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Related Concept Videos

Design of Prismatic Beams for Bending01:23

Design of Prismatic Beams for Bending

The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and stress...
X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
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Shear on the Horizontal Face of a Beam Element01:16

Shear on the Horizontal Face of a Beam Element

To understand shear on the flat side of a prismatic beam element, consider the vertical and horizontal shearing forces, and the normal forces, acting on the element. The element's upper (U) and lower (L) sections, which are divided by the beam's neutral axis, are examined. The equilibrium of these forces is determined by applying the equilibrium equation, which helps identify the horizontal shearing force. This force is directly related to the bending moments and the cross-section's first...
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Interference and Diffraction

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Deformation of a Beam under Transverse Loading

Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
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Related Experiment Video

Updated: Jun 8, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Gaussian-beam profile shaping by acousto-optic Bragg diffraction.

M D McNeill, T C Poon

    Applied Optics
    |October 12, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Researchers can reshape Gaussian laser beams into desired forms using acousto-optic Bragg diffraction. This method enables conversion to near-field or far-field flattop profiles by controlling light-sound interactions.

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    Three-dimensional Optical-resolution Photoacoustic Microscopy
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    Published on: May 3, 2011

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    Last Updated: Jun 8, 2026

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
    12:14

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

    Published on: August 12, 2013

    Three-dimensional Optical-resolution Photoacoustic Microscopy
    08:31

    Three-dimensional Optical-resolution Photoacoustic Microscopy

    Published on: May 3, 2011

    Area of Science:

    • Optics and Photonics
    • Acousto-Optics
    • Laser Beam Shaping

    Background:

    • Gaussian laser beams are common but often require modification for specific applications.
    • Controlling laser beam profiles is crucial in fields like laser processing and optical communications.

    Purpose of the Study:

    • To investigate the use of acousto-optic Bragg diffraction for transforming Gaussian laser beam profiles.
    • To demonstrate the feasibility of converting Gaussian beams into flattop profiles.

    Main Methods:

    • Utilizing acousto-optic Bragg diffraction by employing acoustic gratings.
    • Exploiting the angular dependence of plane wave diffraction by acoustic gratings.
    • Analyzing the conversion of beam profiles in both near-field and far-field.

    Main Results:

    • Successfully demonstrated the modification of Gaussian laser-beam profiles.
    • Achieved conversion into desired flattop beam profiles.
    • Showcased the capability for both near-field and far-field flattop generation.

    Conclusions:

    • Acousto-optic Bragg diffraction is an effective method for laser beam shaping.
    • The technique allows for precise control over laser beam profiles, generating flattop distributions.
    • This offers a versatile approach for tailoring laser beams for advanced applications.