A5053579182- Digital Holography and Microscopy
- Optical measurement and interference techniques
- Advanced Optical Imaging Technologies
- Image Processing Techniques and Applications
- Advanced Memory and Neural Computing
- Neural Networks and Reservoir Computing
- Near-Field Optical Microscopy
- Quantum-Dot Cellular Automata
- Geotechnical and Mining Engineering
- Advanced Fiber Laser Technologies
- Advanced optical system design
- Laser-Matter Interactions and Applications
- Metal and Thin Film Mechanics
- Spectroscopy Techniques in Biomedical and Chemical Research
- Diamond and Carbon-based Materials Research
- Advanced materials and composites
- Force Microscopy Techniques and Applications
- Microfluidic and Bio-sensing Technologies
- Photoreceptor and optogenetics research
- Advanced Measurement and Metrology Techniques
Technical University of Liberec
2016-2023
Czech Academy of Sciences, Institute of Plasma Physics
2017-2023
Czech Academy of Sciences
2019
High-precision measurements of mechanical parts' surface topography represent an essential task in many industry sectors. Examples such tasks are, e.g., precise alignments opto-mechanical systems, large object deformation measurements, evaluation shape, and others. Today, the standard method used for is based on use coordinate measuring machines (CMMs). Unfortunately, CMMs have severe shortcomings: low measurement point density, long time, risk damage, etc. Indeed, time rapidly increases...
This special session paper introduces the Horizon Europe NEUROPULS project, which targets development of secure and energy-efficient RISC-V interfaced neuromorphic accelerators using augmented silicon photonics technology. Our approach aims to develop an platform, FPGA-powered RISC-V-connected computing a complete simulation platform demonstrate accelerator capabilities. In particular, their main advantages limitations will be addressed concerning underpinning technology for each platform....
This paper describes the dependence of precision digital holographic methods on measurement parameters. The predominantly discussed parameters are illumination intensity and its homogeneity, surface microroughness, influence geometry, as well object shape, since most them can be optimized by experimental arrangement. Frequency sweeping holography dual-wavelength in Fourier arrangement tested results discussed. It transpires that not very sensitive to microroughness or overall reflectivity....
Titanium-aluminium base nanomultilayer (NML) coatings are deposited by cathodic arc evaporation using pure titanium and aluminium with eighteen percent silicon cathodes. Each multilayer Ti-Al-Si-N structure consists of 49 bi-layers different thickness. The external layer is five times longer growing period. at the pressure 2 Pa substrate temperature 400 °C. Polished steel discs (Ø 20 mm × 5 thick) used as material.This article presents an investigation surface morphology mechanical...
This paper introduces a technique for freeform optical surface measurements using digital holography with multiple discrete wavelengths or wavelength scans. experimental arrangement, i.e., Mach-Zehnder holographic profiler, is optimized to achieve maximal theoretical precision and capable of measuring diffuse surfaces. Moreover, the approach can also be used diagnostics precise placement elements within systems.
This article presents a novel approach to targeted 4f pulse shaping using phase plates fabricated by single-point diamond turning (SPDT) machining. The manufacturing of the SPDT is versatile, cost-effective, fast, robust, and applicable across wide range optical materials, spanning from visible far-infrared spectra (e.g., PMMA, ZnSe). Manufactured profiles can be used for manipulation structuring, analogously programable spatial light modulators (SLM). We demonstrate that waveforms...
Recently, a digital holographic method called Frequency Sweeping Digital Holography (FSDH) for high precision measurements of surface topography mechanical parts has been introduced. The greatest advantage the presented FSDH is fact that measurement absolute. i.e. optical path difference independently retrieved in every single pixel. This approach can therefore be used also large displacements and deformation. particularly suitable cases where common methods fail due to e.g. 2π unambiguity...
This paper presents newly developed method for measurement of surface topography based on frequency scanning digital holography. Digital holography allows direct computation the phase field wavefront scattered by an object. A tuning light source optical results in linear variation with respect to frequency. Slope function every single pixel corresponds absolute path difference and thus map can be retrieved. Principle this contactless is introduced experimentally verified. The used complex...
This paper introduces Frequency Sweeping Fourier Digital Holography for absolute measurement of complex surfaces topography. Optical fiber components in combination with lensless arrangement allow to avoid dispersion and make the compact
Digital holographic microscopy (DHM) is an effective method for the evaluation of surface topography. It combines high lateral resolution with axial interferometry. In this paper, DHM subaperture stitching tribology presented. The developed approach allows large area inspection by together multiple measurements, which brings a big advantage to tribological tests such as track on thin layer. whole measurement provides additional parameters, can offer more information result test than...
This special session paper introduces the Horizon Europe NEUROPULS project, which targets development of secure and energy-efficient RISC-V interfaced neuromorphic accelerators using augmented silicon photonics technology. Our approach aims to develop an platform, FPGA-powered RISC-V-connected computing a complete simulation platform demonstrate accelerator capabilities. In particular, their main advantages limitations will be addressed concerning underpinning technology for each platform....
This paper presents digital holographic method for vizualization of 3D refractive index distribution within ferroelectric crystal. The metod is based on microscopy with tomographic approach where the sample - Lithium Niobate placed rotary stage.
Digital stitching holographic microscopy is a promising method for extensive surface area inspection. It offers high lateral and axial resolution large imaging, making it suitable evaluating tribologic tests.
Freeform optics are quickly gaining importance in optics, but measurement methods lag behind. In this research we propose new system designed especially for convex freeform objects using multiwavelength digital holography.