Institut für Strahlwerkzeuge (IFSW)

Konferenzbeiträge

Hier finden Sie alle Konferenzbeiträge des IFSW.

Konferenzbeiträge

  1. 2019

    1. P. Berger, “Numerical investigations of the temperature distribution around the capillary and its effect on the stability of the capillary rear wall,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2019.
    2. C. Hagenlocher, J. Wagner, D. Weller, R. Weber, and T. Graf, “PREDICTION OF THE HOT CRACKING SUSCEPTIBILITY OF LASER BEAM WELDS IN ALUMINUM ALLOYS,” 2019.
    3. D. Holder, S. Boley, M. Buser, C. Irion, R. Weber, and T. Graf, “OCT-controlled generation of complex geometries on stainless steel using ultra-short laser pulses,” presented at the Lasers in Manufacturing Conference, Munich, 2019.
    4. A. Leis, L. Voltin, R. Weber, and T. Graf, “Correlation of Spatter Formation and Process Parameters during Selective Laser Melting of AlSi10Mg,” 2019.
    5. C. Röcker et al., “Flexible Sub-1 ps Ultrafast Laser Exceeding 1 kW of Output Power for High-Throughput Surface Structuring,” in Laser Congress 2019 (ASSL, LAC, LS&C), 2019, p. AM4A.2, doi: 10.1364/ASSL.2019.AM4A.2.
    6. M. Sawannia, P. Berger, M. Jarwitz, R. Weber, and T. Graf, “Determination of the 3D-Geometry of Cutting Fronts with High Temporal Resolution,” presented at the LiM, Lasers in Manufacturing, München, Bayern, Deutschland, 2019.
    7. J.-H. Wolter et al., “Ti:Sapphire Thin-Disk Laser with Plano-Convex-Shaped Single-Crystal Diamond Heat Spreaders,” in 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, 2019, p. 1, doi: 10.1109/CLEOE-EQEC.2019.8871868.
  2. 2018

    1. R. Weber, D. J. Förster, and R. Giedel-Wagner, “X ray Emission During Ultra Short Pulsed Laser Processing,” presented at the SLT 2018, Messe Stuttgart, 2018.
  3. 2017

    1. S. Faas, C. Sciancalepore, R. Weber, L. Romoli, and T. Graf, “Surface structuring with a 500 W picosecond laser,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2017.
    2. C. Hagenlocher, J. Nolte, R. Weber, and T. Graf, “Strain behavior during the initiation process of centerline cracks in laser welding of aluminum alloys,” 2017.
  4. 2016

    1. C. Hagenlocher, P. Stritt, H. Friebe, C. Blumenthal, R. Weber, and T. Graf, “Space and time resolved determination of thermomechanical deformation adjacent to the solidification zone during hot crack formation in laser welding.,” 2016.
  5. 2015

    1. P. Berger, A. Heider, M. Boley, and D. Förster, “Capillary geometries during welding of metals observed with X-ray technique and calculated using a ray-tracing tool and a finite volume program treating heat diffusion and fluid flow,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2015.
    2. O. Bocksrocker, P. Berger, T. Hesse, M. Boley, and T. Graf, “Measurement of the laser cut front geometry,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2015.
    3. C. Freitag, S. Mader, M. Wiedenmann, V. Onuseit, R. Weber, and T. Graf, “Ansätze zur Steigerung der Prozesseffizienz beim Trennen von CFK mit Mehrfachüberfahrten,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2015.
    4. D. Förster, “Absorptivitätsänderung bei der Bestrahlung von Metallen,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2015.
    5. G. Granger, C. Röhrer, G. Kleem, M. Abdou Ahmed, and T. Graf, “Generation of Supercontinuum LP0n Modes in Highly Multimode Gradient-Index Fiber,” in Advanced Solid State Lasers, 2015, p. ATu2A.36, doi: 10.1364/ASSL.2015.ATu2A.36.
    6. A. Heider, R. Weber, D. Hermann, P. Herzog, and T. Graf, “Power modulation to stabilize laser welding of copper,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2015.
    7. K. Heller, S. Kessler, F. Dorsch, P. Berger, and T. Graf, “Robust ‘false friend’ detection via thermographic imaging,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2015.
    8. M. Jarwitz, J. Johannsen, P. Stritt, R. Weber, and T. Graf, “Heat transfer and heat conduction during laser welding of Ni-sheets to Ni-foam,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2015.
    9. R. Weber, C. Freitag, M. Wiedenmann, and T. Graf, “High-Quality Laser Processing of CFRP,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2015.
    10. R. Weber, C. Freitag, M. Wiedenmann, V. Onuseit, and T. Graf, “Kilowatt Average Power Short-Pulse Laser Processing of CFRP - Quality Challenges,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2015.
    11. D. Weller et al., “Hot Crack formation when welding aluminum alloys at close-edge position with remote technology,” presented at the Lasers in Manufacturing Conference (LiM), Munich, Germany, 2015.
  6. 2013

    1. P. Berger and H. Hügel, “Fluid dynamic effects in keyhole welding - an attempt to characterize different regimes,” in Phsics Procedia, Munich, Germany, 2013, vol. 41, pp. 216–224.
    2. M. Boley, F. Abt, R. Weber, and T. Graf, “X-Ray and Optical Videography for 3D Measurement of Capillary and Melt Pool Geometry in Laser Welding,” in Phsics Procedia, Munich, Germany, 2013, vol. 41.
    3. C. Freitag, “Absorption in Carbonfasern und CFK,” in Phsics Procedia, Munich, Germany, 2013, vol. 41.
    4. A. Heider, F. Abt, M. Boley, R. Weber, and T. Graf, “History of one Spatter,” in Phsics Procedia, Munich, Germany, 2013, vol. 41.
    5. M. Jarwitz, V. Rominger, and A. Heider, “Metal vapour influence on laser welding,” in Phsics Procedia, Munich, Germany, 2013, vol. 41.
    6. V. Onuseit, R. Weber, M. Wiedenmann, C. Freitag, and T. Graf, “Efficient Laser Processing of CFRP,” in Phsics Procedia, Munich, Germany, 2013, vol. 41.
    7. P. Stritt, R. Weber, and T. Graf, “Neue Lasersicherheitskonzepte mit alternativen Schutzwandmaterialien,” in Phsics Procedia, Munich, Germany, 2013, vol. 41.
    8. D. Weller, C. Bezençon, P. Stritt, R. Weber, and T. Graf, “Remote laser welding of multi-alloy aluminum at close-edge position,” in Phsics Procedia, Munich, Germany, 2013, vol. 41.
  7. 2012

    1. X. Délen et al., “250 W single crystal fiber Yb:YAG laser,” in Lasers, Sources, and Related Photonic Devices, San Diego, California, United States, 2012, p. AM6A.2, doi: 10.1364/ASSP.2012.AM6A.2.
  8. 2011

    1. F. Abt, M. Boley, R. Weber, T. Graf, G. Popko, and S. Nau, “Novel X-ray system for in-situ diagnostics of laser based processes : First experimental results,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, p. 761ff, doi: 10.1016/j.phpro.2011.03.001.
    2. F. Abt et al., “Camera based closed loop control for partial penetration welding of overlap joints,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, p. 730ff, doi: 10.1016/j.phpro.2011.03.001.
    3. P. Berger, H. Hügel, A. Heß, R. Weber, and T. Graf, “Understanding of Humping Based on Conservation of Volume Flow,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, doi: 10.1016/j.phpro.2011.03.001.
    4. P. Berger, H. Hügel, and T. Graf, “Understanding Pore Formation in Laser Beam Welding,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, p. 0, doi: 10.1016/j.phpro.2011.03.001.
    5. A. Blug et al., “Closed-loop control of laser power using the full penetration hole image feature in aluminum welding processes,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, p. 720ff, doi: 10.1016/j.phpro.2011.03.001.
    6. A. Heider, A. Heß, R. Weber, and T. Graf, “Quantitative analysis of High-Speed-Videos at Welding Copper,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, doi: 10.1016/j.phpro.2011.03.001.
    7. A. Heider, P. Stritt, A. Heß, R. Weber, and T. Graf, “Process Stabilization at Welding Copper by Laser Power Modulation,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, doi: 10.1016/j.phpro.2011.03.001.
    8. A. Michalowski, C. Freitag, R. Weber, and T. Graf, “Laser surface structuring with long depth of focus,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, pp. 357–361, doi: 10.1016/j.phpro.2011.03.001.
    9. P. Stritt, A. Esser, R. Weber, and T. Graf, “Laser Safety Barriers,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, doi: 10.1016/j.phpro.2011.03.001.
    10. C. Thiel, A. Heß, R. Weber, and T. Graf, “Stabilization of laser welding processes by means of beam oscillation,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, pp. 351–354, doi: 10.1016/j.phpro.2011.03.001.
    11. R. Weber et al., “High-repetition rate short-pulse laser processing of CFRP,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, doi: 10.1016/j.phpro.2011.03.001.
    12. R. Weber et al., “Laser Processing of Carbon Fibre Reinforced Polymers,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, doi: 10.1016/j.phpro.2011.03.001.
    13. J.-P. Weberpals, T. Hermann, P. Berger, and H. Singpiel, “Utilisation of Thermal Radiation for Process Monitoring,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, pp. 704–711, doi: 10.1016/j.phpro.2011.03.001.
    14. J.-P. Weberpals, P. Krueger, P. Berger, and T. Graf, “Understanding the Influence of the Focal Position in Laser Welding on Spatter Reduction,” in Phsics Procedia, Munich, Germany, 2011, vol. 12, Part A, doi: 10.1016/j.phpro.2011.03.001.
  9. 2009

    1. F. Abt, L. Nicolosi, A. Blug, F. Dausinger, R. Tetzlaff, and H. Höfler, “CNN-Cameras for Closed Loop Control of Laser Welding : Experimental Results and Prospects,” in Lasers in Manufacturing 2009, Munich, Germany, 2009, pp. 345–350.
    2. P. Gärtner and R. Weber, “Spatter formation and keyhole observation with high-speed cameras,” in Lasers in Manufacturing 2009, Munich, Germany, 2009, pp. 737–740.
    3. A. Heß, R. Weber, A. Heider, and T. Graf, “Forced deep-penetration welding with low-power second-harmonic assistance of cw copper welding with 1 µm wavelength,” presented at the Fifth International WLT-Conference on Lasers in Manufacturing (LiM), Munich, Germany, 2009.
    4. V. Onuseit, P. Gärtner, M. Abdou Ahmed, A. Voß, R. Weber, and T. Graf, “Axially symmetric polarized laser beams materials processing,” presented at the Fifth International WLT-Conference on Lasers in Manufacturing (LiM), Munich, Germany, 2009.
    5. C. Thiel and R. Weber, “Process Control System for High Speed Welding with Lasers of High Brightness,” presented at the Fifth International WLT-Conference on Lasers in Manufacturing (LiM), Munich, Germany, 2009.
    6. R. Weber, R. Gauch, and T. Graf, “Influencing the melt pool dynamics with short pulses,” presented at the Fifth International WLT-Conference on Lasers in Manufacturing (LiM), Munich, Germany, 2009.
    7. J.-P. Weberpals, R. Schuster, P. Berger, and T. Graf, “Utilization of Quantitative Measurement Categories for Process Monitoring,” in Lasers in Manufacturing 2009, Munich, Germany, 2009, pp. 39–42.
  10. 2007

    1. F. Abt, A. Heß, and F. Dausinger, “Focusing of high power single mode laser beams,” presented at the Fourth International WLT-Conference on Lasers in Manufacturing (LiM), Munich, Germany, 2007.
    2. S. Sommer, F. Dausinger, P. Berger, and H. Hügel, “Aerodynamic window for high precision laser drilling,” in Lasers in Manufacturing 2007, Munich, Germany, 2007, pp. 457–460.
    3. D. Walter, A. Michalowski, R. Gauch, and F. Dausinger, “Monitoring of the micro-drilling process by means of laser-induced shock waves,” in Lasers in Manufacturing 2007, Munich, Germany, 2007, pp. 557–562.
    4. D. Walter, A. Michalowski, R. Gauch, and F. Dausinger, “Monitoring of the micro-drilling process by detection of laser-induced shock waves in air,” in Lasers in Manufacturing 2007, Munich, Germany, 2007, pp. 569–573.
    5. J.-P. Weberpals and F. Dausinger, “Influence of Inclination Angle on Spatter Behavior at Welding with Lasers of Strong Focusability,” in Lasers in Manufacturing 2007, Munich, Germany, 2007, pp. 339–343.
  11. 2005

    1. J. Müller-Borhanian, “Camera Based In-Process Monitoring during Laser Beam Welding - Wave Length Dependence.,” presented at the Third International WLT-Conference on Lasers in Manufacturing (LiM), Munich, Germany, 2005.
    2. S. Sommer, D. Breitling, M. Kraus, C. Föhl, and F. Dausinger, “Strategies to improve quality and productivity of structuring metals with ultra-short laser pulses,” in Lasers in Manufacturing 2005, Munich, Germany, 2005, pp. 625–628.
  12. 2003

    1. P. Berger, F. Dausinger, and H. Hügel, “Laser Welding of Aluminium Alloys - Scaling Laws and Identification of Parameters Determining the Quality of the Weld,” in Lasers in Manufacturing 2003, Munich, Germany, 2003, pp. 241–246.
    2. W. Gref, F. Dausinger, and H. Hügel, “Focus-Matrix: Comparing Mono-Focus and Multi-Focus Welding with YAG-Lasers,” in Lasers in Manufacturing 2003, Munich, Germany, 2003, p. 38.
    3. A. Ruf, P. Berger, F. Dausinger, and H. Hügel, “Continuous multi-phase modeling of laser ablation with short pulses,” in Lasers in Manufacturing 2003, Munich, Germany, 2003, pp. 357–362.
  13. 2001

    1. G. Ambrosy, D. Lindenau, P. Berger, and H. Hügel, “Effects of Magnetically Supported Laser Beam Welding of Aluminium Alloys,” in Lasers in Manufacturing 2001, Munich, Germany, 2001, p. 416.
    2. F. Dausinger, “Femtosecond Pulses for Medicine and Production Technology - Overview of a German National Project,” in Lasers in Manufacturing 2001, Munich, Germany, 2001, p. 392.
    3. H. Hügel, “Modeling, Simulation and Process Monitoring - Introduction to session 2,” in Lasers in Manufacturing 2001, Munich, Germany, 2001, p. 75.
    4. S. M. Klimentov et al., “The role of plasma in ablation of materials by ultrashort laser pulses,” in Lasers in Manufacturing 2001, Munich, Germany, 2001, p. 273.
    5. U. Kutschera, G. Chromik, and J. Arnold, “Laser Hybrid Joining of Magnesium Alloys,” in Lasers in Manufacturing 2001, Munich, Germany, 2001, p. 427.
    6. M. G. Müller et al., “An Online Monitoring System Validated by Visualization of Laser Welding Phenomena,” in Lasers in Manufacturing 2001, Munich, Germany, 2001, p. 155.
    7. J. Radtke, “Helical Drilling of High Quality Micro Holes in Steel an Ceramics with Short and Ultrashort Pulsed Lasers,” in Lasers in Manufacturing 2001, Munich, Germany, 2001, p. 331.
    8. A. Ruf et al., “Modeling and experimental analysis of hole formation in laser deep drilling with short and ultra-short pulses,” in Lasers in Manufacturing 2001, Munich, Germany, 2001, p. 214.
    9. A. Strauch, D. Degenhardt, P. Berger, J. Richardt, H. Tiedke, and H. Hügel, “Efficient solution of the inverse problem in laser penetration welding using simulations and experiments,” in Lasers in Manufacturing 2001, Munich, Germany, 2001, p. 227.
    10. R. Xiao, G. Ambrosy, M. Leimser, P. Berger, T. Zuo, and H. Hügel, “Effect of External Current on LAser Beam Welding of Aluminum Alloys with Filler Wire,” in Lasers in Manufacturing 2001, Munich, Germany, 2001, p. 520.
  14. 1996

    1. A. Giesen, U. Brauch, M. Karszewski, C. Stewen, and A. Voß, “New Concepts for High Power Diode Pumped Solid State Lasers,” in Proceedings of the 12th International Congress LASER 95, Munich, Germany, 1996, p. 342.
    2. A. Raiber, F. Dausinger, and H. Hügel, “Mikrostrukturierung von Keramiken im Direct-Write-Verfahren mit Festkörperlasern,” in Proceedings of the 12th International Congress LASER 95, Munich, Germany, 1996, p. 999.
  15. 1994

    1. U. Bethke, F. Dausinger, D. Pähte, F. Trösken, and P. Zopf, “Schweißtechnischer Vergleich zwischen Hochleistungfestkörper- und CO2-Laser,” in Proceedings of the 11th International Congress LASER 93, Munich, Germany, 1994, p. 546.
  16. 1993

    1. P. Berger, “Some Aspects of the Classification of Models in Deep Penetration Welding,” in Proceedings on Modelling of Laser Material Processing, Igls/Innsbruck, Austria, 1993, no. 8th Meeting.
    2. M. Kern and M. Beck, “Absorption simulation of a polarized laser beam at deep penetration welding,” in Proceedings on Modelling of Laser Material Processing, Igls/Innsbruck, Austria, 1993, no. 8th Meeting.
  17. 1992

    1. M. Beck and P. Berger, “Numerical simulation of laser materials processing within the framework of EU 194,” in Proceedings on Modelling of Laser Material Processing, Vienna, Austria, 1992, no. 6th Meeting.
    2. M. Beck, P. Berger, N. Palle, and J. A. Dantzig, “Aspekte der Schmelzbaddynamik beim Laserschweißen mit hoher Bearbeitungsgeschwindigkeit,” in Proceedings of the 10th International Congress LASER 91, Munich, Germany, 1992, pp. 429–434.
    3. M. Beck and M. Danke, “Simplified Modell of Deep Penetration Welding with Two Lasers,” in Proceedings on Modelling of Laser Material Processing, Liverpool, UK, 1992, no. 7th Meeting.
    4. R. Edler and P. Berger, “New nozzle concept for cutting with high power lasers,” in Proceedings of the Laser Materials Processing Symposium ICALEO’91, San Jose (Fl), 1992, vol. LIA Vol. 74 / SPIE Proceedings. Vol. 1722, pp. 253–262.
    5. E. Meiners, F. Dausinger, and M. Wiedmaier, “Micro machining of hard materials using Nd:YAG laser,” in Proceedings of the 10th International Congress LASER 91, Munich, Germany, 1992, p. 284.
    6. U. Schreiner-Mohr, F. Dausinger, and H. Hügel, “New aspects of cutting with CO2-lasers,” in Proceedings of the Laser Materials Processing Symposium ICALEO’91, San Jose (Fl), 1992, vol. LIA Vol. 74 / SPIE Proceedings. Vol. 1722, pp. 263–272.
    7. R. Wahl, F. Dausinger, E. Dalibor, A. Kolb, and M. Menzer, “Gezielte Nachführung der linearen Polarisation beim räumlichen CO2-Laserstrahlschneiden und -schweißen von Karosserieblech,” in Proceedings of the 10th International Congress LASER 91, Munich, Germany, 1992, p. 390.
  18. 1990

    1. M. Bea, S. Borik, and A. Giesen, “Adaptive Optik für CO2-Hochleistungslaser,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, p. 446.
    2. M. Beck, F. Dausinger, and H. Hügel, “Modell zur Beschreibung der Energieeinkopplung von CO2-Laserstrahlung beim Tiefschweißen,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, p. 550.
    3. P. Berger, M. Herrmann, and H. Hügel, “Untersuchungen von Laserschneiddüsen,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, pp. 630–634.
    4. F. Dausinger, R. Edler, U. Schreiner, E. Bächle, and K. Riehle, “Geschwindigkeitsbegrenzende Faktoren beim Laserstrahlschneiden von schwer trennbaren metallischen Werkstoffen,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, p. 605.
    5. A. Giesen and R. W. Serchinger, “Absorptionsmessungen an optischen Komponenten und zwei Stahllegierungen bei 10,6 µm,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, p. 466.
    6. A. Holzwarth, K. Grünewald, and P. Berger, “Zweidimensionale Berechnung der Ausbreitung von Dichtestörungen in gepulsten Hochleistungslasern,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, pp. 17–21.
    7. R. Paul, A. Giesen, and M. von Borstel, “Anpassung hochfrequenzangeregter Laser an die Energieversorgung,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, p. 71.
    8. M. von Borstel, A. Giesen, and R. Paul, “Zündverhalten von hochfrequenz-angeregten CO2-Lasern,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, p. 424.
    9. H. P. Wagner, S. Borik, and A. Giesen, “Änderung der Eigenschaften optischer Komponenten bei Bestrahlung,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, p. 789.
    10. R. Wahl, W. Bloehs, and F. Dausinger, “Genauigkeitsanforderungen beim Laserstrahlschweißen mit Industrierobotern,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, p. 558.
    11. T. Wahl and F. Dausinger, “Tiefschweißen mit gepulstem CO2-Laserstrahl,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, p. 539.
    12. U. Zoske, A. Giesen, and H. Hügel, “Strahlformung von CO2-Laserstrahlung,” in Proceedings of the 9th International Congress LASER 89, Munich, Germany, 1990, p. 98.
  19. 1989

    1. M. Beck and F. Dausinger, “Modelling of laser deep welding processes,” in European Scientific Laser Workshop on Mathematical Simulation, Lissabon, Portugal, 1989, pp. 201–216.
    2. A. Holzwarth, K. Grünewald, P. Berger, and H. Hügel, “Two-Dimensional Time Dependent Modelling Of Density Perturbations In CO2 And Excimer Lasers,” in Seventh International Symposium on Gas Flow and Chemical Lasers, Vienna, Austria, 1989, vol. 1031, doi: 10.1117/12.950548.
  20. 1987

    1. P. Berger, R. Holtbecker, A. Holzwarth, and H. Hügel, “Dichteschwankungen in gepulsten CO2-Hochleistungslasern,” in Proceedings of the 8th International Congress LASER 87, Munich, Germany, 1987, pp. 317–320.
    2. A. Giesen, S. Borik, U. Schreiner, and F. Dausinger, “Vermessung fokussierender Systeme für Hochleistungs-CO2-Laser,” in Proceedings of the 8th International Congress LASER 87, Munich, Germany, 1987, p. 483.
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