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  2. Speckle (interference) - Wikipedia

    en.wikipedia.org/wiki/Speckle_(interference)

    Speckle imaging and eye testing using speckle also use the speckle effect. Speckle is the chief limitation of coherent lidar and coherent imaging in optical heterodyne detection. In the case of near field speckles, the statistical properties depend on the light scattering distribution of a given sample.

  3. Dynamic speckle - Wikipedia

    en.wikipedia.org/wiki/Dynamic_speckle

    In physics, dynamic speckle is a result of the temporal evolution of a speckle pattern where variations in the scattering elements responsible for the formation of the interference pattern in the static situation produce the changes that are seen in the speckle pattern, where its grains change their intensity (grey level) as well as their shape along time.

  4. Eye testing using speckle - Wikipedia

    en.wikipedia.org/wiki/Eye_testing_using_speckle

    When a surface is illuminated by a laser beam and is viewed by an observer, a speckle pattern is formed on the retina. [ 2 ] [ 3 ] If the observer has perfect vision, the image of the surface is also formed on the retina, and movement of the head will result in the speckle pattern and the surface moving together so that the speckle pattern ...

  5. Speckle imaging - Wikipedia

    en.wikipedia.org/wiki/Speckle_imaging

    Slow-motion speckle imaging movie, showing how a high-magnification (negative) image of a star breaks up into multiple blobs (speckles), entirely an atmospheric effect. Speckle imaging comprises a range of high-resolution astronomical imaging techniques based on the analysis of large numbers of short exposures that freeze the variation of ...

  6. Laser speckle contrast imaging - Wikipedia

    en.wikipedia.org/wiki/Laser_speckle_contrast_imaging

    Laser speckle contrast imaging (LSCI), also called laser speckle imaging (LSI), is an imaging modality based on the analysis of the blurring effect of the speckle pattern. The operation of LSCI is having a wide-field illumination of a rough surface through a coherent light source.

  7. Category:Speckle imaging - Wikipedia

    en.wikipedia.org/wiki/Category:Speckle_imaging

    Pages in category "Speckle imaging" The following 8 pages are in this category, out of 8 total. This list may not reflect recent changes. ...

  8. Interferometry - Wikipedia

    en.wikipedia.org/wiki/Interferometry

    It was later realized that speckle patterns could carry information about the object's surface deformations. Butters and Leendertz developed the technique of speckle pattern interferometry in 1970, [97] and since then, speckle has been exploited in a variety of other applications. A photograph is made of the speckle pattern before deformation ...

  9. Astronomical seeing - Wikipedia

    en.wikipedia.org/wiki/Astronomical_seeing

    The effects of atmospheric seeing are qualitatively similar throughout the visible and near infrared wavebands. At large telescopes the long exposure image resolution is generally slightly higher at longer wavelengths, and the timescale (t 0 - see below) for the changes in the dancing speckle patterns is substantially lower.