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関連する概念動画

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

6.5K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
6.5K
Design Example: Traverse Angle Computations01:25

Design Example: Traverse Angle Computations

364
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...
364
Sight Distance in a Vertical Curve01:29

Sight Distance in a Vertical Curve

404
Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...
404
Gradient and Del Operator01:14

Gradient and Del Operator

4.6K
In mathematics and physics, the gradient and del operator are fundamental concepts used to describe the behavior of functions and fields in space. The gradient is a mathematical operator that gives both the magnitude and direction of the maximum spatial rate of change. Consider a person standing on a mountain. The slope of the mountain at any given point is not defined unless it is quantified in a particular direction. For this reason, a "directional derivative" is defined, which is a vector...
4.6K
Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

1.0K
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...
1.0K

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関連する実験動画

Updated: Feb 21, 2026

Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses
06:55

Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses

Published on: June 6, 2017

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理想化されたグラデントインデックスレンズを超えたレイトレーシング方法.

V Chávez-Islas, E Espíndola-Ramos, F H Maldonado-Villamizar

    Optics express
    |February 20, 2026
    PubMed
    まとめ

    新しいレイ・トレーシング・メソッドは,複雑で理想的でないデザインを含むグラデントインデックス (GRIN) レンズの光を正確にモデル化しています. この汎用性のあるツールは,事前解読なしにGRINレンズモデリングを簡素化し,光学シミュレーションを強化します.

    科学分野:

    • 光学とフォトニック
    • 計算物理学の物理

    背景:

    • グラデントインデックス (GRIN) レンズは,様々な光学アプリケーションにおいて極めて重要です.
    • 既存のレイトレーシング方法は,理想的で対称なGRINレンズ構成に限られていることが多い.
    • 複雑な非理想的なGRINレンズの幾何学をモデル化することは,依然として課題です.

    研究 の 目的:

    • 理想化および非理想化GRINレンズの両方のために,汎用的なレイトレーシング方法を開発する.
    • 任意のGRINメディアを扱う現行の方法の限界を克服するために.
    • GRINレンズモデリングのための数値的に安定し,正確なツールを提供するために.

    主な方法:

    • 固定された光学経路の長さ,ステップサイズに基づいた新しいレイトレーシングアルゴリズム.
    • GRIN媒体のプレディスクリテーションの必要性を排除する.
    • 任意のGRINレンズ設計における光の拡散をモデリングするための実装.

    主要な成果:

    • この方法は,シンプルなおよび複雑なGRINレンズ幾何学の両方の線を成功裏に追跡します.
    • 強力な数学的安定性とシミュレーションにおける高い精度を示した.
    • 固定ステップサイズのアプローチは,モデリングプロセスを簡素化します.

    さらに関連する動画

    Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
    05:14

    Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

    Published on: September 16, 2025

    640
    Measuring the Behavioral Effects of Intraocular Scatter
    05:10

    Measuring the Behavioral Effects of Intraocular Scatter

    Published on: February 18, 2021

    3.9K

    関連する実験動画

    Last Updated: Feb 21, 2026

    Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses
    06:55

    Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses

    Published on: June 6, 2017

    8.0K
    Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
    05:14

    Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

    Published on: September 16, 2025

    640
    Measuring the Behavioral Effects of Intraocular Scatter
    05:10

    Measuring the Behavioral Effects of Intraocular Scatter

    Published on: February 18, 2021

    3.9K

    結論:

    • 提示されたレイトレーシング方法は,GRINレンズモデリングのための汎用的で堅牢なソリューションを提供します.
    • これは, ray tracing の適用範囲を非理想的な光学システムに大幅に拡張します.
    • この研究は,GRIN光学で働く研究者やエンジニアにとって貴重なツールとなります.