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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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Simple coherence measurement with a modified Lau interferometer.

A W Lohmann, J Ojeda-Castañeda, J Ibarra

    Optics Letters
    |October 28, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We present a simple, lens-free method to measure mutual intensity in quasi-monochromatic light using a rotating grating and a 1D receiver, mimicking a Lau interferometer.

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    Area of Science:

    • Optics
    • Interferometry
    • Wave phenomena

    Background:

    • Mutual intensity is a key parameter in understanding optical coherence.
    • Traditional methods for measuring mutual intensity often require complex setups, including lenses.

    Purpose of the Study:

    • To develop a simplified, lens-free method for measuring mutual intensity.
    • To demonstrate the feasibility of using a rotating grating as a component in coherence measurements.

    Main Methods:

    • Utilized a quasi-monochromatic light source.
    • Employed a simple optical setup consisting of a rotating grating and a one-dimensional receiver.
    • Analyzed the system's behavior as analogous to a mock Lau interferometer.

    Main Results:

    • Successfully measured mutual intensity without the need for lenses.
    • The experimental setup proved effective and straightforward.

    Conclusions:

    • The proposed method offers a simple and effective alternative for measuring mutual intensity.
    • The rotating grating functions as a viable component in coherence measurement systems, similar to a Lau interferometer.