Axial super-resolution of Gaussian beam by pupil filters

The general axial super-resolving theories for Gaussian beam have been investigated. The three-zone amplitude pupils are adopted to provide specific numerical descriptions of axial super-resolution of Gaussian beam. Simulated results of comparisons between the Gaussian beam and the Uniform amplitude beam has been presented. Furthermore, some useful advices for the design of super-resolving pupils based on the Gaussian beam are given.