[1] Amos W B, White J G, Fordham M. Use of confocal imaging in the study of biological structures. Appl. Opt., 1987, 26(16): 3239～3243

[2] Sheppard C J R, Gu M, Mao X Q. Three-dimensional transfer function in a reflection-mode confocal scanning microscopes. Opt. Commu., 1991, 81(5): 281～284

[3] Drazic V. Three-dimensional transfuntion of coherent confocal microscopes with extended source and detector. J. Mod. Opt., 1992, 39(8): 1777～1790

[5] Goodman J W. Introduction to Fourier Optics. New York: Mc Graw-Hill, 1968.

[6] Corle T R, Chou C H, Kino G S. Depth response of confocal optical microscopes. Opt. Lett., 1986, 11(12): 770～772