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Related Experiment Video

Updated: Jun 10, 2026

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
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Zero axial irradiance by annular screens with angular variation.

J Ojeda-Castañeda, P Andrés, M Martínez-Corral

    Applied Optics
    |August 21, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Researchers created a 3D diffraction pattern with zero light on the optical axis using special annular screens. This technique is useful for precise optical alignment applications.

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    Area of Science:

    • Optics and Photonics
    • Diffraction Physics

    Background:

    • Optical alignment often requires precise control over light patterns.
    • Achieving zero irradiance along the optical axis can be challenging but beneficial.

    Purpose of the Study:

    • To develop a method for creating a three-dimensional diffraction pattern with zero axial irradiance.
    • To explore the use of specific annular screens for generating this pattern.

    Main Methods:

    • Utilizing annular screens shaped as phase daisies, daisy flowers, or pies.
    • Implementing a phase retardation of 180 degrees in alternating slices of the screens.
    • Designing screens with an even number of slices and equal central angles.

    Main Results:

    • Successfully generated a three-dimensional diffraction pattern with zero irradiance along the optical axis.
    • Demonstrated that phase daisies, daisy flowers, and pies are effective screen designs.
    • Identified this pattern as a specific solution within a broader class of functions.

    Conclusions:

    • Annular screens with specific phase modulations can effectively create zero axial irradiance patterns.
    • This method offers a convenient approach for optical alignment.
    • The described patterns represent a subset of functions capable of producing zero irradiance on the optical axis.