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Polarization-splitting common-path interferometer based on a zero-twist liquid crystal display.

Ignacio Moreno1, Jeffrey A Davis, Felix A Klein

  • 1Departamento de Ciencia de Materiales, Optica y Tecnología Electrónica, Universidad Miguel Hernández, Elche, Alicante, Spain. i.moreno@umh.es

Applied Optics
|April 12, 2008
PubMed
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We developed a compact polarization-splitting interferometer using a programmable liquid crystal display (LCD) grating. This device efficiently generates interferograms for analyzing optical properties and visualizing complex light structures like optical vortices.

Area of Science:

  • Optics and Photonics
  • Liquid Crystal Displays
  • Interferometry

Background:

  • Common-path interferometers offer stability.
  • Liquid crystal displays (LCDs) provide programmable optical elements.

Purpose of the Study:

  • To present a compact, programmable polarization-splitting interferometer.
  • To demonstrate its capability in generating and analyzing interferograms.

Main Methods:

  • Utilized a zero-twist liquid crystal display (LCD) encoded with a diffraction grating.
  • Illuminated the LCD with a dual-component polarization state.
  • Separated beams based on polarization and diffraction by the grating.
  • Employed an analyzer polarizer to create interferograms.

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Main Results:

  • Successfully created a compact, common-path interferometer.
  • Demonstrated the system's ability to display retardance patterns and analyze external birefringent elements.
  • Experimentally visualized optical vortices with varying topological charges.

Conclusions:

  • The programmable LCD-based interferometer offers a versatile platform for optical analysis.
  • This compact system enhances the utility of interferograms for advanced optical measurements.