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Related Concept Videos

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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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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Related Experiment Video

Updated: Dec 21, 2025

Visualization of the Immunological Synapse by Dual Color Time-gated Stimulated Emission Depletion STED Nanoscopy
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Dual-color STED super-resolution microscope using a single laser source.

Jialin Wang1, Jia Zhang1, Luwei Wang1

  • 1Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong, China.

Journal of Biophotonics
|May 19, 2020
PubMed
Summary
This summary is machine-generated.

We developed a low-cost, dual-color Stimulated Emission Depletion (STED) microscope using a single laser source. This system achieves 75 nm resolution for imaging biological samples.

Keywords:
STED microscopycell imagingdual-color imagingsuper-resolutionsupercontinuum laser

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Area of Science:

  • Biophotonics
  • Super-resolution Microscopy
  • Cellular Imaging

Background:

  • Stimulated Emission Depletion (STED) microscopy offers high resolution and fast imaging capabilities.
  • Existing STED systems can be complex and costly.

Purpose of the Study:

  • To present a novel, cost-effective dual-color STED microscope.
  • To demonstrate its capability for high-resolution cellular imaging.

Main Methods:

  • Utilized a single supercontinuum laser source.
  • Employed polarization beam splitters to generate dual excitation (488, 635 nm) and depletion (592, 775 nm) beams.
  • Constructed a dual-color STED system.

Main Results:

  • Achieved a spatial resolution of 75 nm in cell samples.
  • Demonstrated dual-color imaging capability with a simplified setup.

Conclusions:

  • The developed system provides a low-cost alternative for dual-color super-resolution imaging.
  • This technology enables high-resolution visualization of cellular structures.