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Results 481 - 490 of 555 for Laser Systems
  • Optical Pumping - Definition and Applications
    Article - 12 Mar 2014
    Optical pumping is a process in which light energy is used to excite electrons from a lower to higher energy level. It was first developed by Alfred Kastler in the early 1950s. It is primarily used to...
  • Beam Profiler - Definition and Applications
    Article - 12 Mar 2014
    Measurement of the optical beam profile is of critical importance in a number of laser applications.
  • Metastable States - Definition and Applications in Optics
    Article - 28 Feb 2014
    Metastable state is an excited state of an atom or other system with a longer lifetime than the other excited states. However, it has a shorter lifetime than the stable ground state.
  • Meniscus Lens and Their Application
    Article - 28 Feb 2014
    Meniscus lens is a lens having two spherical curved surfaces, convex on one side and concave on the other side. It is thicker at the center than at the edges. The lens provides a smaller beam diameter...
  • Aiming Beam and Coaxial Laser Beam
    Article - 27 Feb 2014
    An aiming beam is a laser beam (or any other light source) which is used as a light for guiding.
  • What is Ultraviolet Light (UV)?
    Article - 7 Feb 2014
    Ultraviolet (UV) light is a portion of the electromagnetic spectrum between the visible rays and X-rays. It lies in the frequency range of 10 to 400 nm with photon energies from 3 to 124 eV.
  • Sagnac Interferometer - Definition and Applications
    Article - 4 Feb 2014
    The Sagnac interferometer uses counter-propagating beams in a ring path. This is realized by either using multiple mirrors or with an optical fiber. Generally, three or more mirrors are used, so that...
  • Optical 3D Metrology in Industrial Opthalmic Applications
    Article - 27 Jan 2014
    With hundreds of millions of people choosing contacts for either visual or aesthetic reasons, and millions more having surgery to solve vision problems associated with aging, there is a growing need...
  • Fizeau Interferometer - Definition and Applications
    Article - 3 Jan 2014
    Interferometric measurements can be carried out in an optical arrangement in which two or more beams originated from the same source, but passing in different paths are made to interfere....
  • What is an Aperture?
    Article - 31 Dec 2013
    An aperture is an opening or a hole through which light passes by. In an optical system, the aperture is the opening that defines the cone angle of a set of light rays that converges at a focal point...

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