[2] Minsky M. Microscopy Apparatus[P]. U.S. Patent No.3013467, 1961-12-19.

[3] Davidovits P, Egger M D. Scanning laser microscope for biological investigations[J]. Appl. Opt , 1971, 10(7): 1615-1619.

[4] Sheppard C J R, Choudhury A. Image formation in the scanning microscope[J]. Optia Acta, 1977, 24(10): 1051-1073.

[5] Wilson T, Sheppard C J R. Theory and Practice of Scanning Optical Microscopy[M], London: Academic Press, 1984. 1-9.

[7] Cox I J, Sheppard C J R. Information capacity and resolution in an optical system[J]. Opt. Soc. Am A, 1986, 3(8): 1152-1157.