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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.
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...
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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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Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope
14:09

Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope

Published on: April 7, 2014

Statistical approach for subwavelength measurements with a conventional light microscope.

D Palanker1, A Lewis

  • 1Division of Applied Physics, The Hebrew University of Jerusalem, Jerusalem, Israel.

Biophysical Journal
|May 12, 2009
PubMed
Summary

This study introduces a novel theoretical method for subwavelength measurements using conventional microscopes and statistical analysis. The technique allows for imaging nanoscale objects, significantly smaller than the microscope

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Area of Science:

  • Optical microscopy
  • Nanoscale imaging
  • Subwavelength measurement techniques

Background:

  • Conventional light microscopes have limited resolution due to the diffraction limit.
  • Measuring objects smaller than the diffraction limit requires advanced techniques.
  • Contrast-enhancing parameters like fluorescence and second harmonic generation are crucial for imaging specific features.

Purpose of the Study:

  • To develop a theoretical method for subwavelength measurements using conventional microscopy.
  • To enable the measurement of nanoscale objects with high resolution.
  • To utilize statistical analysis of images acquired through subwavelength apertures or laser scanning.

Main Methods:

  • Theoretical development of a method employing statistical analysis of images.
  • Utilizing a conventional light microscope with a set of subwavelength apertures.
  • Alternative method involves repeated scanning of a laser beam over a defined area.

Main Results:

  • Demonstrated ability to obtain information on microdomains significantly smaller than aperture diameter (up to 30x smaller).
  • Achieved nanoscale resolution, measuring objects approximately 10 nm using 0.3 μm apertures.
  • Developed technology for producing masks with appropriate subwavelength apertures.

Conclusions:

  • The proposed methodology enables subwavelength measurements beyond the diffraction limit of light.
  • Instrumentation for realizing these statistical methodologies with apertures or scanning laser beams is described.
  • This approach offers a pathway for high-resolution imaging and measurement of nanoscale structures.