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Unconventional imaging with radial Walsh filters
Author(s): Walter D. Furlan; Federico Machado; Vicente Ferrando; Juan A. Monsoriu
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Paper Abstract

In this work, we report the achievement of images obtained with radial Walsh filters. Derived from Walsh functions, radial Walsh filters are phase binary diffractive optical elements characterized by a set of equal-area concentric rings that take the phase values 0 or π, corresponding to +1 or -1 transmittance values of the corresponding Walsh function. Then, a radial Walsh filter can be re-interpreted as an aperiodic zone plate with self-similar multi-focusing properties under monochromatic illumination and, therefore, multi-imaging capabilities. We have implemented these unconventional lenses with a spatial light modulator and the first images obtained with this type of lenses are presented and evaluated.

Paper Details

Date Published: 24 May 2018
PDF: 6 pages
Proc. SPIE 10677, Unconventional Optical Imaging, 106772N (24 May 2018); doi: 10.1117/12.2306984
Show Author Affiliations
Walter D. Furlan, Univ. de València (Spain)
Federico Machado, Univ. Politècnica de València (Spain)
Vicente Ferrando, Univ. Politècnica de València (Spain)
Juan A. Monsoriu, Univ. Politècnica de València (Spain)

Published in SPIE Proceedings Vol. 10677:
Unconventional Optical Imaging
Corinne Fournier; Marc P. Georges; Gabriel Popescu, Editor(s)

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