Dr. Adrian Dobroiu Profile

Dr. Adrian Dobroiu

Assistant at Institute of Science Tokyo

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 6 September 2019 Presentation + Paper

Terahertz-wave radars based on resonant-tunneling-diode oscillators

Adrian Dobroiu, Safumi Suzuki, Masahiro Asada

Proceedings Volume 11124, 111240U (2019) https://doi.org/10.1117/12.2526709

KEYWORDS: Radar, Distance measurement, Phase measurement, Modulation, Oscillators, Ranging, Calibration, Terahertz radiation

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Proceedings Article | 12 February 2016 Paper

Sub-THz photonic frequency conversion using optoelectronic transistors for future fully coherent access network systems

Taiichi Otsuji, Kenta Sugawara, Gen Tamamushi, Adrian Dobroiu, Tetsuya Suemitsu, Victor Ryzhii, Katsumi Iwatsuki, Shigeru Kuwano, Jun-ichi Kani, Jun Terada

Proceedings Volume 9772, 977204 (2016) https://doi.org/10.1117/12.2209211

KEYWORDS: Field effect transistors, Transistors, Ions, Graphene, Neodymium, Optoelectronics, Head, Fourier transforms, Resistance, Frequency conversion

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Proceedings Article | 20 February 2015 Paper

Terahertz range complex refractive index determinations for liquids using ATR

Adrian Dobroiu, Petre Logofătu

Proceedings Volume 9258, 925818 (2015) https://doi.org/10.1117/12.2072174

KEYWORDS: Prisms, Liquids, Refractive index, Terahertz radiation, Interfaces, Silicon, Optical properties, Sensors, Explosives, Mirrors

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Proceedings Article | 20 October 2010 Paper

THz imaging with low-cost 130 nm CMOS transistors

Franz Schuster, Maciej Sakowicz, Alexandre Siligaris, Laurent Dussopt, Hadley Videlier, Dominique Coquillat, Frédéric Teppe, Benoît Giffard, Adrien Dobroiu, Thomas Skotnicki, Wojciech Knap

Proceedings Volume 7837, 783704 (2010) https://doi.org/10.1117/12.864877

KEYWORDS: Terahertz radiation, Sensors, Field effect transistors, Antennas, Transistors, CMOS sensors, Raster graphics, Staring arrays, CMOS technology, Silicon

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Proceedings Article | 16 January 2006 Paper

THz imaging applications

Adrian Dobroiu, Kodo Kawase, Yuichi Ogawa, Masatsugu Yamashita, Chiko Otani

Proceedings Volume 6038, 60380K (2006) https://doi.org/10.1117/12.651350

KEYWORDS: Terahertz radiation, Scattering, Sensors, Absorption, Nonlinear crystals, Photon polarization, Polaritons, Mirrors, Imaging spectroscopy, Oscillators

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SPIE Journal Paper | 1 January 2005

Terahertz technique for detection of microleaks in the seal of flexible plastic packages

Yasuyuki Morita, Adrian Dobroiu, Kodo Kawase, Chiko Otani

OE, Vol. 44, Issue 01, 019001, (January 2005) https://doi.org/10.1117/12.10.1117/1.1827222

KEYWORDS: Terahertz radiation, Inspection, Opacity, Millimeter wave sensors, Signal detection, Optical inspection, Absorption, Mirrors, Tungsten, Microscopes

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Proceedings Article | 21 October 2004 Paper

Statistical errors on Newton fringe pattern digital processing

Victor Nascov, Adrian Dobroiu, Dan Apostol, Victor Damian

Proceedings Volume 5581, (2004) https://doi.org/10.1117/12.583080

KEYWORDS: Fringe analysis, Error analysis, Statistical analysis, Computer simulations, Modulation, Software, Digital signal processing, Chromium, Calculus, Digital recording

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Proceedings Article | 30 September 2003 Paper

Statistical processing of elementary fringe patterns

Victor Nascov, Adrian Dobroiu, Dan Apostol, Victor Damian

Proceedings Volume 5227, (2003) https://doi.org/10.1117/12.519639

KEYWORDS: Fringe analysis, Error analysis, Computer simulations, Statistical analysis, Chromium, Modulation, Charge-coupled devices, Software, Quantization, Digital recording

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Proceedings Article | 30 May 2003 Paper

Statistical processing of straight equispaced fringe patterns using the discrete Fourier analysis

Victor Nascov, Adrian Dobroiu, Dan Apostol, Victor Damian

Proceedings Volume 5144, (2003) https://doi.org/10.1117/12.500559

KEYWORDS: Fringe analysis, Fourier transforms, Statistical analysis, Error analysis, Software, Digital recording, Numerical analysis, Mathematics, Charge-coupled devices, Computer simulations

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Proceedings Article | 29 June 2001 Paper

Automatic digital processing of Newton's rings fringe patterns

Victor Nascov, Adrian Dobroiu, Dan Apostol, Victor Damian

Proceedings Volume 4430, (2001) https://doi.org/10.1117/12.432814

KEYWORDS: Spherical lenses, Fringe analysis, Image processing, Digital signal processing, Wavefronts, Error analysis, Optical testing, Monochromatic aberrations, Glasses, Beam splitters

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Proceedings Article | 29 June 2001 Paper

Experimental evidence of the phase behavior at the waist of a gaussian laser beam

Adrian Dobroiu, Victor Nascov, Dan Apostol, Victor Damian

Proceedings Volume 4430, (2001) https://doi.org/10.1117/12.432811

KEYWORDS: Gaussian beams, Phase measurement, Phase shifts, Fourier transforms, Wavefronts, Beam splitters, Image processing, Visible radiation, Refractive index, Laser stabilization

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SPIE Journal Paper | 1 December 2000

Centering and profiling algorithm for processing Newton's rings fringe patterns

Adrian Dobroiu, Adrian Alexandrescu, Dan Apostol, Victor Nascov, Victor Damian

OE, Vol. 39, Issue 12, (December 2000) https://doi.org/10.1117/12.10.1117/1.1327836

KEYWORDS: Fourier transforms, Fringe analysis, Profiling, Spherical lenses, Wavefronts, Optical engineering, Laser processing, Plasma physics, Plasma, Physics

Proceedings Article | 23 February 2000 Paper

Digital speckle-interferometry camera for nondestructive testing

Dan Apostol, Victor Damian, Adrian Dobroiu, Victor Nascov

Proceedings Volume 4068, (2000) https://doi.org/10.1117/12.378746

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Proceedings Article | 23 February 2000 Paper

Improved method for processing Newton's rings fringe patterns

Adrian Dobroiu, Adrian Alexandrescu, Dan Apostol, Victor Nascov, Victor Damian

Proceedings Volume 4068, (2000) https://doi.org/10.1117/12.378693

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Proceedings Article | 23 February 2000 Paper

1D algorithm for automatic fringe spacing measurement in a straight equispaced parallel fringe pattern

Victor Nascov, Adrian Dobroiu, Dan Apostol, Victor Damian

Proceedings Volume 4068, (2000) https://doi.org/10.1117/12.378684

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Proceedings Article | 2 July 1998 Paper

Circularity measurement by laser triangulation

Victor Damian, Constantin Blanaru, Dan Apostol, Adrian Dobroiu, Victor Nascov

Proceedings Volume 3405, (1998) https://doi.org/10.1117/12.312721

KEYWORDS: Sensors, Laser systems engineering, Optical testing, Semiconductor lasers, Signal detection, Active sensors, Laser optics, Target detection, Optical amplifiers, Plasma physics

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Proceedings Article | 2 July 1998 Paper

New principle for self-calibration techniques in phase-shift interferometry

Adrian Dobroiu, Dan Apostol, Victor Damian, Victor Nascov

Proceedings Volume 3405, (1998) https://doi.org/10.1117/12.312700

KEYWORDS: Phase shifts, Calibration, Phase shifting, Interferometry, Wavefronts, Error analysis, Visibility, Signal to noise ratio, Phase interferometry, Laser interferometry

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SPIE Journal Paper | 1 May 1996

Sensitivity analysis of parameter determination from measurements of directly measurable quantities using the Jacobian

Dan Apostol, Petre-Catalin Logofatu, Victor Damian, Adrian Dobroiu

OE, Vol. 35, Issue 05, (May 1996) https://doi.org/10.1117/12.10.1117/1.600998

KEYWORDS: Phase shifts, Phase interferometry, Interferometry, Refractive index, Error analysis, Optical engineering, Atomic, molecular, and optical physics, Physics, Metals, Reflectivity

Proceedings Article | 8 March 1995 Paper

Large angle measurement by interferometry

Dan Apostol, Constantin Blanaru, Victor Damian, Petre-Catalin Logofatu, R. Tumbar, Adrian Dobroiu

Proceedings Volume 2461, (1995) https://doi.org/10.1117/12.203477

KEYWORDS: Interferometry, Interferometers, Data processing, Signal generators, Physics, Laser interferometry, Optical testing, Digital signal processing, Transform theory, Signal detection

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Proceedings Article | 8 March 1995 Paper

Interferometric angular transducers

Dan Apostol, Victor Damian, Petre-Catalin Logofatu, R. Tumbar, Adrian Dobroiu

Proceedings Volume 2461, (1995) https://doi.org/10.1117/12.203478

KEYWORDS: Prisms, Interferometry, Transducers, Interferometers, Metrology, Refractive index, Interfaces, Laser metrology, Mirrors, Shearing interferometers

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Showing 5 of 20 publications

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