A5034120184- Additive Manufacturing and 3D Printing Technologies
- Digital Holography and Microscopy
- Advanced X-ray Imaging Techniques
- Anatomy and Medical Technology
- Advanced Electron Microscopy Techniques and Applications
- Advanced Optical Imaging Technologies
- Optical measurement and interference techniques
- Nuclear Physics and Applications
- Advanced optical system design
- Advanced Fluorescence Microscopy Techniques
- Image Processing Techniques and Applications
- Ultrasound Imaging and Elastography
- Soil Moisture and Remote Sensing
- 3D Shape Modeling and Analysis
- Engineering Technology and Methodologies
- Computer Graphics and Visualization Techniques
- Laser-Plasma Interactions and Diagnostics
- Photoacoustic and Ultrasonic Imaging
- Manufacturing Process and Optimization
- Photonic and Optical Devices
- Computational Physics and Python Applications
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Optical Coherence Tomography Applications
- Parallel Computing and Optimization Techniques
Leibniz Institute of Photonic Technology
2022-2024
École Polytechnique Fédérale de Lausanne
2023-2024
Applied Photonics (United Kingdom)
2024
Friedrich Schiller University Jena
2022-2023
Conventional (CP) and Fourier (FP) ptychography have emerged as versatile quantitative phase imaging techniques. While the main application cases for each technique are different, namely lens-less short wavelength CP lens-based visible light FP, both methods share a common algorithmic ground. FP in part independently evolved to include experimentally robust forward models inversion This separation has resulted plethora of extensions, some which not crossed boundary from one modality other....
Tomographic Volumetric Additive Manufacturing (TVAM) allows printing of mesoscopic objects within seconds or minutes. In TVAM, tomographic patterns are illuminated onto a rotating glass vial which contains photosensitive resin. Current pattern optimization is based on ray optical assumption ultimately leads to limited resolution around 20 µm and varying throughout the volume 3D object. this work, we introduce rigorous wave-based amplitude scheme for TVAM shows that high-resolution...
Coherent field propagation is an essential computational tool in optics with applications ranging from and optical design to iterative reconstructions. An improvement the speed of current methods therefore highly desired. We describe a scalable angular spectrum (SAS) algorithm zoom capability for numerical scalar wave fields homogeneous media. It allows models where destination pixel pitch larger than source pitch, requires complexity proportional cost three successive fast Fourier transform...
The relentless pursuit of understanding matter at ever-finer scales has pushed optical microscopy to surpass the diffraction limit and realize super-resolution microscopy, which enables visualizing structures shorter than wavelength light emitted by sample. In present work, we harnessed extreme ultraviolet beams create sub- μm grating structures, were revealed structured illumination microscopy. We establish that resolution extension is achievable in ultraviolet, thereby opening door...
Tomographic Volumetric Additive Manufacturing (TVAM) is an emerging 3D printing technology that can create complex objects in under a minute. The key idea to project intense light patterns onto rotating vial of photo-sensitive resin, causing polymerization where the cumulative dose these reaches threshold. We formulate pattern calculation as inverse transport problem and solve it via physically based differentiable rendering. In doing so, we address longstanding limitations prior work by...
Conventional (CP) and Fourier (FP) ptychography have emerged as versatile quantitative phase imaging techniques. While the main application cases for each technique are different, namely lens-less short wavelength CP lens-based visible light FP, both methods share a common algorithmic ground. FP in part independently evolved to include experimentally robust forward models inversion This separation has resulted plethora of extensions, some which not crossed boundary from one modality other....
Tomographic Volumetric Additive Manufacturing (TVAM) allows printing of mesoscopic objects within seconds or minutes. patterns are illuminated onto a rotating glass vial which contains photosensitive resin. Current pattern optimization is based on ray optical assumption ultimately leads to limited resolution around $20\mu\textrm{m}$ and varying throughout the volume 3D object. In this work, we introduce rigorous wave-based amplitude scheme for TVAM shows that high-resolution theoretically...
The relentless pursuit of understanding matter at ever-finer scales has pushed optical microscopy to surpass the diffraction limit and produced super-resolution which enables visualizing structures shorter than wavelength light. In present work, we harnessed extreme ultraviolet beams create a sub-{\mu}m grating structure, was revealed by structured illumination microscopy. This achievement marks first step toward extending such technique into X-ray regime, where achieving atomic-scale...
We introduce an optimization framework for ray and wave optical tomographic volumetric additive manufacturing (TVAM). In TVAM, patterns are projected with a light modulator onto photocurable resin from different angular directions. Once energy dose threshold is crossed, the starts polymerizing. Current approaches assume model propagation, using Radon transform as backbone, which breaks down small features in region of 20 μm. this work we describe how allows to optically print smaller feature...
A scalable angular spectrum (SAS) algorithm with zoom capability for numerical propagation of scalar wave fields in homogeneous media is presented. The proposed method features three properties that distinguish it from existing methods: (1) It allows models where the destination pixel pitch larger than source pitch, (2) requires a computational complexity proportional to cost successive fast Fourier transform (FFT) operations input field, and (3) valid high aperture (NA) geometries. We find...
Abstract: Fourier ptychography is an emerging computational microscopy technique that can generate gigapixel-scale images of biological samples. With only the addition a low-cost LED array to standard digital microscope and reconstruction algorithm, overcomes fundamental trade-off between microscope's resolution field-of-view without any moving parts. This article first in three-part series aims introduce fundamentals technology broader community beyond, using intuitive explanations.
Abstract: This article is the second within a three-part series on Fourier ptychography, which computational microscopy technique for high-resolution, large field-of-view imaging. While first laid out basics of this part sheds light its algorithmic ingredients. We present non-technical discussion phase retrieval, allows synthesis high-resolution images from sequence low-resolution raw data. ptychographic retrieval can be carried standard, widefield platforms with simple addition low-cost LED...
Abstract: This is the third article within a three-part series on Fourier ptychography, which computational microscopy technique for high-resolution, large field-of-view imaging. While previous articles introduced working principles of technique, in this we focus practical benefits that it brings to imaging community. We present didactic overview most important and well-established use-cases such as gigapixel imaging, quantitative phase contrast, thick sample aberration metrology. also...
A scalable angular spectrum (SAS) algorithm with zoom capability for numerical propagation of scalar wave fields in homogeneous media is presented. The proposed method features three properties that distinguish it from existing methods: (1) It allows models where the destination pixel pitch larger than source pitch, (2) requires a computational complexity proportional to cost successive fast Fourier transform (FFT) operations input field, and (3) valid high aperture (NA) geometries. We find...
Deconvolution is a versatile method to enhance the quality of signals measured with systems which can be expressed mathematically as convolution system's response function signal.In this paper, we present DeconvOptim.jl,a flexible toolbox written in Julia deconvolve one or multiple multi-dimensional have been degraded by signal function.DeconvOptim.jlworks both on CPUs and GPUs utilizes recent advancements Julias automatic differentiation ecosystem.In work demonstrate that...
We introduce the Kaleidomicroscope-a kaleidoscopic multview microscope. A mirror box in front of objective allows to capture different 3D views a sample. deconvolution is demonstrated simulations and experiments.