The Interferometer

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Mary C


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February 11, 2015








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They are then superimposed on to a screen. The screen will display an interference pattern of fringes. The interferometer is extremely sensitive to vibrations and should be isolated from them The interferometer is the most accurate device presently known to man, and most likely will remain the most accurate measuring device for the next hundred years" Cal Christiansen...
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The interferometer can measure lengths of one half the wavelength of the light source being used. With a HeNe laser (Helium Neon) this length is 316.4nm, about 1/3 of a micron. The interferometer is able to measure very small distances by the interference produced between two lasers beams. With this degree of accuracy there are clearly many uses for this device including, measuring flatness, structural stress, and making linear measurements...
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