Title

Axial Field Shaping Under High-Numerical-Aperture Focusing

Abstract

Kant reported [J. Mod. Optics 47, 905 (2000)] a formulation for solving the inverse problem of vector diffraction, which accurately models high-NA focusing. Here, Kant's formulation is adapted to the method of generalized projections to obtain an algorithm for designing diffractive optical elements (DOEs) that reshape the axial point-spread function (PSF). The algorithm is applied to design a binary phase-only DOE that superresolves the axial PSF with controlled increase in axial sidelobes. An 11-zone DOE is identified that axially narrows the PSF central lobe by 29% while maintaining the sidelobe intensity at or below 52% of the peak intensity. This DOE could improve the resolution achievable in several applications without significantly complicating the optical system. © 2007 Optical Society of America.

Publication Date

3-1-2007

Publication Title

Optics Letters

Volume

32

Issue

5

Number of Pages

527-529

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.32.000527

Socpus ID

33847671481 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33847671481

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