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Proceedings Paper

Multipole expansion for efficient calculation of focal distributions
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Paper Abstract

There is continued interest in calculation of the electromagnetic field distribution in the focal region of an optical system of high numerical aperture. Important applications include microscopy and optical information storage. Unfortunately direct evaluation of the diffraction integrals is extremely time-consuming. We have developed a new method in which the illumination is expanded in a series of multipole terms, each of which gives rise to a focal field which is an analytic function in three-dimensional space. The electric energy density in the focal region has been calculated for various lens and mirror systems.

Paper Details

Date Published: 5 February 1996
PDF: 4 pages
Proc. SPIE 2730, Second Iberoamerican Meeting on Optics, (5 February 1996); doi: 10.1117/12.231034
Show Author Affiliations
Colin J. R. Sheppard, Univ. of Sydney (Australia)
Peter Torok, Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 2730:
Second Iberoamerican Meeting on Optics
Daniel Malacara-Hernandez; Sofia E. Acosta-Ortiz; Ramon Rodriguez-Vera; Zacarias Malacara; Arquimedes A. Morales, Editor(s)

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