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Related Experiment Videos

High-contrast white-light Lau fringes.

J Lancis1, G Mínguez-Vega, E Tajahuerce

  • 1Departament de Ciències Experimentals, Universitat Jaume I, Castelló 12080, Spain. lancis@exp.uji.es

Optics Letters
|January 28, 2004
PubMed
Summary

We developed a novel optical setup for creating Lau fringes using incoherent light. This method achieves nearly 100% fringe visibility with white light, unlike prior monochromatic techniques.

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Area of Science:

  • Optics
  • Interferometry
  • Diffraction Optics

Background:

  • Lau fringes are typically generated using spatially coherent or monochromatic light sources.
  • Achieving high-visibility Lau fringes with spatially incoherent and broadband light presents significant challenges.

Purpose of the Study:

  • To introduce a new optical assembly capable of producing Lau fringes under spatially incoherent illumination.
  • To demonstrate the feasibility of achieving high fringe visibility with broadband light in such a setup.

Main Methods:

  • Employing gratinglike codification of a spatially incoherent source.
  • Utilizing an achromatic Fresnel diffraction setup.

Main Results:

  • The proposed optical assembly successfully generates Lau fringes with spatially incoherent illumination.

Related Experiment Videos

  • Nearly 100% fringe visibility was achieved using broadband (white) light.
  • The setup's white-light capability contrasts with traditional monochromatic implementations.

    • Conclusions:

    • The developed optical assembly offers a novel approach to Lau fringe generation, overcoming limitations of previous methods.
    • The ability to use broadband light opens new avenues for applications requiring white-light interferometry.