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Results 731 - 740 of 1108 for Optical
  • Beam Divergence
    Article - 19 Sep 2014
    Beam divergence of an electromagnetic beam is defined as a measure of increase in laser beam diameter or radius with respect to the distance from an antenna aperture or optical aperture through which...
  • The Twyman Green Interferometer
    Article - 4 Aug 2014
    The Twyman-Green interferometer is an instrument for testing optical components such as lenses and prisms. It was invented and patented by English electrical engineer Frank Twyman and English chemist...
  • Phase-Contrast Microscope - Definition and Applications
    Article - 6 May 2014
    Phase-contrast microscope is a type of light microscopy that intensifies contrasts of transparent and colorless objects by influencing the optical path of light. Phase-contrast microscopy is an...
  • Exploring the Molecular Nature of Memory with Imaging Technology
    Article - 9 Sep 2014
    Wei Min, Assistant Professor at Columbia University and his team have investigated the synthesis of protein at a specific site in the tissue of the brain using a new imaging technique in order to...
  • What is Brillouin Scattering?
    Article - 11 Jul 2013
    Brillouin scattering may be described as a phenomenon of inelastic scattering of light in a physical medium brought about by thermally excited acoustical phonons. Brillouin scattering is usually...
  • What is a Beamsplitter?
    Article - 5 Jun 2013
    Beamsplitters are elements that redirect a portion of the incident beam of light and allow the rest of the light to continue in the original direction.
  • Indium Gallium Arsenide Phosphide Lasers – Properties and Applications
    Article - 15 Aug 2013
    The indium gallium arsenide phosphide is a quarternary compound semiconductor material. The compound is basically an alloy of gallium arsenide and indium phosphide. Lasers having indium gallium...
  • Erbium Doped Glass Lasers – Properties and Applications
    Article - 15 Aug 2013
    Erbium is a chemical element belonging to the category of rare earth metals. The trivalent ion of erbium (Er3+) is often used as the dopant for a number of glass and crystal lasers.
  • Chemical Oxygen Iodine Lasers (COIL) - Properties, Development, and Commercial and Military Applications
    Article - 18 Jun 2013
    Chemical oxygen iodine laser (COIL) is an infrared chemical laser that has been developed at the Air Force Research Laboratory in 1977, primarily for military applications. It outputs a beam of...
  • What is Raman Spectroscopy?
    Article - 22 Aug 2012
    Raman spectroscopy is a widely used technique that can help identify chemicals or materials by the way in which they scatter light.

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