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Related Concept Videos

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.
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,...
Two-Dimensional Microscopy in Microbiology01:29

Two-Dimensional Microscopy in Microbiology

Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
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...
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.

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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

Fluorescence microscopy below the diffraction limit.

George H Patterson1

  • 1Biophotonics Section, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, USA. pattersg@mail.nih.gov

Seminars in Cell & Developmental Biology
|August 25, 2009
PubMed
Summary
This summary is machine-generated.

Super-resolution microscopy overcomes light diffraction limits, achieving up to 10x higher resolution than conventional methods. These advanced fluorescence imaging techniques are revolutionizing biological visualization.

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Area of Science:

  • Optics and Photonics
  • Biomedical Imaging
  • Cell Biology

Background:

  • Conventional fluorescence microscopy has seen significant improvements in sensitivity and speed.
  • However, achieving resolution beyond the diffraction limit of light remained a major challenge.
  • Recent breakthroughs have enabled overcoming this fundamental limitation.

Purpose of the Study:

  • To provide an overview of emerging super-resolution imaging techniques.
  • To highlight methods that surpass the diffraction limit in fluorescence microscopy.
  • To discuss advancements in biological visualization.

Main Methods:

  • Review of super-resolution microscopy techniques.
  • Discussion of methods surpassing the diffraction limit.
  • Analysis of advancements in fluorescence imaging.

Main Results:

  • Super-resolution methods can now achieve resolutions up to 10 times greater than conventional microscopy.
  • These techniques effectively overcome the diffraction barrier.
  • Significant progress has been made in enhancing imaging capabilities.

Conclusions:

  • Super-resolution microscopy represents a major leap in imaging technology.
  • These methods offer unprecedented detail in visualizing biological structures.
  • The field is rapidly advancing, promising further innovations in microscopy.