Mr. Andrei-Ioan Bleahu Profile

Andrei-Ioan Bleahu

Junior Research Fellow at Univ of Tartu

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Author

Publications (6)

Proceedings Article | 31 May 2023 Paper

Realizing large-area diffractive lens using multiple subaperture diffractive lenses and computational reconstruction

Shivasubramanian Gopinath, Agnes Pristy Ignatius Xavier, Praveen Periyasamy Angamuthu, Tauno Kahro, Oskar Tamm, Andrei Bleahu, Francis Gracy Arockiaraj, Daniel Smith, Soon Hock Ng, Saulius Juodkazis, Kaupo Kukli, Aile Tamm, Vijayakumar Anand

Proceedings Volume 12574, 125740O (2023) https://doi.org/10.1117/12.2665675

KEYWORDS: Image sensors, Image processing, Lenses, Point spread functions, Image restoration, Reconstruction algorithms, Imaging systems, Telescopes, Holography, Image resolution

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Proceedings Article | 31 May 2023 Presentation + Paper

Holographic solution to a fundamental problem in diffractive optics: resolution beyond diffraction and lithography limits

Andrei Bleahu, Shivasubramanian Gopinath, Agnes Pristy Ignatius Xavier, Tauno Kahro, Andra Naresh Kumar Reddy, Francis Gracy Arockiaraj, Daniel Smith, Soon Hock Ng, Tomas Katkus, Aravind Simon John Francis Rajeswary, Praveen Periyasami Angamuthu, Siim Pikker, Kaupo Kukli, Aile Tamm, Saulius Juodkazis, Joseph Rosen, Vijayakumar Anand

Proceedings Volume 12574, 125740M (2023) https://doi.org/10.1117/12.2665185

KEYWORDS: Holography, 3D image reconstruction, Lithography, Diffraction limit, Point spread functions, Lawrencium, Super resolution, Image sensors, Holograms, Reconstruction algorithms

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Proceedings Article | 31 May 2023 Paper

Enhanced design of pure phase greyscale diffractive optical elements by phase-retrieval-assisted multiplexing of complex functions

Shivasubramanian Gopinath, Andrei Bleahu, Tauno Kahro, Aravind Simon John Francis Rajeswary, Ravi Kumar, Kaupo Kukli, Aile Tamm, Joseph Rosen, Vijayakumar Anand

Proceedings Volume 12574, 1257404 (2023) https://doi.org/10.1117/12.2665170

KEYWORDS: Multiplexing, Holograms, 3D image reconstruction, Spatial light modulators, Sensors, Diffractive optical elements, Phase shifts, Holography, Design and modelling, Lenses

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Proceedings Article | 31 May 2023 Presentation + Paper

Fresnel incoherent correlation holography with Lucy-Richardson-Rosen algorithm and modified Gerchberg-Saxton algorithm

Andrei Bleahu, Shivasubramanian Gopinath, Francis Gracy Arockiaraj, Aravind Simon John Francis Rajeswary, Saulius Juodkazis, Vijayakumar Anand

Proceedings Volume 12574, 125740A (2023) https://doi.org/10.1117/12.2680194

KEYWORDS: Lawrencium, Multiplexing, Holograms, 3D image reconstruction, Reconstruction algorithms, Algorithm development, Polarization, Holography, Temporal resolution, Spatial light modulators

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Proceedings Article | 15 March 2023 Poster + Paper

Deep deconvolution of object information transformed by a lens

Shivasubramanian Gopinath, P.A. Praveen, Francis Gracy Arokiaraj, Daniel Smith, Tauno Kahro, Sandhra-Mirella Valdma, Andrei Bleahu, Soon Hock Ng, Andra Naresh Kumar Reddy, Tomas Katkus, Aravind Simon John Francis Rajeswary, Rashid Ganeev, Siim Pikker, Kaupo Kukli, Aile Tamm, Saulius Juodkazis, Vijayakumar Anand

Proceedings Volume 12438, 1243818 (2023) https://doi.org/10.1117/12.2648269

KEYWORDS: Point spread functions, Image restoration, Reconstruction algorithms, Imaging systems, Algorithm development, Quantum 3D imaging, Deconvolution, Computational imaging, Light emitting diodes, Image deconvolution

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Proceedings Article | 8 March 2023 Poster + Paper

4D imaging using accelerating airy beams and nonlinear reconstruction

Andrei Bleahu, Shivasubramanian Gopinath, Ravi Kumar, Francis Gracy Arokiaraj, Daniel Smith, Tauno Kahro, P. Praveen, Soon Hock Ng, Agnes Pristy, Tomas Katkus, Aravind Simon John Francis Rajeswary, Kaupo Kukli, Aile Tamm, Saulius Juodkazis, Joseph Rosen, Vijayakumar Anand

Proceedings Volume 12445, 124450Z (2023) https://doi.org/10.1117/12.2649853

KEYWORDS: Airy beams, Point spread functions, Image restoration, Design and modelling, Tunable filters, Phase only filters, Optical filters, Cameras, 3D mask effects, Stereoscopy

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Showing 5 of 6 publications

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