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  • Photodiodes - Their Working Principles and Applications
    Article - 29 May 2014
    A photodiode is a kind of light detector which involves conversion of light into voltage or current based on the mode of operation of the device. It consists of built-in lenses, optical filters, and...
  • Researchers Produced Material That Can Bend Light in Opposite Direction
    News - 14 Oct 2007
    A Princeton-led research team has created an easy-to-produce material from the stuff of computer chips that has the rare ability to bend light in the opposite direction from all naturally occurring...
  • 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.
  • What is Optical Resolution?
    Article - 30 Oct 2014
    Optical resolution is the physical resolution at which an imaging device can capture an image.
  • 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...
  • 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.
  • Catadioptric System Definition and Applications
    Article - 6 May 2014
    Catadioptric systems may be defined as optical systems that make use of lenses and mirrors for the formation of images.
  • Cassegrain Telescope - Definition and Applications
    Article - 1 May 2014
    The Cassegrain telescope is an astronomical reflecting telescope in which the light is incident on a large concave paraboloid mirror and reflected onto a smaller convex hyperboloid mirror.
  • Light Sheet Microscopy - Applications and Benefits
    Article - 6 May 2014
    Light sheet fluorescence microscopy (LSFM), also known as selective plane illumination microscopy (SPIM), is a non-destructive, versatile imaging tool that operates as a microscope and microtome using...
  • A Warm South Pole on Neptune
    News - 25 Sep 2007
    An international team of astronomers using ESO's Very Large Telescope has discovered that the south pole of Neptune is much hotter than the rest of the planet. This is consistent with the fact...

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