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Results 12471 - 12480 of 12536 for Optical
  • 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...
  • Axicon Lenses and their Application
    Article - 19 Sep 2014
    The axicon lens is a specialized lens that bears a conical surface. The axicon lens images a point source as a line along the optic axis.
  • Toric Lens - Definition and Applications
    Article - 30 Apr 2014
    Toric lens is a special type of lens having two different focal length and optical power in orientations that are perpendicular to each other.
  • 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...
  • Schmidt Prism - Definition and Properties
    Article - 12 Feb 2014
    Schmidt prism, also referred to as Schmidt–Pechan prism, is a prism that reverts an image while deviating the line of sight by 45°. It is a type of optical roof prism.
  • 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.
  • Pechan Prism: Definition and Working Principle
    Article - 18 Jul 2014
    Pechan prisms comprise two air-spaced components, and have the ability to revert (flip horizontally) or invert (flip vertically) an image, depending upon it's orientation. It can be used in...
  • What is a Focal Point?
    Article - 5 Aug 2014
    A focal point is a common point on the principal axis where all the light rays starting from the object converge.

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