Micromachines, Free Full-Text
Thin film ablation with pulsed nanosecond lasers can benefit from the use of beam shaping optics to transform the Gaussian beam profile with a circular footprint into a Top-Hat beam profile with a rectangular footprint. In general, the quality of the transformed beam profile depends strongly on the beam alignment of the entire laser system. In particular, the adjustment of the beam shaping element is of upmost importance. For an appropriate alignment of the beam shaper, it is generally necessary to observe the intensity distribution near the focal position of the applied focusing optics. Systems with a low numerical aperture (NA) can commonly be qualified by means of laser beam profilers, such as a charge-coupled device (CCD) camera. However, laser systems for micromachining typically employ focus lenses with a high NA, which generate focal spot sizes of only several microns in diameter. This turns out to be a challenge for common beam profiling measurement systems and complicates the adjustment of the beam shaper strongly. In this contribution, we evaluate the quality of a Top-Hat beam profiling element and its alignment in the working area based on the ablated geometry of single pulse ablation of thin transparent conductive oxides. To determine the best achievable adjustment, we develop a quality index for rectangular laser ablation spots and investigate the influences of different alignment parameters, which can affect the intensity distribution of a Top-Hat laser beam profile.
Unraveling metagenomics through long-read sequencing: a comprehensive review, Journal of Translational Medicine
Micromachines, Free Full-Text, mdpope 1-3
Desire FX 3d models UNIT9 – Micromachines Corp – Crusher – 3D Print Model
Visualizing intracellular nanostructures of living cells using nanoendoscopy-AFM, entfernung membran
Micro Machines Super City Toolbox Action Playset, Jim Fong
Frontiers Application of Microfluidics in Detection of Circulating Tumor Cells, tube miniature complexe
Fresnel Lens: Most Up-to-Date Encyclopedia, News & Reviews, fresnel lens
Micromachines, Free Full-Text, mini led
Micromachines, Free Full-Text
Micro Machines Vintage Rare Mini Insiders Garages Plus Car - New Zealand
Micro Machines
2000 Micro Machines - JOE'S CURIOS
Micromachines, Free Full-Text
Micromachines, Free Full-Text, mdpope 1-3