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相关概念视频

Three-Dimensional Microscopy in Microbiology01:28

Three-Dimensional Microscopy in Microbiology

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Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...
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Confocal Fluorescence Microscopy01:16

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Overview of Microscopy Techniques01:22

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The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...
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Electron Microscope Tomography and Single-particle Reconstruction01:07

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
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Super-resolution Fluorescence Microscopy01:37

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Overview of Electron Microscopy01:25

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The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.
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Updated: Jun 10, 2025

Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
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单拍3D成像元显微镜

Huijie Hao1, Hao Wang2, Xinwei Wang3

  • 1Advanced Microscopy and Instrumentation Research Center, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150080, China.

Nano letters
|October 11, 2024
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概括
此摘要是机器生成的。

一个新的元显微镜使用全介电元表面生成一个双螺旋点传播函数. 这一创新使得生物和工业应用中更快,更简单,更准确的单次3D成像成为可能.

关键词:
在3D成像中使用3D成像.生物成像成像技术双螺旋点传播函数的双螺旋点传播函数.地表表层的表层.

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相关实验视频

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 生物医学成像技术 生物医学成像技术
  • 材料科学 材料科学 材料科学

背景情况:

  • 三维 (3D) 成像需要精确的轴定位,这对于生物成像和半导体检查等应用至关重要.
  • 传统的3D成像方法通常涉及重的光学或缓慢的扫描,限制速度和复杂性.
  • 超表面为操纵光线提供了一个新的平台,有可能克服传统光学系统的局限性.

研究的目的:

  • 开发一个紧而高效的3D成像显微镜,使用超表面技术.
  • 为了证明双螺旋 (DH) 点分布函数的生成,使用全介电元面来增强轴向定位.
  • 为了验证开发的元显微镜在4f和2f成像配置中的性能.

主要方法:

  • 制造一个全介电超表面以产生双螺旋 (DH) 点分布函数.
  • 将元表面集成到4f和2f显微镜系统中,以创建元显微镜.
  • 对4f和2f元显微镜的轴定位精度和检测范围的表征.
  • 对生物标本进行一次性3D成像的演示 (老鼠脏组织,桃子).

主要成果:

  • 4f元显微镜 (NA=0.7) 在15.47μm范围内实现了0.12μm以下的轴定位精度.
  • 2f-DH元显微镜 (NA=0.3) 在227.33μm范围内显示出1.12μm的精度.
  • 成功地实现了生物样本的单次精确3D成像,展示了该系统的实际实用性.

结论:

  • 开发的元显微镜在3D成像技术方面取得了重大进展.
  • 全介电超表面方法为3D定位和成像提供了一个紧的,高性能的解决方案.
  • 这项技术为各种科学和工业3D成像应用提供了一个多功能和高效的平台.