scholarly journals Time-domain imaging system in the terahertz range for immovable cultural heritage materials

Strain ◽  
2018 ◽  
Vol 55 (2) ◽  
pp. e12292
Author(s):  
David Giovannacci ◽  
Hoi Ching Cheung ◽  
Gillian C. Walker ◽  
John W. Bowen ◽  
Dominique Martos-Levif ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Time Domain ◽  
Imaging System ◽  
Terahertz Range

Advanced Non-Destructive Fault Isolation Techniques for PCB Substrates Using Magnetic Current Imaging and Terahertz Time Domain Reflectometry

2018 ◽  
Author(s):  
Daechul Choi ◽  
Yoonseong Kim ◽  
Jongyun Kim ◽  
Han Kim
Keyword(s):  
Time Domain ◽  
Quantum Interference ◽  
Flip Chip ◽  
Imaging System ◽  
Time Domain Reflectometry ◽  
Fault Isolation ◽  
Magnetic Current ◽  
Isolation Techniques ◽  
Super Conducting ◽  
Non Destructive

Abstract In this paper, we demonstrate cases for actual short and open failures in FCB (Flip Chip Bonding) substrates by using novel non-destructive techniques, known as SSM (Scanning Super-conducting Quantum Interference Device Microscopy) and Terahertz TDR (Time Domain Reflectometry) which is able to pinpoint failure locations. In addition, the defect location and accuracy is verified by a NIR (Near Infra-red) imaging system which is also one of the commonly used non-destructive failure analysis tools, and good agreement was made.

scholarly journals A New Acquisition and Imaging System for Environmental Measurements: An Experience on the Italian Cultural Heritage

Sensors ◽  
2014 ◽  
Vol 14 (5) ◽  
pp. 9290-9312 ◽  
Author(s):  
Fabio Leccese ◽  
Marco Cagnetti ◽  
Andrea Calogero ◽  
Daniele Trinca ◽  
Stefano Pasquale ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Imaging System

Research of Landmine Detection Using Terahertz Technology

2014 ◽  
Vol 644-650 ◽  
pp. 1313-1316 ◽  
Author(s):  
Qing Miao ◽  
Gao Wang ◽  
Yang Jun Li
Keyword(s):  
Time Domain ◽  
Major Part ◽  
Terahertz Wave ◽  
Landmine Detection ◽  
Terahertz Range ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy ◽  
Characteristic Spectrum ◽  
Terahertz Technology

The detection of landmines has become a hard task to deal with because of the diversity of landmines and the complexity of minefield. The development of terahertz technologies has provided a feasible way to detect the buried landmines. Landmines’ shell is usually made of ceramics, plastics, even wood and so on, which terahertz wave could penetrate them easily. The explosives are the major part of landmines. Many types of explosives have the characteristic spectrum in terahertz range, so it would be an effective method to detect landmines by measuring the spectrum of explosives with terahertz time-domain spectroscopy.

Full-field time domain optical molecular imaging system

2005 ◽  
Author(s):  
David J. Hall ◽  
David R. Vera ◽  
Robert F. Mattrey
Keyword(s):  
Molecular Imaging ◽  
Time Domain ◽  
Imaging System ◽  
Optical Molecular Imaging ◽  
Full Field

The Computational Study of Microwave-Induced Thermo-Acoustic Tomography for Biologic Tissue Imaging Based on Pseudo-Spectrum Time Domain and Time Reversal Mirror Technique

2012 ◽  
Vol 195-196 ◽  
pp. 353-359 ◽  
Author(s):  
Guo Ping Chen ◽  
Zhi Qin Zhao ◽  
Qing H. Liu
Keyword(s):  
Time Domain ◽  
Time Reversal ◽  
Random Media ◽  
Imaging System ◽  
Malignant Tumors ◽  
Computational Study ◽  
Initial Pressure ◽  
Acoustic Tomography ◽  
Model Parameters ◽  
Time Reversal Mirror

Microwave-Induced Thermo-Acoustic Tomography (MITAT) own much concerns in recent years in biomedical imaging field. High contrast and resolution compared with conventional microwave or ultrasound imaging system especially for malignant tumors are outstanding characters of it. In this paper, the induced thermo-acoustic wave propagating in a mimic biologic tissue is simulated by numeric method Pseudo-Spectrum Time Domain (PSTD). Due to the excellent performance in noise-depress and the stability for the fluctuation of the model parameters, Time Reversal Mirror (TRM) imaging technique is studied computationally for the simulative received thermo-acoustic signals. Some thermo-acoustic objects with different initial pressure distribution are designed and imaged by TRM technique to represent the complex biologic tissue case in a random media. The quality of images generated by TRM technique based on PSTD method hints the potential of the MITAT technique.

STANDOFF SENSING AND IMAGING OF EXPLOSIVE RELATED CHEMICAL AND BIO-CHEMICAL MATERIALS USING THz-TDS

2007 ◽  
Vol 17 (02) ◽  
pp. 239-249 ◽  
Author(s):  
Hua Zhong ◽  
Albert Redo-Sanchez ◽  
Xi-Cheng Zhang
Keyword(s):  
Remote Sensing ◽  
Glutamic Acid ◽  
Time Domain ◽  
Large Scale ◽  
Imaging System ◽  
Terahertz Time Domain Spectroscopy ◽  
Multiple Absorption ◽  
Thz Absorption ◽  
Absorption Features ◽  
Chemical Materials

We report the sensing and imaging of explosive related chemical and bio-chemical materials by using terahertz time domain spectroscopy (THz-TDS) at standoff distance. The 0.82 THz absorption peak of RDX is observed at a distance up to 30 m away from the emitter and receiver. Multiple absorption features of RDX, 2,4-DNT and Glutamic Acid are identified by using a large scale 2-D imaging system. These results support the feasibility of using THz-TDS technique in remote sensing and detection of chemical materials.

Investigation of stimulus signals for a time domain microwave imaging system

2017 ◽  
Vol 11 (11) ◽  
pp. 1636-1643 ◽  
Author(s):  
Xuezhi Zeng ◽  
Albert Monteith ◽  
Andreas Fhager ◽  
Mikael Persson ◽  
Herbert Zirath
Keyword(s):  
Time Domain ◽  
Imaging System ◽  
Microwave Imaging

A non-contact time-domain scanning brain imaging system: first in-vivo results

2013 ◽  
Author(s):  
M. Mazurenka ◽  
L. Di Sieno ◽  
G. Boso ◽  
D. Contini ◽  
A. Pifferi ◽  
...  
Keyword(s):  
Brain Imaging ◽  
Time Domain ◽  
Contact Time ◽  
Imaging System

scholarly journals Characterizing the Layer Structures of the Lacquerware From the Palace Museum by Terahertz Imaging in Reflection Geometry

2021 ◽  
Vol 9 ◽  
Author(s):  
Hongfei Zhang ◽  
Yuanmeng Zhao ◽  
Chenyu Li ◽  
Cunlin Zhang
Keyword(s):  
Time Domain ◽  
Imaging System ◽  
Structural Information ◽  
Three Dimensional ◽  
Terahertz Imaging ◽  
Universal Method ◽  
Wood Panel ◽  
Non Invasive ◽  
Reflection Geometry ◽  
Buried Layers

Chinese lacquerware is an important invention of arts and crafts in China. In this study, Chinese lacquerware is characterized using terahertz reflectometric imaging. The lacquerware studied herein comprises an ornamental wood panel covered by multiple layers of lacquers to portray motifs. For characterizing lacquerware, a terahertz time-domain spectroscopic reflectometric imaging system is proposed. The role of the proposed terahertz imaging system in highlighting the interface between layers during stratigraphic buildup in reflection geometry is proved. The proposed system provides a universal method for assessing the structural information of lacquered objects in a contactless and non-invasive manner; moreover, it provides two-dimensional images, subsurface three-dimensional images, and stratigraphic images (b-scans) in a contactless and non-invasive manner. Using the proposed system, we examine the buried layers of the lacquerware, including faults in the wooden layer and damages in the lacquerware. Research shows the promising prospects of terahertz time-domain spectroscopic reflectometric imaging as a non-destructive detection technique suited to lacquerware.

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