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Results 251 - 260 of 348 for Lens
  • The Twyman Green Interferometer
    Article - 6 Feb 2014
    The Twyman-Green interferometer is an instrument for testing optical components such as lenses and prisms. It was invented and patented by English electrical engineer Frank Twyman and English chemist...
  • Telecentric Lenses and Their Application
    Article - 6 Feb 2014
    Telecentric lens is a compound lens used in imaging systems to make objects appear to be the same size independent of their location in space.
  • Speckle Pattern - Introduction and Applications
    Article - 4 Feb 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...
  • 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...
  • What is Optical Resolution?
    Article - 21 Jan 2014
    Optical resolution is the physical resolution at which an imaging device can capture an image.
  • The Applications of Refraction
    Article - 20 Jan 2014
    Refraction is a phenomenon that happens when waves passing from one transparent medium to another bend at the boundary between the two mediums.
  • What is a Prism?
    Article - 20 Jan 2014
    A prism is a transparent geometric optical object with a minimum of two polished plane faces inclined relative to each other, from which light is reflected or through which light is refracted.
  • What is a Pinhole Camera?
    Article - 17 Jan 2014
    A pinhole camera, also known as camera obscura or "dark chamber", is a simple camera that has a single small aperture called pinhole instead of a lens.
  • Optical Coherence - Definition and Applications
    Article - 8 Jan 2014
    Optical coherence is associated with interference effects of light. A field of light is said to be coherent when the electric field values at different locations are in a fixed phase.
  • Gaussian Beam - Definition and Parameters
    Article - 6 Jan 2014
    A Gaussian beam is a beam of electromagnetic radiation with intensity distributions and transverse electric field represented by Gaussian functions.

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