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Programme for Research-Development-Innovation for

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Presentation on theme: "Programme for Research-Development-Innovation for"— Presentation transcript:

1 Programme for Research-Development-Innovation for
Space Technology and Advanced Research - STAR Compressive THz Imaging and Hadamard Spectroscopy for Space Applications THz Imaging Florin Garoi Romanian Space Week , May 2014, Bucharest, Romania

2 Partners Coordinating organization Partner organization
National Institute for Laser, Plasma and Radiation Physics (INFLPR) University Politehnica of Bucharest – Research Center for Spatial Information (CEO Space Tech) 409 Atomistilor Street, PO Box MG-36, Magurele, Ilfov, Romania 1-3 Iuliu Maniu Bd, Bucharest, Romania Project manager Partner team leader Florin Garoi Daniela Coltuc INFLPR CEO Space Tech Tel/Fax: Tel: Web: Web:

3 The project Short description of the project Project goal
spectroscopy and imaging at THz wavelength range (0.1 – 30 THz); Hadamard spectroscopy Compressive sensing (CS) imaging Project goal Experimental model of Hadamard spectrometer and CS imaging system in THz domain, for Space Applications

4 * with gray are already completed activities
Work plan of the project * with gray are already completed activities Phase Activities Partner Deadline I State of the art in THz imaging and Hadamard spectroscopy State of the art in compressive sensing (CS) and Hadamard spectrocospy Compressive sensing and Hadamard spectroscopy basics Financial and Quality Management INFLPR UPB Dec 15, 2012 II Concept of THz image spectrometer and simulation of imaging and spectroscopy THz image spectrometer as and-to-and system Modeling and simulation of imaging and spectroscopy functions Reporting and dissemination June 30, 2013 III Experimental model of THz image spectrometer Design and implementation of the THz data acquisition and DMD Characterization of the components in the experimental setup Integration of the parts and testing of electrical components of the experimental setup Statistical analysis of the measured THz signals and elaboration of appropriate algorithms for CS Dec 15, 2013 IV Functions development for THz image spectrometer Definition of the CS and spectroscopy specifications Design and implementation of the CS and spectroscopy Integration of CS and spectroscopy in the experimental model Dec 15, 2014 V THz image spectrometer validation and evaluation Laboratory simulator for ESA applications of interest in THz domain Study regarding development of technical perspectives Nov 18, 2015

5 Implementation status
Characterization of the components in the experimental setup Experimental model v1.0: FIR 100 laser (Edinburgh Instruments); l = mm, mm, and 163 mm Mirrors Dispersive component: reflective blaze diffraction grating transmission diffraction grating (wire or machine cut) prism Digital Micromirror Device (DMD) Detector Software: LabView CS Laser CO2 section: 80 lines between 9.1μm and 10.9μm 50W on the strongest lines CO2 laser output is coupled into the FIR laser via two steering mirrors and a ZnSe focusing lens FIR section: 118.83mm (150mW), 133.1mm (1mW), and 163mm (36mW) Installation and training

6 Implementation status
Optical components Off-axis parabolic mirrors: f = 250mm (Laser Beam Products, UK) Lenses: f = 50mm, 100mm, 200mm (Tydex, Russia) Reflective blaze diffraction grating: Brass (CNC EUROMOD-P), coated with 50nm layer of gold (Varian RF magnetron sputtering) Dimensions: 20mm × 20mm × 5mm Grating pitch: 120 mm  not feasible 300 mm  in the making Cross-section of the blaze grating Grating cross-section Blaze wavelength as a function of the incidence angle.

7 Implementation status
Wire transmission diffraction grating: Brass frame and nickel wire Dimensions: 50mm × 50mm × 10mm Grating active area: 40mm × 40mm Wire diameter: 200mm Grating pitch: 400mm Polyethylene prisms: Prism angle: 60, 50 and 40 Wavelength as a function of diffraction angle (first diffraction order) Measured with Tera View systems, TPS Spectra 3000 Deviation d versus angle of incidence a

8 Implementation status
Digital Micromirror Device, DAQ and Detector: Projection of masks and acquisition  integrated in LabView Tested in visible range of the spectrum Testing with various random matrices generation for CS Find a sensing matrix through random methods that accurately reproduces a given image and scaling for a finer resolution with more samples or larger sensors coverage; for example Low Density Parity Check (LDPC) matrices Project start TRL 1 – Basic principles observed and reported Lowest level of technology readiness. Scientific research begins to be translated into applied research and development Present TRL 2 – Technology concept and/or application formulated Once basic principles are observed, practical applications can be invented and R&D started. Applications are speculative and may be unproven TRL 3 – Analytical and experimental critical function and/or characteristic proof-of-concept Active research and development is initiated, including analytical/laboratory studies to validate predictions regarding the technology Intended to be achieved TRL 4 – Component and/or breadboard validation in laboratory environment Basic technological components are integrated to establish that they will work together

9 Results Physical Fourier encoding of optical data
Preliminary tests of the dispersive elements, in visible and THz range Experimental setup Initial objects Decoded images

10 Results One Pixel Camera for THz Image Acquisition Design and Tests of Camera Software EXPERIMENTAL RESULTS ACQUISITION PRINCIPLE: Compressive Sensing (CS) SCOPE: finding the appropriate couple Sensing Matrix – Transform for CS Algorithm METHOD: couple evaluation by Rate-Distortion curve EXPERIMENTS: Test images (numerical): Cameraman and Lena Tested Sensing matrices: Binary Random Binary Sparse LDPC (Low Density Parity Code) Tested Transforms: Discrete Cosine Transform Wavelet Transform TV (Total Variation) Rate-Distortion curves for TV SOFTWARE: CS Toolbox at L1 Magic at FOUND SOLUTION: LDPC with TV Rate-Distortion curves for LDPC

11 Project contribution to STAR Programme
Project’s contribution to the goal of the STAR Programme (how the project contributes to the increasing of the capacity for organizations involved to participate in ESA Programmes) The project addresses Basic Technology Research Programme (TRP), one of ESA’s activities regarding technology and research → may facilitate strong and long-term relations between Romanian entities and ESA. Context and contribution to ESA Programmes (please specify how the project activities can contributes to present and future ESA programmes) We hope that our research on THz imaging with CS and Hadamard spectroscopy contribute to the development of new instruments required for the current and long-term ESA science directorate programme.

12 Dissemination Publications and Conferences
Rate-Distortion Performance of Compressive Sensing in One Pixel Camera, Mihai Petrovici, Daniela Coltuc, Mihai Datcu, and Vasile Tiberius, Submitted to IEEE Signal processing Letters  Physical Fourier encoding and compacting of optical data, Petre Catalin Logofatu, Florin Garoi, Victor Damian and Cristian Udrea, Submitted to Optical Engineering Terahertz range complex refractive index determinations for liquids using ATR, Adrian Dobroiu and Petre Catalin Logofatu, Submitted to Optical Engineering Introduction to Compressive Sampling and applications in THz Imaging, Daniela Coltuc, Invited paper to ATOM-N 2014 Conference (Constanta, August 21-24, 2014) Dispersive elements for THz domain, V. Damian, Mihaela Bojan, G. D. Chioibasu, F. Garoi, P. C. Logofatu, L. Mihai, C. Udrea, I. Urzica, T. Vasile, and C. Viespe, will be presented at INDLAS Conference (Bran , May 19-23, 2014) Synthetic aperture and scarsity analysis methods for THz imaging, Mihai-Alexandru Petrovici, will be presented at the European Conference on Computer Vision (Zurich, September 6-12, 2014) L1 minimization applied to the simple case of a sparse signal consisting in a sum of sinusoids, Petre Catalin Logofatu, will be presented at ATOM-N Conference (Constanta, August 21-24, 2014) Technical Notes within the consortium (available upon request) For up-to-date info, please visit our webpage:

13 Conclusions Conclusions
All tasks and activities completed as scheduled Most important results: Installation and training for the THz laser Simulation of the experimental setup v1.0 Characterization of some of the components Definition of the CS matrices and algorithms for data processing

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