Inverse focal shift in truncated cylindrical waves

Carlos J. Zapata-Rodriguez; Manuel Martinez-Corral; Pedro Andres; Amparo Pons Marti

doi:10.1117/12.354952

19 July 1999 Inverse focal shift in truncated cylindrical waves

Carlos J. Zapata-Rodriguez, Manuel Martinez-Corral, Pedro Andres, Amparo Pons Marti

Proceedings Volume 3749, 18th Congress of the International Commission for Optics; (1999) https://doi.org/10.1117/12.354952
Event: ICO XVIII 18th Congress of the International Commission for Optics, 1999, San Francisco, CA, United States

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.

Citation Download Citation

Carlos J. Zapata-Rodriguez, Manuel Martinez-Corral, Pedro Andres, and Amparo Pons Marti "Inverse focal shift in truncated cylindrical waves", Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); https://doi.org/10.1117/12.354952

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