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Reflectometry is a noninvasive technique that allows the analysis of properties of a medium. This technique is based on the reflection of waves at the interface of interest. Waves propagate into a medium (according to the laws of propagation into the medium studied) and when they encounter a discontinuity (impedance break), part of their energy is reflected back to injection point. The analysis of the reflected signal can infer information about the system or the medium under consideration. == Application fields == The fields of application are very diverse and involve many sectors: * Radar: Reflectometry has been used extensively in radar systems for measuring distance between aircraft and the target or to detect the presence of another aircraft. * Diagnostic cables: Reflectometry is a commonly used method for determination of properties of the cables. In particular, it allows the detection, localization and characterization of electrical defects, * Characterization of the rheological properties:〔 〕 The rheological properties are determined by deformation under the effect of force applied to the material. Rheology allows to determine parameters such as viscosity, viscoelasticity or determine the thixotropic nature, shear thinning or shear thickening. * Characterization of Semiconductor and Dielectric Thin Films: Analysis of reflectance data utilizing the Forouhi Bloomer dispersion equations can determine the thickness, refractive index, and extinction coefficient of thin films utilized in the semiconductor industry. * Monitoring of cells adhesion or cell cultures, * Nondestructive testing (NDT):〔 〕 The nondestructive inspection technique are widely used in industry to reliably detect the presence of various anomalies in materials as corrosion evaluation or inspection of composite materials, * Medical imaging: The most known techniques are probably medical ultrasonography or magnetic resonance imaging (MRI). 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「reflectometry」の詳細全文を読む スポンサード リンク
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