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dc.contributor.authorPei, Ting-Hangen_US
dc.contributor.authorHuang, Yang-Tungen_US
dc.contributor.authorWang, Yu-Jiuen_US
dc.contributor.authorChen, Wei-Zenen_US
dc.contributor.authorKuo, Chien-Nanen_US
dc.contributor.authorCheng, Yu-Tingen_US
dc.date.accessioned2014-12-08T15:32:44Z-
dc.date.available2014-12-08T15:32:44Z-
dc.date.issued2013en_US
dc.identifier.isbn978-0-8194-9778-9en_US
dc.identifier.issn0277-786Xen_US
dc.identifier.urihttp://hdl.handle.net/11536/22866-
dc.identifier.urihttp://dx.doi.org/10.1117/12.2035020en_US
dc.description.abstractWe develop a continuous wave terehertz (THz) imaging system operating at 288 GHz. This imaging system simply consitutes three parts including the source, two optical lenses, and the detector. The entire size is smaller than the tranditional pulsed THz imaging system. In this developed system, the THz wave is generated by a horn attenna which concentrates the wave in an azimuth angle of 3 degrees similar to 5 degrees. The source originates from a singnal generator, and then the frequency increases to 288 GHz after passing through an 8X multiplier. Next, THz wave is focused by a THz lens on the test sample. By controling the sample position in the x-z plane, we can scan it pixel-by-pixel in which each step along the x- or z- axes is 0.1 mm. After penetrating the test sample, another lens collects the transmitted THz wave and focuses them into the thermal detector. This detector can disply the collected THz power. Finally, by drawing the detected power of each pixel, a transmitted-intensity figure for all pixels is obtained. The resolution of this THz imaging system is about 1 similar to 2 mm at present. We have measured human molar tooth and obtained its transmitted figures. Besides, we also develop a technology to adjust the positions of the source and detector by a system containing one laser, one beamsplitter, and two mirrors. The relative positions between the source and detector is very important. The input of the source and the output of the detector are small so that they have to aim at each other very accurately in order to collect maximum transmitted power in the detector.en_US
dc.language.isoen_USen_US
dc.subjectTHz waveen_US
dc.subjectImaging systemen_US
dc.titleA Continuous-Wave THz Imaging Systemen_US
dc.typeProceedings Paperen_US
dc.identifier.doi10.1117/12.2035020en_US
dc.identifier.journalINTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: TERAHERTZ TECHNOLOGIES AND APPLICATIONSen_US
dc.citation.volume8909en_US
dc.contributor.department友訊交大聯合研發中心zh_TW
dc.contributor.departmentD Link NCTU Joint Res Ctren_US
dc.identifier.wosnumberWOS:000325461600044-
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