相关实验视频

Updated: Jun 6, 2025

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

21.7K

相邻的双环Airyprime-Gaussian光束阵列的自我聚焦形态

Jiahao Chen, Jian He, Yimin Zhou

    Optics express
    |November 22, 2024
    PubMed
    概括

    这项研究探讨了相邻的双环Airyprime-Gaussian光束阵列 (JDAPGBA) 的自我聚焦特性. 通过调整一个系数 (β),研究人员实现了双重自我聚焦和控制聚焦间隔,实验证实了这一点.

    更多相关视频

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator08:39

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

    Published on: January 28, 2019

    9.7K
    Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating10:39

    Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

    Published on: October 11, 2016

    9.6K

    相关概念视频

    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...
    213
    Beams with Symmetric Loadings01:15

    Beams with Symmetric Loadings

    The moment-area method is an analytical tool used in structural engineering to determine the slope and deflection of beams under various loads. Consider a cantilever with a concentrated load and moment at the free end. The first step is constructing a free-body diagram to calculate the reactions at the fixed end. Next, the bending moment diagram is plotted to visualize how the bending moment varies along the beam's length, focusing on points where the bending moment equals zero.
    The M/EI...
    182
    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...
    105
    Gauss's Law: Planar Symmetry01:27

    Gauss's Law: Planar Symmetry

    A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
    7.8K
    Gauss's Law: Spherical Symmetry01:26

    Gauss's Law: Spherical Symmetry

    A charge distribution has spherical symmetry if the density of charge depends only on the distance from a point in space and not on the direction. In other words, if the system is rotated, it doesn't look different. For instance, if a sphere of radius R is uniformly charged with charge density ρ0, then the distribution has spherical symmetry. On the other hand, if a sphere of radius R is charged so that the top half of the sphere has a uniform charge density ρ1 and the bottom half...
    7.4K
    Beams with Unsymmetric Loadings01:17

    Beams with Unsymmetric Loadings

    Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
    The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
    112