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  • VIPA Fabrication
    Article - 21 Jun 2016
    Virtually imaged phase arrays (VIPAs) (Figure 1) are a special kind of Fabry-Perot etalon composed of three unique coatings. An anti-reflection coated section represents a surface of a VIPA and is...
  • Electroluminescence - Definition and Applications
    Article - 15 May 2014
    Electroluminescence is the characteristic of a material to emit light when an electric current is passed through it, or when subjected to a strong electric field.
  • Collimator - Definition and Applications
    Article - 15 May 2014
    Collimator is a device used for changing the direction of a light diverging from a point source into a parallel beam. The collimation of light is necessary to make spectroscopic measurements.
  • Chemiluminescence - Definition and Applications
    Article - 1 May 2014
    Chemiluminescence is the process of generating electromagnetic radiation by releasing energy as a result of a chemical reaction.
  • Bragg Mirrors - Definition and Applications
    Article - 15 May 2014
    A Bragg mirror, also known as a dielectric mirror, is a kind of mirror made up of alternating thin optical layers of two different materials. A quarter-wave mirror is the most commonly used Bragg...
  • What is a Folded Resonator?
    Article - 6 Aug 2014
    A folded resonator is a type of resonator construction in which the interior optical path is bent with the help of mirrors.
  • What are Wave Optics?
    Article - 8 Sep 2014
    Wave optics, also referred to as physical optics, is the branch of optics that enables important phenomena such as interference, diffraction, and polarization to be understood.
  • Speckle Pattern - Introduction and Applications
    Article - 15 May 2014
    Speckle pattern is a random granular pattern produced by the reflection of coherent light beam e.g. laser, at a rough surface such as a metallic surface, a display screen, white paint or a piece of...
  • Refractometer - Definition and Applications
    Article - 6 May 2014
    A refractometer is an optical device used for measuring the extent to which light is bent or refracted when it moves through a substance.
  • What are Photons?
    Article - 15 Sep 2014
    The term photon was coined by Gilbert Lewis in 1926. A photon is a type of elementary particle that forms the basic unit of electromagnetic radiation, which includes infrared, ultraviolet, visible...

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