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Common-path interferometry with one-dimensional periodic filters.

Victor Arrizón1, David Sánchez-de-la-Llave

  • 1Instituto Nacional de Astrofísica, Optica y Electrónica, Apartado Postal 51 y 216, Puebla, Pue. 72000, Mexico. arrizon@inaoep.mx

Optics Letters
|January 28, 2004
PubMed
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This study introduces a spatial filtering interferometry system using periodic filters for phase object analysis. The setup effectively generates interference patterns for detailed optical field examination.

Area of Science:

  • Optics and Photonics
  • Interferometry
  • Spatial Filtering

Background:

  • Interferometry is crucial for optical metrology and imaging.
  • Spatial filtering techniques enhance image quality and extract specific information.
  • Phase objects require specialized methods for accurate characterization.

Purpose of the Study:

  • To present a novel spatial filtering interferometry setup.
  • To demonstrate the use of periodic spatial filters (cosine transmittance or binary phase modulation) for interferometry.
  • To analyze the attributes and advantages of this new setup.

Main Methods:

  • Implementing a spatial filtering interferometry system with a dual-window input plane.
  • Utilizing periodic spatial filters with controlled frequency and orientation.

Related Experiment Videos

  • Employing a binary phase periodic filter with a spatial light modulator for experimental validation.

    • Main Results:

    • Successful generation of interference patterns from phase objects and reference beams.
    • Demonstration of the setup's capability to produce clear interference fringes at the output plane.
    • Experimental validation of the system's performance using a spatial light modulator.

    Conclusions:

    • The proposed spatial filtering interferometry setup is effective for analyzing phase objects.
    • Periodic spatial filters, particularly binary phase filters, offer advantages in generating interference patterns.
    • The system provides a versatile platform for optical field characterization and metrology.