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Related Concept Videos

Two-Dimensional Microscopy in Microbiology01:29

Two-Dimensional Microscopy in Microbiology

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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...
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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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Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

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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...
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Overview of Electron Microscopy01:25

Overview of Electron Microscopy

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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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Transmission Electron Microscopy01:15

Transmission Electron Microscopy

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In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
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Scanning Electron Microscopy01:07

Scanning Electron Microscopy

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A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
Fundamental Principles
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Updated: Nov 14, 2025

A Guide to Build a Highly Inclined Swept Tile Microscope for Extended Field-of-view Single-molecule Imaging
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Microscope basics.

Greenfield Sluder1, Joshua J Nordberg

  • 1Department of Cell Biology, University of Massachusetts Medical School, Worcester, Massachusetts, USA.

Methods in Cell Biology
|August 13, 2013
PubMed
Summary
This summary is machine-generated.

This chapter explains microscope optics and video camera integration. It details finite tube-length and infinity optics microscopes, crucial for cell biology research and imaging.

Keywords:
Charge-coupled deviceFinite tube-length microscopeIntermediate image planeIntermediate imagesTrinocular head

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Area of Science:

  • Microscopy
  • Cell Biology Optics
  • Scientific Imaging

Background:

  • Modern cell biology research relies on advanced microscopy techniques.
  • Understanding microscope optics is essential for effective specimen imaging.
  • Two primary microscope designs exist: finite tube-length and infinity optics.

Purpose of the Study:

  • To elucidate the working principles of microscopes.
  • To discuss considerations for integrating video cameras with microscopes.
  • To compare finite tube-length and infinity optics microscope systems.

Main Methods:

  • Explanation of objective lens function in image formation.
  • Description of image projection in finite tube-length microscopes.
  • Analysis of image projection in infinity optics microscopes.

Main Results:

  • Finite tube-length microscopes form a real intermediate image.
  • Infinity optics microscopes project images to infinity.
  • Common objective types include plan achromats, plan apochromats, and plan fluorite lenses.

Conclusions:

  • Microscope optical design significantly impacts imaging capabilities.
  • Proper understanding of optics is vital for successful video camera attachment.
  • Both microscope types and objective lens choices influence research outcomes.