Results 241 to 250 of about 6,952,164 (288)

Reflective Single-Pixel Terahertz Imaging Based on Compressed Sensing

IEEE Transactions on Terahertz Science and Technology, 2020
The investigation of single-pixel terahertz (THz) imaging opens up a new research direction for the development of THz imaging technology. In this work, we exploit a reflective single-pixel THz imaging system based on photoinduced dynamic masks.
Yue Lu, Xin-Ke Wang, Wen-feng Sun, Shengfei Feng, Jia-sheng Ye, Peng Han, Yan Zhang   +6 more
semanticscholar   +1 more source

Inexpensive detector for terahertz imaging

Applied Optics, 2007
Glow discharge plasma, derived from direct-current gas breakdown, is investigated in order to realize an inexpensive terahertz (THz) room-temperature detector. Preliminary results for THz radiation show that glow discharge indicator lamps as room-temperature detectors yield good responsivity and noise-equivalent power.
A, Abramovich, N S, Kopeika, D, Rozban, E, Farber   +3 more
openaire   +2 more sources

Polarization information for terahertz imaging

2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves, 2008
A method to analyze the change in the polarization state of a terahertz (THz) wave by using a typical electro-optic sampling setup with a ?110? zinc-blende crystal as a sensor is presented. To illustrate knowledge of the polarization of the THz pulse, the THz detection function in a ZnTe crystal is presented.
Ranxi, Zhang, Ye, Cui, Wenfeng, Sun, Yan, Zhang   +3 more
openaire   +2 more sources

Terahertz near-field imaging

Physics in Medicine and Biology, 2002
A near-field probe is described that enables high spatial resolution imaging with terahertz (THz) pulses. The spatial resolution capabilities of the system lie in the range of few microns and we demonstrate a resolution of 7 microm using broad-banded THz pulses with an intensity maximum near 0.5 THz.
John F, Federici, Oleg, Mitrofanov, Mark, Lee, Julia W P, Hsu, Igal, Brener, Roey, Harel, James D, Wynn, Loren N, Pfeiffer, Ken W, West   +8 more
openaire   +2 more sources

Overview of imaging methods based on terahertz time-domain spectroscopy

Applied spectroscopy reviews (Softcover ed.), 2021
Due to the unique characteristics of terahertz (THz) waves, such as low-energy, penetrating, and broadband, THz imaging has been regarded as cutting-edge technology in many fields.
Qi Wang, Lijuan Xie, Y. Ying
semanticscholar   +1 more source

Terahertz imaging: applications and perspectives

Applied Optics, 2010
Terahertz (THz) spectroscopy, and especially THz imaging, holds large potential in the field of nondestructive, contact-free testing. The ongoing advances in the development of THz systems, as well as the appearance of the first related commercial products, indicate that large-scale market introduction of THz systems is rapidly approaching.
Christian, Jansen, Steffen, Wietzke, Ole, Peters, Maik, Scheller, Nico, Vieweg, Mohammed, Salhi, Norman, Krumbholz, Christian, Jördens, Thomas, Hochrein, Martin, Koch   +9 more
openaire   +2 more sources

Application of Terahertz Spectroscopy and Imaging

Siberian Journal of Physics, 2009
We examined the feasibility of Terahertz time-domain spectroscopy (THz-TDS) using a 4-mm-thick quartz crystal to extract the angle of rotation of THz radiation polarization induced by a two-color laser in air plasma. We also used the THz-TDS technique to identify explosives and melamine in mixtures.
Cunlin Zhang, Kaijun Mu
openaire   +1 more source

A method and system for enhancing the resolution of terahertz imaging

Measurement, 2019
In this paper, a comprehensive method and process for developing Terahertz (THz) images with enhanced resolution is introduced. This method is implemented as a system comprised of various resolution and quality enhancement techniques.
Kiarash Ahi
semanticscholar   +1 more source

X-ray and terahertz imaging as non-destructive techniques for defects detection in nanocomposites foam-core sandwich panels containing carbon nanotubes

Polymer testing, 2019
In this article, we have studied the effects of carbon nanotubes on the state-of-the art non-destructive (NDT) techniques (X-ray radiography and terahertz imaging methods) for the inspection of defects in the polymeric foam-core sandwich panels.
I. Taraghi, P. Lopato, S. Paszkiewicz, E. Piesowicz   +3 more
semanticscholar   +1 more source

Passive terahertz imager

2011 International Conference on Infrared, Millimeter, and Terahertz Waves, 2011
The near filed terahertz wave imaging technology has been applied in security screening for detecting objects concealed under clothes. This paper describes two terahertz wave imaging system that acquires the body image by opto-mechanical scanner. One system is worked at reflective mode. Another system is worked at transitive mode.
Cunlin Zhang, Chao Deng
openaire   +1 more source