- speckle pattern
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the visual appearance of a star as viewed through a large telescope, with irregularities caused by the distorting effect of local turbulence in the earth's atmosphere.[1960-65]
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Universalium. 2010.
speckle pattern
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Speckle pattern — A speckle pattern is a random intensity pattern produced by the mutual interference of a set of wavefronts. This phenomenon has been investigated by scientists since the time of Newton, but speckles have come into prominence since the invention… … Wikipedia
speckle pattern — Astron. the visual appearance of a star as viewed through a large telescope, with irregularities caused by the distorting effect of local turbulence in the earth s atmosphere. [1960 65] … Useful english dictionary
Electronic speckle pattern interferometry — (ESPI) [Jones R Wykes C, Holographic and Speckle Interferometry, 1989, Cambridge University Press] , also known as TV Holography, is a technique which uses laser light, together with video detection, recording and processing to visualise static… … Wikipedia
Speckle imaging — (also known as video astronomy ) describes a range of high resolution astronomical imaging techniques based either on the shift and add ( image stacking ) method or on speckle interferometry methods. These techniques can dramatically increase the … Wikipedia
speckle interferometry — noun : interferometry in which a composite image of an object is made by recording individual speckle images over a period of time ; specifically : such a technique used in astronomy to generate a clear image of a celestial body blurred by… … Useful english dictionary
speckle interferometry — Astron. a photographic technique for clarifying the telescopic images of a star by taking short exposures of the electronic images of the star s speckle pattern and extrapolating properties of the starlight to create a more accurate composite… … Universalium
Dynamic speckle — Figure 1 A dynamic speckle from a maize seed that seems to “boil” faster in the areas where the scatterers are more active, in this case in the embryo and in a river like in the crack. In physics, dynamic speckle is a result of the temporal… … Wikipedia
Eye testing using speckle — Laser speckle can be employed as a method for conducting a very sensitive eye test [Ennos AE, 1996, Phys. Educ, 31, 138 142] .When a surface is illuminated by a laser beam and is viewed by an observer, a speckle pattern is formed on the retina.… … Wikipedia
Diffraction — Computer generated intensity pattern formed on a screen by diffraction from a square aperture … Wikipedia
Holography — (from the Greek, ὅλος hólos whole + γραφή grafē writing, drawing) is a technique that allows the light scattered from an object to be recorded and later reconstructed so that it appears as if the object is in the same position relative to the… … Wikipedia
