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''Terahertz nondestructive evaluation'' pertains to devices, and techniques of analysis occurring in the terahertz domain of electromagnetic radiation. These devices and techniques evaluate the properties of a material, component or system without causing damage.〔 ==Terahertz imaging== Terahertz imaging is an emerging and significant nondestructive evaluation (NDE) technique used for dielectric (nonconducting, i.e., an insulator) materials analysis and quality control in the pharmaceutical, biomedical, security, materials characterization, and aerospace industries.〔 〕 It has proved to be effective in the inspection of layers in paints and coatings,〔 〕 detecting structural defects in ceramic and composite materials〔 〕 and imaging the physical structure of paintings〔 〕 and manuscripts. 〔 〕〔 (【引用サイトリンク】url=http://www.teraview.com/applications/nondestructive-testing/art.html ) 〕 The use of THz waves for non-destructive evaluation enables inspection of multi-layered structures and can identify abnormalities from foreign material inclusions, disbond and delamination, mechanical impact damage, heat damage, and water or hydraulic fluid ingression. 〔 〕 This new method can play a significant role in a number of industries for materials characterization applications where precision thickness mapping (to assure product dimensional tolerances within product and from product-to-product) and density mapping (to assure product quality within product and from product-to-product) are required.〔 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「Terahertz nondestructive evaluation」の詳細全文を読む スポンサード リンク
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