Three-dimensional phase distribution near the focal plane is demonstrated by cross-section profiles of cophasal surfaces. The phase distribution in the focal plane and the phase anomaly in the focus are discussed in greater detail. Numerical results obtained are arranged systematically with Fresnel numbers sampled between 0.5 and 100, a sampling that covers conventional and unconventional cases.
© 1985 Optical Society of America
Yajun Li, "Phase distribution near the focus in systems of different Fresnel numbers," J. Opt. Soc. Am. A 2, 1677-1686 (1985)