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相关概念视频

Vector Representation of Complex Numbers01:16

Vector Representation of Complex Numbers

449
Complex numbers, represented in Cartesian coordinates, can also be visualized as vectors. These vectors can be expressed in polar form, emphasizing their magnitude and angle. When a complex number is input into a function, the output is another complex number, highlighting the function's zero point from which the vector representation can originate.
Consider a function defined as the product of the complex factors in the numerator divided by the product of the complex factors in the...
449
Design Example: Traverse Angle Computations01:25

Design Example: Traverse Angle Computations

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Traverse angle computations are a critical component of surveying, used to compute the internal angles within a closed traverse. A traverse consists of a series of connected lines forming a closed loop, often used for land boundary delineation or mapping. Calculating the internal angles ensures accuracy in the traverse geometry and is essential for checking survey data integrity.The process begins with known azimuths and bearings of the traverse sides. Internal angles at each vertex are...
284
Vector Algebra: Method of Components01:08

Vector Algebra: Method of Components

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It is cumbersome to find the magnitudes of vectors using the parallelogram rule or using the graphical method to perform mathematical operations like addition, subtraction, and multiplication. There are two ways to circumvent this algebraic complexity. One way is to draw the vectors to scale, as in navigation, and read approximate vector lengths and angles (directions) from the graphs. The other way is to use the method of components.
In many applications, the magnitudes and directions of...
18.7K
Plane Electromagnetic Waves I01:30

Plane Electromagnetic Waves I

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The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
The EM field is assumed to be a...
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Vector Components in the Cartesian Coordinate System01:29

Vector Components in the Cartesian Coordinate System

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Vectors are usually described in terms of their components in a coordinate system. Even in everyday life, we naturally invoke the concept of orthogonal projections in a rectangular coordinate system. For example, if someone gives you directions for a particular location, you will be told to go a few km in a direction like east, west, north, or south, along with the angle in which you are supposed to move. In a rectangular (Cartesian) xy-coordinate system in a plane, a point in a plane is...
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Kirchoff's Laws using Phasors01:12

Kirchoff's Laws using Phasors

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Analyzing AC circuits in electrical systems is a fundamental aspect of electrical engineering. In these circuits, AC power is supplied from a distribution panel and wired to various household appliances in parallel. To perform a comprehensive analysis, electrical engineers use Kirchhoff's voltage and current laws, which are equally applicable in AC circuits as in DC circuits.
Kirchhoff's voltage law (KVL) states that the sum of phasor voltages around a closed loop in an AC circuit equals zero....
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相关实验视频

Updated: Jan 8, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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任意复杂的振幅配置文件的矢量射线跟踪方案通过给定的光学系统.

Shilpa Singh, Bosanta R Boruah

    Journal of the Optical Society of America. A, Optics, image science, and vision
    |December 18, 2025
    PubMed
    概括

    本研究介绍了一种射线追踪方法,用于计算光学系统的焦点能量密度. 新模型准确计算了各种光极化的能量密度,改进了光学系统的设计.

    科学领域:

    • 光学和光子学 在光学和光子学.
    • 计算物理 计算物理

    背景情况:

    • 准确的焦能量密度分析对于优化使用聚焦光的光学系统至关重要.
    • 现有的方法可能无法完全捕捉焦点平面上的光的复杂行为.

    研究的目的:

    • 为计算焦点能量密度和点图开发一个几何射线跟踪方案.
    • 为了整合矢量光特性,以实现更现实的焦点模拟.

    主要方法:

    • 使用Python开发了一个光线跟踪模型,结合了镜头参数 (曲率半径,厚度,焦距,折射率).
    • 该模型模拟来自空间光调节器的任意光束配置,并使用4f继电镜对.
    • 它追踪了对轴和斜射线,考虑到每个射线的光向量性质.

    主要成果:

    • 该方案计算了矢量点图,表示不同偏振的能量密度.
    • 对低数值光圈镜头和高数值光圈镜头进行了模拟.
    • 结果显示与已建立的矢量衍射理论相比,相似之处和差异.

    结论:

    • 拟议的光线追踪方法为焦点分析提供了一个现实的计算方法.
    • 该模型通过准确预测能量密度,促进光学系统的设计和性能改进.

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  • 整合矢量光特性可以提高焦点预测的准确性.