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Common path interferometer : ウィキペディア英語版 | Common path interferometer A common path interferometer is class of interferometer in which the reference beam and sample beams travel along the same path. Examples include the Sagnac interferometer, the point diffraction interferometer, and the Zernike phase contrast interferometer. A common path interferometer is generally more resilient to environmental vibrations than a "double path interferometer" such as the Michelson interferometer or the Mach-Zehnder interferometer. Although travelling along the same path, the reference and sample beams may travel along opposite directions, or they may travel along the same direction but with the same or different polarization. Double path interferometers are highly sensitive to phase shifts or length changes between the reference and sample arms. Because of this, double path interferometers have found wide use in science and industry for the measurement of small displacements, refractive index changes, surface irregularities and the like. There are applications, however, in which sensitivity to relative displacement or refractive index differences between reference and sample paths is not desirable; alternatively, one may be interested in the measurement of some other property. ==Selected examples==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Common path interferometer」の詳細全文を読む
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