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Results 2171 - 2180 of 2261 for Eye
  • 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...
  • Moiré Pattern - Description and Applications
    Article - 15 May 2014
    Moiré patterns occur when materials are overlapped with repetitive lines. It is a naturally occurring interference pattern created by overlaying similar but slightly offset templates.
  • What is Magnification Power?
    Article - 24 Oct 2014
    Magnifying power is defined as the ratio between the dimensions of the image and the object. The process of magnification can occur in lenses, telescopes, microscopes and even in slide projectors....
  • What is a Periscope?
    Article - 11 Sep 2014
    A periscope can be defined as an optical instrument that allows the viewing of objects that are not in the direct life of vision. Periscopes prove to be of great help to submariners to have a view of...
  • Xenon Fluoride Excimer Lasers – Properties and Applications
    Article - 25 Apr 2014
    Xenon fluoride (XeF) excimer laser consists of xenon, a noble gas, and fluorine, a halogen.
  • Xenon Chloride Excimer Lasers – Properties and Applications
    Article - 25 Apr 2014
    Xenon chloride (XeCl) excimer laser consists of xenon, a noble gas, and chlorine, a halogen, combined to act as a lasing medium.
  • Krypton Fluoride Excimer Laser – Properties and Applications
    Article - 25 Apr 2014
    The krypton fluoride (KrF) laser is an excimer laser which emits deep ultraviolet wavelengths. It consists of two elements, namely krypton and fluorine, as the lasing medium.
  • Night Vision Goggles - How Night Vision Goggles Work
    Article - 21 Feb 2008
    Night vision devices or NVDs provides an individual the ability to maneuver and see at night and during times when the visibility is poor.
  • Liquid Lens - An Introduction to Liquid Lens
    Article - 21 Nov 2007
    The theory behind liquid lens is based on the properties of one or more fluids to create magnifications within a small amount of space. Liquid lens can be considered as "infinitely variables" lens...
  • Glare - What is Glare and How Does it Occur?
    Article - 19 Nov 2007
    When there is an excessive contrast between the dark areas and bright areas in the direction of viewing, then glare can result. Simply, when there is too much light hitting the surface, this...

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