| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1539450 | Optics Communications | 2009 | 4 Pages |
Abstract
Far infrared transmission spectra of several graphite pencil leads on paper have been measured up to 2 THz using time-domain spectroscopy. The observation of the gradual absorption depending on the graphite proportion has been assessed for different pencils from hard to soft black-marking graphite leads. The resulting graphite transmittance is used to perform two-dimensional transmission terahertz imaging of written documents.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
E. Abraham, A. Younus, A. El Fatimy, J.C. Delagnes, E. Nguéma, P. Mounaix,