Cjr. Sheppard et al., FOCAL DISTRIBUTION FOR SUPERRESOLVING TORALDO FILTERS, Journal of the Optical Society of America. A, Optics, image science,and vision., 15(4), 1998, pp. 849-856
The three-dimensional intensity distribution in the focal region of le
nses with filters consisting of arrays of rings is investigated in the
paraxial Debye regime. The axial behavior can exhibit a variety of di
fferent effects. (C) 1998 Optical Society of America.