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Related Concept Videos

Deflection of a Beam01:19

Deflection of a Beam

Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
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...
Prismatic Beams: Problem Solving01:15

Prismatic Beams: Problem Solving

In the design of a supported timber beam subjected to a distributed load, both the beam's physical dimensions and the timber's characteristics, such as its grade and species, are critical. These factors determine the allowable stress values, which are crucial for calculating the necessary beam depth to ensure structural integrity and safety.
The design begins with analyzing the beam as a free body to identify moments and force balances, thereby determining support reactions. Next, the designer...
Gauss's Law: Cylindrical Symmetry01:20

Gauss's Law: Cylindrical Symmetry

A charge distribution has cylindrical symmetry if the charge density depends only upon the distance from the axis of the cylinder and does not vary along the axis or with the direction about the axis. In other words, if a system varies if it is rotated around the axis or shifted along the axis, it does not have cylindrical symmetry. In real systems, we do not have infinite cylinders; however, if the cylindrical object is considerably longer than the radius from it that we are interested in,...
Gauss's Law01:07

Gauss's Law

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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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Related Experiment Video

Updated: Jul 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 ray-equivalent modeling and optical design.

R Herloski1, S Marshall, R Antos

  • 1Xerox Corporation, Joseph C. Wilson Center for Technology, Webster, New York, 14580, USA.

Applied Optics
|April 15, 1983
PubMed
Summary

This study simplifies Gaussian beam transformation modeling using paraxial ray heights and slopes. These new equations aid in designing and optimizing optical systems with Gaussian beams.

Area of Science:

  • Optics
  • Optical Engineering
  • Laser Physics

Background:

  • Gaussian beams are fundamental in laser optics and optical system design.
  • Modeling beam propagation and transformation is crucial for system performance.
  • Existing methods can be complex for astigmatic beams.

Purpose of the Study:

  • To develop simplified equations for modeling astigmatic Gaussian beam propagation.
  • To integrate these equations into optical design software for optimization.
  • To demonstrate the utility of the new method with design examples.

Main Methods:

  • Derivation of simplified equations from the ABCD law of Gaussian beam transformation.
  • Utilizing paraxial ray heights and slopes as the sole terms in the equations.

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Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads
07:58

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads

Published on: July 25, 2025

Related Experiment Videos

Last Updated: Jul 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

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads
07:58

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads

Published on: July 25, 2025

  • Application within a conventional automatic optical design program (CODE-V).
  • Main Results:

    • Successfully modeled astigmatic Gaussian beam propagation and transformation.
    • Developed simple, effective equations based on ray parameters.
    • Demonstrated practical application in optical system design and optimization.

    Conclusions:

    • The proposed method offers a simplified approach to designing Gaussian beam optical systems.
    • The equations are compatible with standard optical design software.
    • This facilitates efficient optimization of systems involving astigmatic Gaussian beams.