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Line-focused THz time-domain spectroscopic imaging ofmoving objectvòuňôtqň¯vèňę×Atsushi Ihara, Ken-ichi Sawanaka, Takeshi Yasui, and Tsutomu Araki«ĺ«®«®ļ¦ą·®ĄĊĈGraduate School of Engineering Science, Osaka University
E-mail: t-yasui@me.es.osaka-u.ac.jp,
http://sml.me.es.osaka-u.ac.jp/
We propose a line-focused THz time-domain spectroscopic (THz-TDS) imaging system for THz
spectroscopic imaging of a moving object by combination of electro-optical time-to-space conversion
and real-time 1D imaging of a THz beam passing through a sample. We applied the proposed system
for a moving object, and achieved the pixel rate of 2,320 pixel/sec. The proposed method will be apowerful tool in the fields of security monitoring and nondestructive testing.
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Experimental setup.
ä,¶ĸ ;:qÐCMOS DJMÀªñ¬f+JT3R0n¼vÔ &kÊ THz PR5(¼  THz @TI(1RDOÑëg'( THz PR5E) ZnTe2 Ïe&#%1RDOñ¬f THz +JT3( CMOS .JMÀªé& CMOS .JM 1kHz PT2T?O4{¤$PT2
TÒ%à|² 1/2 m|ï500Hzð{¤g8L9?T( THz ¾»¼GRDg¼ &#%THz ?O4 ZnTe2 hzïbx+JT3ðh  zïÓ +JT3ðDQTCg+JT3(y?O4®äÐtm+JT3( CMOS .JMjËl&#%îã?O4SQ9/+RS+JT3R0ïBPTIPT; 500fpsð(º & ¢Î¿ò¬f
Éê THz +JT3êßï°ªð(îãBTN,&#% THz mgM+R+JT3(&  1RDOTHz B-;=9/Ï¡ 1  &J7OFTO)P+ïMHAð(¼  MHA É ¹(ÛÌ&#%áå|² èvÔ THz >R<?4B*O7Tn¼&Y }   É ê ¿  ½  & á å ¸  ( £  & 4 m o MHA ô SUS304 ó á å | ² =0.2THz,0.4THz,0.8THz,1.5THzó 2õ(`'(KT7íq«¨4:T3äÐ¿Æq$´(ÖïñM+R´ê=100 HNÅi+JT3´ê=10 Åð  3 t' THz
mg+JT3ï232pixel*100lineð(Ã %y|²®½&+JT3 ÂÚ& 0.18THz r 1.53THz  4 mo MHA Z©â%+JT3 $' & 0.39THz  0.2THz-MHA0.78THz " 0.2THz-MHA r 0.4THz-MHA
+JT3/Q4;T/ ´' & 'MHA
áå|²]|²dm(¶³×&Uî|²dm(Õáå&áå4E/;O¸(!& Y}Ñëgê THz-TDS +JT3R0A/6OPT;¦ï·Ø´ THz-TDS +JT3R0ð 100Fig. 2. Sample (4-segment MHA)
c\V &®Å 2320 A/6Oæ &Fig. 3. THz-TDS image of 4-segment MHA  ì¯g¿ê-ÉêÑëg THz ÏegÍ(¼ Ñëg  +JT3R0±(q_1RDOç¼£¼(Ùa Ï§¦±(V}&A/6OPT;(ævÔ(ÂÚ ¥ÁÈÄÁÞ 18686008S18650121 r ^sÝ~#%p(u[1] Yasuda et al: Opt. Comm. 267 (2006) 76.
[2] X­w[, Optics Japan 2005 ÜµWÇë, 23aP11, pp. 110-111 (2005).
[3] F. Miyamaru et al: Jpn. J. Appl. Phys., vol. 43, pp.L489-L491(2004).
[4] X­w[, Optics & Photonics Japan 2006 ÜµWÇë,9pP30, pp. 356-357 (2006).