Real-time transmission-type terahertz microscope with palm size terahertz camera and compact quantum cascade laser
Author(s)Oda, Naoki; Ishi, Tsutomu; Morimoto, Takao; Sudou, Takayuki; Tabata, Hitoshi; Kawabe, Shunsuke; Fukuda, Kyohei; Lee, Alan; Hu, Qing; ... Show more Show less
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This paper describes a real-time transmission-type Terahertz (THz) microscope, with palm-size THz camera and compact quantum cascade laser (QCL). The THz camera contains 320x240 microbolometer focal plane array which operates at 30 Hz frame rate and has lock-in imaging function as well as integration functions such as frame integration and spatial filter. These functions are found very powerful in improving signal-to-noise ratio. QCL is installed in compact Stirling cycle cooler. A variety of QCLs covers frequency range from 1.5 to 5 THz and provides time-average power of 0.5~2 mW. The illumination area for sample is changed by adjusting one lens in the illumination optics. Performances of the THz microscope, such as signal-to-noise ratio and so on, were measured and are found consistent with the calculations. THz images taken with the THz microscope are finally presented.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Proceedings of SPIE--the International Society for Optical Engineering
Oda, Naoki, Tsutomu Ishi, Takao Morimoto, Takayuki Sudou, Hitoshi Tabata, Shunsuke Kawabe, Kyohei Fukuda, Alan W. M. Lee, and Qing Hu. “Real-Time Transmission-Type Terahertz Microscope with Palm Size Terahertz Camera and Compact Quantum Cascade Laser.” Edited by Manijeh Razeghi, Alexei N. Baranov, Henry O. Everitt, John M. Zavada, and Tariq Manzur. Terahertz Emitters, Receivers, and Applications III (October 15, 2012) (Proceedings of SPIE; volume 8496). © (2012) SPIE.
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