Compressed terahertz imaging system using a spin disk - University of ...
Recommend Documents
The system proposed here actively compensates for these fluctuations on two levels. R. Zannoni, K. S. Yngvesson, F. Rodriguez-Morales, J. Nicholson, and.
The imager is based on a phonon-cooled quasi-optically coupled hot electron bolometric (HEB) mixer integrated with an InP MMIC IF low-noise amplifier (LNA).
May 9, 2012 - Terahertz single pixel imaging based on a Nipkow disk. Yong Ma, James Grant, Shimul Saha and David Cumming*. School of Engineering ...
1.5 THz laser radiation, a 10m standoff distance, 1 m x. 1m target area, and a 1cm x 1cm pixel resolution, a viable imaging system should be achievable. Perform ...
Jun 8, 2005 - TeraView Limited, Platinum Building, St John's Innovation Park, Cambridge ..... [4] Dorney T D, Baraniuk R G and Mittleman D M 2001 J. Opt.
Mar 18, 2010 - I would like to thank Dr. Jeff Jackson for providing with his time and expertise in digital image processing. I would like to thank my colleagues, ...
K. W. Hollman, K. W. Rigby, and M. O'Donnell, âCoherence factor of speckle from a multi-row probe,â in. Proceedings of the 1999 IEEE Ultrasonics Symposium ...
Ivonne Escorcia Carranza, James Grant, and David R.S. Cumming. Microsystems Technology Group, School of Engineering, University of Glasgow, G12 8LT, ...
Sep 26, 2017 - Langford, M.L.; Limiti, E.; et al. ... Rappaport, C.; Gonzalez-Valdes, B.; Allan, G.; Martinez-Lorenzo, J. Optimizing Element Positioning in Sparse.
Feb 10, 2005 - 1-kHz Real-Time Imaging Using a Half-Cycle Terahertz Electromagnetic Pulse .... exposure time of the CCD camera was set to be 0.5ms so.
Nov 7, 2008 - relatively cheap commercial cryocooler. Our HTS YBCO step-edge junction technology [15, 16] is well placed to make such a detector as its ...
Nova (IST-511415). N. C. J. van der Valk's e-mail ad- dress is [email protected]. References. 1. B. B. Hu and M. C. Nuss, Opt. Lett. 20, 807 (1995).
antenna, one can obtain intense THz pulses having a large beam area, and simultaneous detection of two-dimensional distribution of the THz field can be ...
Experimental Pathology Laboratory, London Research Institute, Lincoln's Inn Fields Laboratories, 44 Lincoln's Inn. Fields, London WC2A 3PX and Department ...
Jan 16, 2014 - Sajan Goud Lingala; Yasir Mohsin; John D Newell; Jessica C Sieren; Daniel Thedens; Peter Kollasch; Mathews Jacob. Open Access Workshop ...
Oct 6, 2003 - Abstract: The absence of non-destructive inspection techniques for illicit drugs hidden in mail envelopes has resulted in such drugs being ...
design and mechanical design issues will be discussed. Data will be presented from sea trials performed in 1996, when the .... H. Worthington, "Some sources of.
Oct 15, 2014 - Terahertz Spectroscopy of Femtosecond Spin Dynamics in Orthoferrites. Authors; Authors and affiliations. R. V. MikhaylovskiyEmail author ...
As a monolayer CrI3 film between two hBN flakes was determined to be 0.7 nm, this flake contains regions with four different thicknesses, including. 1.4 nm (2L) ...
A. J. L. Adam, J. M. Brok, P. C. M. Planken, M. A. Seo, and D. S. Kim, âTHz near-field measurements of metal structures .... evaluated the system performance. .... To obtain such a high spatial resolution, we must pay attention to THz divergence.
INTRODUCTION. There has been considerable recent interest in the applications of the terahertz (THz) radiation. Such radiation softly interacts with biological ...
Maxim Nazarov and Alexander Shkurinov. Moscow State ...... [25] V.I. Fedorov and S.S. Popova, âLow THz range and reaction of biological object of different.
gain trans-impedance amplifier (DLPCA-200, FEMTO) and a lock-in amplifier (SRS830,. Stanford Research Systems) are used for high dynamic range.
Jul 12, 2007 - conventional 3.5 floppy disk, a sample which consists of a series of smooth ..... To recover an image, a conventional inversion procedure such.
Compressed terahertz imaging system using a spin disk - University of ...
imaging system, a motorized rotary stage is used. This enables the measurement to be done automatically and continuously, ideal for real-time terahertz ...
Compressed terahertz imaging system using a spin disk a
H. Shena, N. Newmana, L. Ganb, S. C. Zhonga, Y. Huanga and Y. C. Shena* Dept of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UK b Electronic and Computer Engineering, Brunel University, Uxbridge UB8 3PH, UK
Abstract— We report the development of a terahertz imaging system based on the concept of compressive sensing. A spin disk with random patterns was used to modulate the terahertz beam, and terahertz image was subsequently reconstructed from the measured terahertz signals. We present experimental results obtained using both a BWO source at 0.14 THz and a thermal light source (blackbody radiation) covering both infrared and visible range.
I. INTRODUCTION AND BACKGROUND
T
ERAHERTZ time-domain (pulsed) imaging has found applications in areas such as medical diagnosis of human tissue, detection and chemical mapping of illicit drugs and explosives, and pharmaceutical tablet inspection. However, most existing terahertz imaging systems remain too slow for real-time applications due to their pixel-by-pixel raster scans.
Recently Chan et al. [1] and Shen et al. [2] reported fast terahertz sensing systems through a single-pixel detector. Suppose that we want to get an I r × I c image with N = I r I c pixels in total and let x represent the vector version of the image. The imaging process in the single-pixel camera [1, 2] can be modeled through the following linear transform y = Φx where y represents an n×1 measured terahertz signal (n
