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Coherence imaging by use of a Newton rings sampling function.

A G Podoleanu, G M Dobre, D J Webb

    Optics Letters
    |November 3, 2009
    PubMed
    Summary

    Orthogonal galvo-scanning mirrors in a Michelson interferometer create Newton rings, enabling depth-resolved imaging with low-coherence light. This method allows for fast image display using a storage oscilloscope.

    Area of Science:

    • Optical physics
    • Interferometry
    • Imaging techniques

    Background:

    • Michelson interferometers are fundamental tools in optics.
    • Depth-resolved imaging is crucial for analyzing sample structures.
    • Newton's rings are an optical phenomenon typically observed in thin film analysis.

    Purpose of the Study:

    • To demonstrate a novel method for transversal depth-resolved imaging using a Michelson interferometer.
    • To utilize orthogonal galvo-scanning mirrors to generate a specific sampling function.
    • To develop a fast imaging display technique.

    Main Methods:

    • Implementing suitable optics within a Michelson interferometer arm.
    • Employing orthogonal galvo-scanning mirrors to create a Newton's rings sampling function.

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  • Using a low-coherence light source for depth resolution.
  • Developing a fast display procedure with a storage oscilloscope.

    • Main Results:

    • Successfully generated a sampling function in the form of Newton rings.
    • Achieved transversal depth-resolved imaging capabilities.
    • Demonstrated a fast image display method.

    Conclusions:

    • The integration of galvo-scanning mirrors and a Michelson interferometer enables novel depth-resolved imaging.
    • The Newton's rings sampling function is key to achieving transversal imaging.
    • The developed method offers a fast and efficient approach for image display in interferometric systems.