Title :
Spatial frequency filter for real-time THz imaging
Author :
Hattori, T. ; Sakamoto, M. ; Rungsawang, R.
Author_Institution :
Inst. of Appl. Phys., Tsukuba Univ., Japan
Abstract :
In real-time THz imaging using intense broadband THz pulses, low-frequency THz components degrade the contrast and resolution of the THz images. We improved the contrast by spatially filtering out low-frequency components using the frequency dependence of the beam waist size of a focused THz beam.
Keywords :
high-pass filters; optical collimators; spatial filters; submillimetre wave filters; submillimetre wave imaging; beam waist size; focused THz beams; frequency dependence; low-frequency submillimetre wave components; real-time THz imaging; spatial frequency filters; Aluminum; Electrodes; Filtering; Focusing; Frequency; Mirrors; Optical imaging; Optical pulses; Spatial filters; Spatial resolution;
Conference_Titel :
Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on
Print_ISBN :
0-7803-9348-1
DOI :
10.1109/ICIMW.2005.1572548
