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Related Experiment Video

Updated: Jun 8, 2026

Scanning Light Scattering Profiler (SLPS) Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses
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Refractive-index-profile determinations by using Lloyd's mirage.

B E Allman, A G Klein, K A Nugent

    Applied Optics
    |October 2, 2010
    PubMed
    Summary
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    This study introduces a novel method to measure refractive index profiles in optical waveguides. The technique adapts Lloyd's mirror experiment for precise optical characterization.

    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Optical waveguides are crucial components in modern photonics.
    • Accurate characterization of their refractive index profiles is essential for device performance.
    • Existing methods may have limitations for specific material types.

    Purpose of the Study:

    • To present a new experimental method for determining refractive-index profiles.
    • To enable characterization of planar media with monotonically decreasing refractive index.
    • To provide an alternative technique for optical waveguide analysis.

    Main Methods:

    • Generalization of the classical Lloyd's mirror experiment.
    • Utilizing interference patterns formed by a point source and its reflection (mirage).
    • Application to planar media with graded refractive indices.

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    Main Results:

    • Successful experimental determination of refractive-index profiles.
    • Demonstration of the technique's applicability to optical waveguide materials.
    • Validation of the generalized Lloyd's mirror approach.

    Conclusions:

    • The presented method offers a viable approach for refractive-index profiling.
    • This technique is particularly suited for optical waveguides and similar graded media.
    • The generalization of Lloyd's mirror experiment provides valuable insights into optical material characterization.