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Related Concept Videos

Scanning Electron Microscopy01:07

Scanning Electron Microscopy

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.
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Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...
The Electromagnetic Spectrum02:37

The Electromagnetic Spectrum

The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
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.
Transmission Electron Microscopy01:15

Transmission Electron Microscopy

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 keV in...

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A Novel Method for In Situ Electromechanical Characterization of Nanoscale Specimens
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Published on: June 2, 2017

Electromagnetic imaging methods for nondestructive evaluation applications.

Yiming Deng1, Xin Liu

  • 1Imaging and Image Processing Laboratory, Department of Electrical Engineering, University of Colorado Denver, Denver, CO 80217, USA. yiming.deng@ucdenver.edu

Sensors (Basel, Switzerland)
|January 17, 2012
PubMed
Summary
This summary is machine-generated.

Electromagnetic nondestructive evaluation (NDE) uses advanced imaging for material analysis. This review summarizes research and discusses future directions for electromagnetic NDE imaging techniques.

Keywords:
electromagnetic imagingnondestructive evaluationnoninvasive imagingstructural health monitoring

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Physics

Background:

  • Electromagnetic nondestructive tests are crucial in nondestructive evaluation (NDE).
  • Recent advancements in sensing, imaging, and material science have broadened NDE applications.
  • Sophisticated system designs enhance the potential of electromagnetic NDE imaging.

Purpose of the Study:

  • To provide a comprehensive summary of electromagnetic imaging methods in NDE.
  • To discuss current research trends and future directions in the field.
  • To highlight the expanding capabilities and applications of electromagnetic NDE imaging.

Main Methods:

  • Literature review of electromagnetic imaging techniques for NDE.
  • Analysis of advancements in sensing technology, hardware, software, and image processing.
  • Synthesis of research findings on electromagnetic NDE applications.

Main Results:

  • Electromagnetic NDE imaging has seen significant expansion in application fields.
  • Advances in technology have led to more sophisticated system designs.
  • The potential for electromagnetic NDE imaging is considered virtually unlimited.

Conclusions:

  • Electromagnetic NDE imaging is a rapidly evolving field with vast potential.
  • Continued research in sensing, processing, and materials will drive further innovation.
  • Future directions point towards increasingly sophisticated and widespread applications of electromagnetic NDE.