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Pseudo zone plate for extended focal depth

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Abstract

For extending the focal depth of an optical system, we propose to merge axially the foci of a radially symmetric, phase-only zone plate. We show that focal depth is extended by a factor N, if the zone plate has N rings with phase delays that follow a spread spectrum sequence.

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Authors and Affiliations

  1. DICIS, University of Guanajuato, Salamanca, Guanajuato, 36885, México

    Jorge Ojeda-Castañeda

  2. Research Center for Nanotechnologies, University of Veracruz, Veracruz, 94292, México

    Ángel Sauceda-Carvajal

  3. Centro Investigaciones en Óptica, P. Box 1-948, León, Guanajuato, 37000, México

    J. E. A. Landgrave

Authors
  1. Jorge Ojeda-Castañeda
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  2. Ángel Sauceda-Carvajal
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  3. J. E. A. Landgrave
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Ojeda-Castañeda, J., Sauceda-Carvajal, Á. & Landgrave, J.E.A. Pseudo zone plate for extended focal depth. Opt. Mem. Neural Networks 18, 164–170 (2009). https://doi.org/10.3103/S1060992X09030059

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  • DOI: https://doi.org/10.3103/S1060992X09030059

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