior of pupil-plane filters. J. Opt. Soc. Am. A, 1988, 5(5):643～647

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

[5] [5] Hegedus Z S, Sarafis V. Superresolving filters in confocally scanned imagingsystems. J. Opt. Soc. Am. (A), 1986, 3(11): 1892～1896

[7] [7] Sieracki C K, Huang E W. A leaky annular pupil for improved lateral resolution in confocal fluorescence microscopy. Proc. SPIE, 1994, 2184: 120～126

[10] [10] Martinez-Corral M, Andres P, Zapata-Rodriguez C. Improvement of three-dimensional resolution in cofocal scanning microscopy by combination of two pupil filters. Optik, 1998, 107(4): 145～148