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Proceedings Paper

Inverse focal shift in truncated cylindrical waves
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Paper Abstract

We report on a general analytical procedure to analyze the axial focusing properties of uniform cylindrical waves truncated by a rectangular window. The resulting on axis diffraction pattern explicitly depends on the square of the window height-to-width ratio. Depending on the value of this parameter, different kinds of axial behavior are observed. In particular, it is found that for low values of this parameter and low Fresnel number, an inverse focal-shift phenomenon can appear.

Paper Details

Date Published: 19 July 1999
PDF: 2 pages
Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); doi: 10.1117/12.354952
Show Author Affiliations
Carlos J. Zapata-Rodriguez, Univ. de Valencia (Spain)
Manuel Martinez-Corral, Univ. de Valencia (Spain)
Pedro Andres, Univ. de Valencia (Spain)
Amparo Pons Marti, Univ. de Valencia (Spain)

Published in SPIE Proceedings Vol. 3749:
18th Congress of the International Commission for Optics
Alexander J. Glass; Joseph W. Goodman; Milton Chang; Arthur H. Guenther; Toshimitsu Asakura, Editor(s)

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