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Proceedings Paper

Spiral diffractive optical elements
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Paper Abstract

Conventional diffractive optical elements with symmetry of revolution like spherical zone plate or axicons are modified by an addition of linear phase change n(theta) along the angular coordinate, where n is a natural number. In consequence of such manipulation the zone borders convert from circles into spirals and the elements modified in this way exhibit a dark dip in the center of the intensity distributions of their diffraction fields, in some cases (e.g. for n equals 1) smaller than the position of the first minimum of the respective distribution of the conventional case. The new family of elements is illustrated by examples of a spiral zone plate as well as spiral linear and logarithmic axicons, and their possible applications in alignment techniques are discussed.

Paper Details

Date Published: 12 October 1994
PDF: 10 pages
Proc. SPIE 2169, Nonconventional Optical Imaging Elements, (12 October 1994); doi: 10.1117/12.190231
Show Author Affiliations
Zbigniew Jaroszewicz, Univ. de Santiago (Spain)
Andrzej Kolodziejczyk, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 2169:
Nonconventional Optical Imaging Elements
Jerzy Nowak; Marek Zajac, Editor(s)

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