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interferometer
(redirected from interferometry)

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interferometer
1. Instrument designed to measure the wavelength of light, the refractive index of a medium, as well as the flatness, thickness, the quality of optical surfaces, etc. The interferometer is based on the phenomenon of interference between two coherent beams of light. 2. Name given to several types of clinical maxwellian view system used to measure visual acuity. See clinical maxwellian view system.


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The technique used, called very long baseline interferometry (VLBI), has been used for decades for both astronomical and geodetic research.
Part II explains fundamental principles and techniques for metrology, in chapters on areas including propagation of light, interferometry, holography, speckle methods, and Moire metrology.
Radio interferometry (and image synthesis) became a standard tool over 40 years ago, but it is only recently that visible light stellar interferometry has, with Michelson type interferometers, reached the same status, with very sophisticated equipment added to large telescopes.
 
 
 
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