Browsing by Subject "Laser applications"

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  • Stenz, Ulrich; Hartmann, Jens; Paffenholz, Jens-André; Neumann, Ingo (Basel : MDPI AG, 2017)
    Terrestrial laser scanning (TLS) is an efficient solution to collect large-scale data. The efficiency can be increased by combining TLS with additional sensors in a TLS-based multi-sensorsystem (MSS). The uncertainty of ...
  • Kaartinen, Harri; Hyyppä, Juha; Yu, Xiaowei; Vastaranta, Mikko; Hyyppä, Hannu; Kukko, Antero; Holopainen, Markus; Heipke, Christian; Hirschmugl, Manuela; Morsdorf, Felix; Næsset, Erik; Pitkänen, Juho; Popescu, Sorin; Solberg, Svein; Wolf, Bern Michael; Wu, Jee-Cheng (Basel : MDPI AG, 2012)
    The objective of the "Tree Extraction" project organized by EuroSDR (European Spatial data Research) and ISPRS (International Society of Photogrammetry and Remote Sensing) was to evaluate the quality, accuracy, and feasibility ...
  • Willemsen, T.; Brinkmann, M.; Jupé, M.; Gyamfi, M.; Schlichting, S.; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)
    Ultra-short laser applications require high quality dielectric optics. The natural dispersion of light needs to be matched by dielectric components. However such dispersive components are very challenging for the deposition ...
  • Hassel, T.; Klimov, G.; Beniyash, A. (Bristol : Institute of Physics Publishing, 2018)
    One of the disadvantages of the non-vacuum electron beam (NVEB) systems is a high acceleration voltage, which leads to an increase of defence against X-ray radiation. Due to the reduced acceleration voltage. On the one ...
  • Omidalizarandi, Mohammad; Neumann, Ingo (Hannover : International Society for Photogrammetry and Remote Sensing, 2015)
    In the current state-of-the-art, geodetic deformation analysis of natural and artificial objects (e.g. dams, bridges,.) is an ongoing research in both static and kinematic mode and has received considerable interest by ...
  • Li, Qingfeng; Grojo, David; Alloncle, Anne-Patricia; Chichkov, Boris; Delaporte, Philippe (Berlin : De Gruyter, 2018)
    Laser direct writing is a well-established ablation technology for high-resolution patterning of surfaces, and since the development of additive manufacturing, laser processes have also appeared very attractive for the ...
  • Willemsen, Thomas; Jupé, Marco; Gyamfi, Mark; Schlichting, Sebastian; Ristau, Detlev (Washington, DC : Optical Society of America, 2017)
    Dielectric components are essential for laser applications. Chirped mirrors are applied to compress the temporal pulse broadening crucial in the femtosecond regime. However, the design sensitivity and the electric field ...
  • Politz, F.; Sester, M. (London : International Society for Photogrammetry and Remote Sensing, 2018)
    Over the past years, the algorithms for dense image matching (DIM) to obtain point clouds from aerial images improved significantly. Consequently, DIM point clouds are now a good alternative to the established Airborne ...
  • Fuchs, Alexander; Pengel, Steffen; Bergmeier, Jan; Kahrs, Lüder Alexander; Ortmaier, Tobias (Bellingham, WA : S P I E - International Society for Optical Engineering, 2015)
    Laser surgery is an established clinical procedure in dental applications, soft tissue ablation, and ophthalmology. The presented experimental set-up for closed-loop control of laser bone ablation addresses a feedback ...
  • Klimov, G.; Maier, H.-J.; Beniyash, A.; Hassel, T. (Bristol : Institute of Physics Publishing, 2018)
    Lightweight construction materials, in particular aluminum alloys, have recently become more important as construction materials due to their low weight with high strength and sufficient wear and corrosion properties. In ...
  • Dudziak, S.; Gieseke, M.; Haferkamp, H.; Barcikowski, S.; Kracht, D. (Amsterdam : Elsevier B.V., 2010)
    NiTi shape memory alloys are considered to be difficult to machine. Dimensional accuracy can hardly be met especially in micro-machining. Being a non-contact tool and therefore independent from machining forces, the laser ...
  • Johannsmeier, Sonja; Heeger, Patrick; Terakawa, Mitsuhiro; Kalies, Stefan; Heisterkamp, Alexander; Ripken, Tammo; Heinemann, Dag (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)
    Gold nanoparticle mediated laser stimulation of neuronal cells allows for cell activation on a single-cell level. It could therefore be considered an alternative to classical electric neurostimulation. The physiological ...
  • Hoffmann, Gerd-Albert; Wolfer, Tim; Reitberger, Thomas; Franke, Jörg; Suttmann, Oliver; Overmeyer, Ludger (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)
    Considering the increasing amount of data for communication and infotainment applications, fabrication of optical networks and bus systems is a challenging task for production engineering. A two-step manufacturing process ...
  • Schön, Steffen; Brenner, Claus; Alkhatib, Hamza; Coenen, Max; Dbouk, Hani; Garcia-Fernandez, Nicolas; Fischer, Colin; Heipke, Christian; Lohmann, Katja; Neumann, Ingo; Nguyen, Uyen; Paffenholz, Jens-André; Peters, Torben; Rottensteiner, Franz; Schachtschneider, Julia; Sester, Monika; Sun, Ligang; Vogel, Sören; Voges, Raphael; Wagner, Bernardo (Basel : MDPI AG, 2018)
    Global Navigation Satellite Systems (GNSS) deliver absolute position and velocity, as well as time information (P, V, T). However, in urban areas, the GNSS navigation performance is restricted due to signal obstructions ...
  • Politz, F.; Sester, M. (London : International Society for Photogrammetry and Remote Sensing, 2019)
    National mapping agencies (NMAs) have to acquire nation-wide Digital Terrain Models on a regular basis as part of their obligations to provide up-to-date data. Point clouds from Airborne Laser Scanning (ALS) are an important ...
  • Bluemel, S.; Bastick, S.; Staehr, R.; Jaeschke, P.; Suttmann, O.; Overmeyer, L. (Amsterdam : Elsevier B.V., 2016)
    For the development of a robot based laser cutting process of automotive 3D parts consisting of carbon fibre reinforced plastics (CFRP), investigations with a newly developed fibre guided nanosecond pulsed laser with an ...
  • Haase, Felix; Rojas, Enrique Garralaga; Bothe, Karsten; Brendel, Rolf (Amsterdam : Elsevier BV, 2011)
    High efficiency solar cells require high generation and low recombination rates. High bulk lifetime, well passivated surfaces, and lowly doped thin emitters allow for low recombination rates. Thin passivated emitters should ...
  • Zhao, Xin; Kargoll, Boris; Omidalizarandi, Mohammad; Xu, Xiangyang; Alkhatib, Hamza (Basel : MDPI AG, 2018)
    Deformation monitoring of structures is a common application and one of the major tasks of engineering surveying. Terrestrial laser scanning (TLS) has become a popular method for detecting deformations due to high precision ...
  • Kermarrec, Gael; Alkhatib, Hamza; Neumann, Ingo (Basel : MDPI AG, 2018)
    For a trustworthy least-squares (LS) solution, a good description of the stochastic properties of the measurements is indispensable. For a terrestrial laser scanner (TLS), the range variance can be described by a power law ...
  • Hartmann, J.; Von Gösseln, I.; Schild, N.; Dorndorf, A.; Paffenholz, J.-A.; Neumann, I. (London : International Society for Photogrammetry and Remote Sensing, 2019)
    In recent years, the requirements in the industrial production of elongated objects, e.g., aircraft, have been increased. An essential aspect of the production process is the 3D object detection as well as the qualitative ...