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Terahertz 3D Spectroscopy Boosts Imaging Applications

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Terahertz imaging is gaining interest as a method for noncontact thickness and integrity measurements of high-value coatings. Some of the greatest interest is in the pharmaceutical and automotive industries.

THOMAS R. JULIANO JR. AND PHILIP F. TADAY, TERAVIEW LTD

Terahertz imaging is a promising technique for noncontact, noninvasive, nonionizing 3D spectroscopy. Terahertz rays, located between microwave and IR on the electromagnetic spectrum from approximately 0.06 THz (60 GHz) to 10 THz, are capable of penetrating nonconducting materials and revealing information from within samples. Measurements use the time-domain profile information from a terahertz pulse to produce the 3D images. At each surface (interface) within a sample, a terahertz pulse is partially reflected. Because terahertz pulsed imaging (TPI) is a time-of-flight technique, the...Read full article

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