Optimizing trefoil phase plates design for color wavefront coding

Miguel Olvera-Angeles, Alfonso Padilla-Vivanco, Karina Ortega, José Sasian, Jim Schwiegerling, Justo Arines, Eva Acosta

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Wavefront coding refers to the use of a phase modulating element in conjunction with deconvolution to extend the depth of focus of an imaging system. The coding element is an asymmetrical phase plate shape, for most applications in the form of a trefoil or a cubic polynomial. Phase plates with trefoil shape generate not only the desired amount of trefoil aberration but also spherical aberration. It has been recently shown that a wavefront coding based optical system shows high tolerance to spherical aberration for monochromatic images; however, the depth of focus is considerably shortened for color images. In this work, we will show how to modify the shape of a phase plate in order to optimize its performance for color imaging. The design parameters of the phase plate are obtained by minimizing a merit function by means of genetic algorithms developed for this purpose. The evaluation of the optical characteristics of the phase plates for a feedback with the optimization algorithm is obtained by Zemax. Results will be illustrated by numerical simulations of color images.

Original languageEnglish (US)
Title of host publicationCurrent Developments in Lens Design and Optical Engineering XIX
EditorsR. Barry Johnson, Simon Thibault, Virendra N. Mahajan
ISBN (Electronic)9781510620612
StatePublished - 2018
Event19th Conference on Current Developments in Lens Design and Optical Engineering 2018 - San Diego, United States
Duration: Aug 21 2018Aug 22 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


Other19th Conference on Current Developments in Lens Design and Optical Engineering 2018
Country/TerritoryUnited States
CitySan Diego


  • Wavefront coding
  • color imaging
  • genetic algorithms
  • optimization
  • spherical aberration

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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