標題: A Continuous-Wave THz Imaging System
作者: Pei, Ting-Hang
Huang, Yang-Tung
Wang, Yu-Jiu
Chen, Wei-Zen
Kuo, Chien-Nan
Cheng, Yu-Ting
友訊交大聯合研發中心
D Link NCTU Joint Res Ctr
關鍵字: THz wave;Imaging system
公開日期: 2013
摘要: We 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.
URI: http://hdl.handle.net/11536/22866
http://dx.doi.org/10.1117/12.2035020
ISBN: 978-0-8194-9778-9
ISSN: 0277-786X
DOI: 10.1117/12.2035020
期刊: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: TERAHERTZ TECHNOLOGIES AND APPLICATIONS
Volume: 8909
顯示於類別:會議論文


文件中的檔案:

  1. 000325461600044.pdf

若為 zip 檔案,請下載檔案解壓縮後,用瀏覽器開啟資料夾中的 index.html 瀏覽全文。