Title :
Terahertz thermal imaging of a cold object with a 4 K-cryocooled photoconductive detector
Author :
Aoki, M. ; Takeda, M. ; Hiromoto, N.
Author_Institution :
Grad. Sch. of Sci. & Technol., Shizuoka Univ., Shizuoka, Japan
Abstract :
We have demonstrated terahertz (THz) passive imaging of a cold object using a 4 K-cryocooled THz photoconductive detector with BLIP at around 1.5-2.5 THz. In our imaging system, we achieved a resolution of 240 μm, a background limited NEP of 7.7×10-15W/√Hz and a NETD of 11 mK. We have measured temperature dependence of THz intesity emitted from a sample with the emissivity of 0.99. The result shows that the THz intensity has a good linear relation to the temperature.
Keywords :
infrared imaging; photoconductive cells; temperature measurement; terahertz wave detectors; 4 K-cryocooled photoconductive detector; BLIP; NEP; NETD; THz intesity; THz passive imaging; cold object; emissivity; temperature measurement; terahertz thermal imaging system; Detectors; Imaging; Mirrors; Quantum cascade lasers; Temperature dependence; Temperature measurement; Temperature sensors;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6380270
