Passive imaging and emissivity measurement with a 4K-cryocooled terahertz photoconductive detector

IEICE Electronics Express

Makoto Aoki²  Saroj R. Tripathi¹  Masanori Takeda²  Norihisa Hiromoto² 

[1] Graduate School of Science and Technology, Shizuoka University

关键词: terahertz;    passive imaging;    sensing;    emissivity;    detector;   

DOI  :  10.1587/elex.9.333

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(11)Cited-By(3)We have demonstrated terahertz (THz) passive imaging of room-temperature objects using a 4K-cryocooled THz photoconductive detector with background limited infrared performance (BLIP) at around 1.5-2.5THz. Images of a safety razor blade and a coin concealed in a plastic package or an envelope are successfully obtained with spatial resolutions of wavelength order using the THz passive imaging system. We have compared the measured THz intensity of several materials with emissivities calculated using the reported optical constants. The result shows that the THz intensity has a good linear relation to the emissivity, which means THz emissivity of an unknown material can be estimated at a room-temperature with the THz passive imaging system.

【 授权许可】

Unknown