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Speckle pattern analysis of crumpled papers.

Vahideh Farzam Rad, Evelio E Ramírez-Miquet, Humberto Cabrera

    Applied Optics
    |September 11, 2019
    PubMed
    Summary
    This summary is machine-generated.

    Laser speckle analysis (LSA) reveals structural differences in crumpled and folded papers. This method offers a straightforward way to quantitatively assess the structure of various crumpled materials.

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    Area of Science:

    • Physics
    • Materials Science
    • Biophysics

    Background:

    • Crumpling and folding are common phenomena across biological and non-biological systems, from DNA packing to paper compaction.
    • Laser speckle analysis (LSA) is a powerful technique for characterizing materials, with advancements in digital imaging enhancing its applicability.

    Purpose of the Study:

    • To investigate the utility of laser speckle analysis (LSA) for characterizing the structure of crumpled thin sheets.
    • To determine if LSA can differentiate between various states of paper folding and crumpling.

    Main Methods:

    • Application of laser speckle analysis (LSA) to paper samples that were randomly crumpled and folded one, two, and three times.
    • Analysis of both numerical and graphical laser speckle patterns.

    Main Results:

    • Significant differences in LSA parameters were observed between randomly crumpled and variously folded paper samples.
    • LSA effectively captured variations in the structural complexity introduced by different folding and crumpling methods.

    Conclusions:

    • Laser speckle analysis (LSA) provides valuable, quantitative insights into the structure of crumpled thin sheets.
    • The LSA methodology is easily implementable for assessing similar phenomena and material structures.