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Optical Engineering

Tight focusing of wavefronts with piecewise quasi-constant phase
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Paper Abstract

The Richards-Wolf approach to analyze tight focusing by high-numerical-aperture aplanatic optical systems was designed to treat incident waves having a planar (or negligibly curved) wavefront at the entrance pupil. In this paper we extend the approach to incorporate also wavefronts with piecewise quasi-constant phase. The evaluation of the field distribution in the vicinity of the geometrical focus is accomplished by linear superposition of the contributions from all the segments with quasi-constant phase. As an application example, a tightly focused optical field is evaluated for a π-phase-step-modulated incident wavefront.

Paper Details

Date Published: 1 February 2009
PDF: 5 pages
Opt. Eng. 48(2) 028001 doi: 10.1117/1.3081093
Published in: Optical Engineering Volume 48, Issue 2
Show Author Affiliations
Alexander Normatov, Technion-Israel Institute of Technology (Israel)
Boris Spektor, Technion-Israel Institute of Technology (Israel)
Joseph Shamir, Technion-Israel Institute of Technology (Israel)

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