Polarization Fourier filtering with a 4f system using geometric phase lenses

Pascuala García-Martínez; Ignacio Moreno

doi:10.1117/12.2675639

7 August 2023 Polarization Fourier filtering with a 4f system using geometric phase lenses

Pascuala García-Martínez, Ignacio Moreno

Proceedings Volume 12624, Digital Optical Technologies 2023; 1262410 (2023) https://doi.org/10.1117/12.2675639
Event: SPIE Digital Optical Technologies, 2023, Munich, Germany

Abstract

We present a novel optical system for image processing using geometric-phase lenses, or Pancharatnam-Berry lenses. These are patterned half-wave plates, where the optical axis follows a quadratic relation with the radial coordinate. They are planar lenses that offer high diffraction efficiency and polarization selectivity, and present convergent and divergent focalization for left and right circularly polarized input light. This polarization selectivity introduces a new degree of freedom for optical imaging. Different simple band-pass filtering experiments for binary objects are presented. As a new optical device, the unique performance of such multifunctional geometric-phase lenses offers potential applications in optical imaging.

Citation Download Citation

Pascuala García-Martínez and Ignacio Moreno "Polarization Fourier filtering with a 4f system using geometric phase lenses", Proc. SPIE 12624, Digital Optical Technologies 2023, 1262410 (7 August 2023); https://doi.org/10.1117/12.2675639

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KEYWORDS

Tunable filters

Polarization

Fourier transforms

Lenses

Image filtering

Signal processing

Optical filters

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