Mr. Cristian Udrea Profile

Cristian Udrea

at INFLPR

SPIE Involvement:

Author

Publications (10)

Proceedings Article | 14 December 2016 Paper

Assessment of illumination conditions in a single-pixel imaging configuration

Florin Garoi, Cristian Udrea, Cristian Damian, Petre Logofătu, Daniela Colţuc

Proceedings Volume 10010, 1001011 (2016) https://doi.org/10.1117/12.2243295

KEYWORDS: Reconstruction algorithms, Signal to noise ratio, Multiplexing, Image quality, Photodiodes, Sensors, Modulation, Micromirrors, Signal to noise ratio, Image processing, Digital micromirror devices

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Proceedings Article | 20 February 2015 Paper

Implementation of Hadamard spectroscopy using MOEMS as a coded aperture

T. Vasile, V. Damian, D. Coltuc, F. Garoi, C. Udrea

Proceedings Volume 9258, 92581H (2015) https://doi.org/10.1117/12.2072259

KEYWORDS: Spectroscopy, Digital micromirror devices, Spectrometers, Signal to noise ratio, Mirrors, Coded apertures, Micromirrors, Computer programming, Microopto electromechanical systems, Photodiodes

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Proceedings Article | 20 February 2015 Paper

1D hyperspectral images of a light emitting diodes array

I. Urzica (Iordache), V. Damian, P. Logofatu, D. Apostol, T. Vasile, C. Udrea

Proceedings Volume 9258, 92581C (2015) https://doi.org/10.1117/12.2072046

KEYWORDS: Hyperspectral imaging, Charge-coupled devices, Light emitting diodes, Monochromators, Imaging systems, Image processing, CCD cameras, 3D image processing, Mirrors, Diodes

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Proceedings Article | 20 February 2015 Paper

Physical Fourier encoding and compacting of optical data

Petre Logofatu, Florin Garoi, Victor Damian, Cristian Udrea

Proceedings Volume 9258, 925810 (2015) https://doi.org/10.1117/12.2071912

KEYWORDS: Fourier transforms, Computer programming, Charge-coupled devices, CCD image sensors, Sensors, Transparency, Polarizers, Diffractive optical elements, Fourier optics, Lenses

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Proceedings Article | 1 November 2012 Paper

Phase-shifting interferometry with a reflective diffraction grating for adaptive optics

F. Garoi, Petre Logofatu, D. Apostol, C. Udrea

Proceedings Volume 8411, 84110R (2012) https://doi.org/10.1117/12.966844

KEYWORDS: Diffraction gratings, Wavefronts, Wavefront sensors, Phase interferometry, Deformable mirrors, Adaptive optics, Sensors, Reflectivity, Phase shifts, Interferometry

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Proceedings Article | 1 November 2012 Paper

Aluminum nanoparticles production with laser ablation in liquids

C. Udrea, M. Bojan, I. Iordache, I. Apostol, V. Damian

Proceedings Volume 8411, 841124 (2012) https://doi.org/10.1117/12.977951

KEYWORDS: Aluminum, Laser ablation, Nanoparticles, Liquids, Nd:YAG lasers, Pulsed laser operation, Optical microscopy, Shape analysis, Sensors, Plasma

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Proceedings Article | 1 November 2012 Paper

Optical analyses of pulsed interferometric patterning of azo-polysiloxanes

V. Damian, Ileana Apostol, N. Hurduc, Mihaela Bojan, C. Udrea

Proceedings Volume 8411, 841128 (2012) https://doi.org/10.1117/12.966848

KEYWORDS: Interferometry, Diffraction, Diffraction gratings, Modulation, Optical lithography, Polymers, Optical interferometry, Optical analysis, Sensors, Microelectronics

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SPIE Journal Paper | 1 October 2011

High diffraction order grating interferometer for pitch measurement

Dan Apostol, Cristian Udrea, Florin Garoi, Tiberius Vasile, Petre Catalin Logofatu

OE, Vol. 50, Issue 10, 105601, (October 2011) https://doi.org/10.1117/12.10.1117/1.3633332

KEYWORDS: Diffraction gratings, Interferometers, Diffraction, Interferometry, Geometrical optics, Sensors, Optical engineering, Error analysis, Physics, Image resolution

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Proceedings Article | 26 July 2011 Paper

Aluminum nanoparticles production by laser ablation in liquids

V. Damian, C. Udrea, M. Bojan, C. Luculescu, A. Armaselu, I. Apostol

Proceedings Volume 8001, 80012G (2011) https://doi.org/10.1117/12.894525

KEYWORDS: Nanoparticles, Laser ablation, Aluminum, Liquids, Scanning electron microscopy, Particles, Solids, Pulsed laser operation, Plasma, Optical interferometry

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Proceedings Article | 4 December 2010 Paper

Preliminary ellipsometric studies and tests for measuring the birefringence of electro-optic materials

Petre Logofatu, Cristian Udrea, Valentin Ion, Nicu Doinel Scărişoreanu, Raluca Műller

Proceedings Volume 7821, 782114 (2010) https://doi.org/10.1117/12.882140

KEYWORDS: Electro optics, Birefringence, Thin films, Polarizers, Polarization, Ellipsometry, Phase compensation, Thin film devices, Crystals, Optical components

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Showing 5 of 10 publications

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