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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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,...
Overview of Microscopy Techniques01:22

Overview of Microscopy Techniques

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...
Overview of Electron Microscopy01:25

Overview of Electron Microscopy

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.
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

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...
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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 developed.

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Conducting Multiple Imaging Modes with One Fluorescence Microscope
08:32

Conducting Multiple Imaging Modes with One Fluorescence Microscope

Published on: October 28, 2018

Microscopy and its focal switch.

Stefan W Hell1

  • 1Max Planck Institute for Biophysical Chemistry, Department of NanoBiophotonics, 37070 Göttingen, Germany. hell@nanoscopy.de

Nature Methods
|January 1, 2009
PubMed
Summary
This summary is machine-generated.

Optical microscopes can now achieve nanoscale resolution, overcoming previous light diffraction limits. This advancement enables visualization of finer details than ever before using fluorescence microscopy techniques.

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Area of Science:

  • Optics and Photonics
  • Microscopy
  • Nanotechnology

Background:

  • Traditional lens-based microscopes were limited by diffraction, restricting resolution to approximately half the wavelength of light.
  • The diffraction limit posed a significant barrier to visualizing nanoscale structures.
  • Early 1990s saw the development of physical concepts to overcome this limitation.

Purpose of the Study:

  • To discuss the principles behind fluorescence microscopes achieving nanoscale spatial resolution.
  • To compare the implementation and operational differences of these advanced microscopy methods.
  • To outline potential future developments in super-resolution microscopy.

Main Methods:

  • Discussion of physical concepts enabling super-resolution.
  • Analysis of fluorescence microscopy techniques.
  • Comparative overview of different implementation strategies.

Main Results:

  • Development of readily applicable and widely accessible fluorescence microscopes.
  • Achieved nanoscale spatial resolution, surpassing the diffraction limit.
  • Established principles and operational differences of various super-resolution methods.

Conclusions:

  • Super-resolution fluorescence microscopy has revolutionized nanoscale imaging.
  • These techniques overcome the long-standing diffraction barrier in optical microscopy.
  • Ongoing research promises further advancements in nanoscale visualization capabilities.