Distinguishing between materials in terahertz imaging using wide-band cross ambiguity functions

Handley, James W.; Fitzgerald, Anthony J.; Berry, E.; Boyle, R.D.

doi:10.1016/j.dsp.2003.12.004

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2008

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“…The window function has fixed time and frequency resolution, however, which is still a shortcoming. Wavelet transforms are an alternative method [46,47] but have not been explored here. If the sample has a thin layered structure, in a region of the image we can use higherfrequency components to find and highlight it.…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional imaging of optically opaque materials using nonionizing terahertz radiation

Wallace¹,

Pickwell‐MacPherson²,

Zeitler³

et al. 2008

J. Opt. Soc. Am. A

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Terahertz electromagnetic radiation has already been shown to have a wide number of uses. We consider specific applications of terahertz time-domain imaging that are inherently three-dimensional. This paper highlights the ability of terahertz radiation to reveal subsurface information as we exploit the fact that the radiation can penetrate optically opaque materials such as clothing, cardboard, plastics, and to some extent biological tissue. Using interactive science publishing tools, we concentrate on full three-dimensional terahertz data from three specific areas of application, namely, security, pharmaceutical, and biomedical.

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Section: Discussionmentioning

confidence: 99%