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Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
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Related Experiment Video

Updated: Apr 1, 2026

Method to Measure Tone of Axial and Proximal Muscle
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Twisted Schell-model beams with axial symmetry.

Riccardo Borghi, Franco Gori, Giorgio Guattari

    Optics Letters
    |October 1, 2015
    PubMed
    Summary

    This study solves when partially coherent beams can be twisted. A modal analysis determines if beams withstand twisting, revealing some beams cannot be twisted regardless of parameters.

    Area of Science:

    • Optics and Photonics
    • Wave Phenomena
    • Coherent Beam Properties

    Background:

    • Partially coherent beams are crucial in various optical applications.
    • Imparting a twist to a beam can alter its propagation characteristics.
    • Understanding the limits of twistability is essential for beam shaping and control.

    Purpose of the Study:

    • To determine the conditions under which a twist can be imparted to a partially coherent beam.
    • To develop a method for evaluating the twistability of Schell-model fields with axial symmetry.
    • To identify specific beam properties and correlation functions that prevent twisting.

    Main Methods:

    • Utilized modal analysis for partially coherent Schell-model fields with axial symmetry.
    • Developed a framework to evaluate the beam's ability to withstand a twisting process.

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  • Investigated the influence of different correlation functions on twistability.

    • Main Results:

    • A comprehensive solution is provided for the problem of twistability in partially coherent beams.
    • Modal analysis successfully predicts whether a beam can be twisted.
    • Demonstrated that certain correlation functions inherently prevent a beam from being twisted, irrespective of numerical parameters.

    Conclusions:

    • The twistability of partially coherent Schell-model beams is rigorously defined.
    • Modal analysis offers a predictive tool for beam twisting applications.
    • The findings highlight fundamental limitations in twisting beams with specific correlation properties, impacting optical system design.