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Scanning Electron Microscopy01:07

Scanning Electron Microscopy

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A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
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Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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スキャニング定量切断干渉顕微鏡

Ying Ma, Yunze Lei, Taiqiang Dai

    Optics letters
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    PubMed
    まとめ
    この要約は機械生成です。

    スキャニング定量切断干渉顕微鏡 (SQSIM) は,空間的なクロスストークなしに正確な相回復を可能にすることで,定量相顕微鏡 (QPM) の限界を克服します. この多用途な技術は 生命科学や産業用アプリケーションに優れたイメージングを提供します.

    さらに関連する動画

    Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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    関連する実験動画

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    Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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    Dielectric RheoSANS &#8212; Simultaneous Interrogation of Impedance, Rheology and Small Angle Neutron Scattering of Complex Fluids
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    科学分野:

    • 光学顕微鏡
    • ステージイメージング
    • バイオ物理学

    背景:

    • 定量相顕微鏡 (QPM) は,相回復を通して透明なサンプルを分析するために不可欠です.
    • 伝統的なワイドフィールドのQPMは,コントラストが低下し,空間的なクロスストークによるアーティファクトに挑戦しています.
    • 改善された相回復と人工物減少を提供する先進的な顕微鏡技術が必要である.

    研究 の 目的:

    • 先進的なQPM技術としてスキャニング定量シーア干渉顕微鏡 (SQSIM) を導入する.
    • 空間的なクロストークを排除しながら,SQSIMのフェーズ回復を実行する能力を実証する.
    • 生命科学と産業におけるSQSIMの汎用性,安定性,潜在的応用を強調する.

    主な方法:

    • SQSIMは,相型空間光調節器 (SLM) とレーザーフォーカススキャン照明を組み合わせています.
    • このシステムは,任意の方向での可変切断偏差を正確に制御できます.
    • シミュレーションと実世界実験の両方による方法の検証.

    主要な成果:

    • SQSIMはフェーズ回復を効果的に可能にし,空間的なクロストークをうまく回避します.
    • この技術は,シンプルな構造,高い安定性,および他のイメージング方式との容易な統合を備えています.
    • 伝統的な方法と比較して優れた相画像能力を示した.

    結論:

    • SQSIMは,高品質のフェーズイメージングのための堅固なソリューションを提供し,従来のQPMの主要な制限を克服します.
    • その多機能性と精度は,幅広い目的とサンプルに適しています.
    • SQSIMは生命科学研究と産業検査の進歩に大きな希望を持っています.