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Proceedings Paper

Off-axis focal shift for rotationally nonsymmetric pupils
Author(s): M. Martínez-Corral
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Paper Abstract

In this contribution we report an analytical formulation for evaluating along any line, directed towards the geometrical focus, the field diffracted by a rotationally nonsymmetric screen, at any Fresnel number. Our formula consists of two factors. The first factor involves a suitable 1-D Fourier transform of the azimuthally-averaged amplitude transmittance of the screen, around the point where the off-axial line intersects the screen plane. The second factor depends on the inverse distance to the aperture, and it is the responsible for the focal shift effect along the above mentioned straight lines, for low Fresnel numbers.

Paper Details

Date Published: 26 July 1993
PDF: 2 pages
Proc. SPIE 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 19831B (26 July 1993); doi: 10.1117/12.2308466
Show Author Affiliations
M. Martínez-Corral, Univ. de Valencia (Spain)


Published in SPIE Proceedings Vol. 1983:
16th Congress of the International Commission for Optics: Optics as a Key to High Technology
Gyorgy Akos; Tivadar Lippenyi; Gabor Lupkovics; Andras Podmaniczky, Editor(s)

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