In order to achieve the lateral superresolution imaging of an optical imaging system, a three-zone and multi-values
phase-only pupil filter is designed to achieve the superresolution of full width at half maximum GL=0.65, Strehl ratio
S=0.118 and ratio of maximal side lobe intensity with pupil and main lobe intensity without pupil M=0.912, which is
based on pupil filter techniques and uses genetic optimizing algorithm. A three-zone phase-only pupil supperresolution
confocal microscopy imaging method is established by integrating the three-zone and multi-values phase-only pupil filter
designed with confocal microscopy system (CMS). Simulation results indicate that, when CMS lateral superresolution of
GL=0.56, S=0.118 is achieved, the approach proposed can suppress the increasing of side lobe M caused by three-zone
phase-only superresolution pupil from 0.912 to 0.02, and obviously improve CMS lateral resolution and imaging quality.
A three-zone and two-value phase-only pupil filter is also designed, and its central intensity is slightly smaller than that
of the multi-values pupil designed for the same G, however, its process technology is superior, it is better for practical
It is therefore concluded that the design method proposed provides an effective technical approach for the
design of superresolution pupil filters.