White-light imaging with fractal zone plates

We report the achievement of the first images to our knowledge obtained with a fractal zone plates (FraZPs). FraZPs are diffractive lenses characterized by the fractal structure of their foci. This property predicts an improved performance of FraZPs as image forming devices with an extended depth of...

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Bibliographic Details
Published in:Optics letters 2007-08, Vol.32 (15), p.2109-2111
Main Authors: FURLAN, Walter D, SAAVEDRA, Genaro, MONSORIU, Juan A
Format: Article
Language:English
Subjects:
Exact sciences and technology
Filters, zone plates, and polarizers
Fundamental areas of phenomenology (including applications)
Imaging and optical processing
Modulation and optical transfer functions
Optical elements, devices, and systems
Optics
Physics
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Summary:We report the achievement of the first images to our knowledge obtained with a fractal zone plates (FraZPs). FraZPs are diffractive lenses characterized by the fractal structure of their foci. This property predicts an improved performance of FraZPs as image forming devices with an extended depth of field and predicts a reduced chromatic aberration under white-light illumination. These theoretical predictions are confirmed experimentally in this work. We show that the polychromatic modulation transfer function of a FraZP affected by defocus is about two times better than one corresponding to a Fresnel zone plate.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.32.002109