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Results 12231 - 12240 of 12303 for Optical
  • An Introduction to Industrial Laser Beam Profiling
    Article - 14 Sep 2015
    Laser beam profiling can prove to be a valuable practice when incorporated into the laser’s planned, corrective or preventative maintenance routines.
  • A History of Nineteenth Century Photography: Bringing Astronomy and Medicine into Focus
    Article - 23 Apr 2015
    The invention and establishment of the wet collodion process and the dry-plate negative led to great advancements in the fields of astronomy and medicine in the second half of the nineteenth century.
  • Using Thermal Infrared Multispectral for the Imaging of Minerals
    Article - 15 Jul 2014
    Multispectral imaging involves acquisition of multiple images of the same scene utilizing different spectral filters, representing a great compromise between hyperspectral imaging and broadband...
  • Gouy Phase-Shift - Explanation and Principle
    Article - 15 May 2014
    The Gouy phase shift is a popular axial phase shift that occurs in a converging light wave when it passes through its focus in propagating from -‡ to +‡ . The Gouy phase shift is an additional phase...
  • 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.
  • An Introduction Doppler Cooling
    Article - 15 May 2014
    Doppler cooling is the laser based cooling of small particles, such as ions and atoms, which are trapped during the cooling process. It also involves the spontaneous emission of photons, which...
  • Radiant Flux - Explanation and References
    Article - 29 May 2014
    Radiant flux is the energy per unit time that is radiated from an optical source, expressed in terms of Watts.
  • Population Inversion - Definition and References
    Article - 29 May 2014
    Population inversion is a condition of the laser medium where a system consisting of a group of molecules or atoms exists in a higher excited state with more quantum systems than that of the lower...
  • Laser Mode Locking - Theory and Applications
    Article - 29 May 2014
    Mode locking is a technique used to obtain ultra short pulses from lasers. Lasers that are mode locked are capable of producing pulses having pulse widths in the order of sub-pico seconds or even...
  • What is an M Squared Value?
    Article - 5 Aug 2014
    M2value is a parameter used to determine the beam quality of the laser beam. M2may be derived by dividing the beam parameter product (BPP) of an actual optic beam by the BPP of an ideal Gaussian beam...

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