@article{AdelmannHellmann2013, author = {Adelmann, Benedikt and Hellmann, Ralf}, title = {Process optimization of laser fusion cutting of multilayer stacks of electrical sheets}, series = {International Journal of Advanced Manufacturing Technology}, volume = {68}, journal = {International Journal of Advanced Manufacturing Technology}, pages = {2693 -- 2701}, year = {2013}, subject = {Laserschneiden}, language = {en} } @inproceedings{HasenstabAdelmannHellmann2013, author = {Hasenstab, Stefan and Adelmann, Benedikt and Hellmann, Ralf}, title = {Laser Cutting of Alumina and Aluminum Nitride with a 500 W Single Mode Fiber Laser}, series = {XXVII. microCAD International Scientific Conference}, booktitle = {XXVII. microCAD International Scientific Conference}, year = {2013}, subject = {Laserschneiden}, language = {en} } @article{AdelmannHuernerSchlegeletal.2013, author = {Adelmann, Benedikt and H{\"u}rner, Andreas and Schlegel, Tobias and Bauer, Anton and Frey, Lothar and Hellmann, Ralf}, title = {Laser Alloying Nickel on 4H-Silicon Carbide Substrate to Generate Ohmic Contacts}, series = {Journal of Laser Micro/Nanoengineering}, volume = {8}, journal = {Journal of Laser Micro/Nanoengineering}, number = {1}, pages = {97 -- 101}, year = {2013}, subject = {Ohm-Kontakt}, language = {en} } @article{HuernerSchlegelAdelmannetal.2013, author = {H{\"u}rner, Andreas and Schlegel, Tobias and Adelmann, Benedikt and Mitlehner, Heinz and Hellmann, Ralf and Bauer, Anton and Frey, Lothar}, title = {Alloying of Ohmic Contacts to n-type 4H-SiC via Laser Irradiation}, series = {Materials Science Forum}, volume = {740-742}, journal = {Materials Science Forum}, pages = {773 -- 776}, year = {2013}, subject = {Ohm-Kontakt}, language = {de} } @inproceedings{KalmarHellmannRegertetal.2011, author = {Kalm{\´a}r, L{\´a}szl{\´o} and Hellmann, Ralf and R{\´e}gert, Tam{\´a}s and Varga, Zoltan}, title = {Numerical simulation of heat transfer procedure in high power LED modules}, series = {Proceedings of the 12th technical and scientific meeting}, booktitle = {Proceedings of the 12th technical and scientific meeting}, pages = {18 -- 20}, year = {2011}, subject = {Lumineszenzdiode}, language = {en} } @article{BelleScheurichHellmannetal.2010, author = {Belle, Stefan and Scheurich, Steffen and Hellmann, Ralf and So, Sik and Sparrow, Ian and Emmerson, Greg}, title = {Refractive index sensing for online monitoring water and ethanol contents in biofuels}, series = {Sensors}, journal = {Sensors}, number = {7726}, issn = {1424-8220}, doi = {10.1117/12.853849}, year = {2010}, subject = {Biokraftstoff}, language = {en} } @inproceedings{GlaabHellmann2010, author = {Glaab, Johannes and Hellmann, Ralf}, title = {Small-scale low-through UV-C LED disinfection device, in waste processing and recycling}, series = {Proceedings of the XXIV international Scientific conference Miskolc, Ungarn}, booktitle = {Proceedings of the XXIV international Scientific conference Miskolc, Ungarn}, year = {2010}, subject = {Lumineszenzdiode}, language = {en} } @article{GockelEngelHellmann2011, author = {Gockel, Tilo and Engel, Michael and Hellmann, Ralf}, title = {3D Laserscanning mit Linienlaser und Smart Camera - Systemauslegung mit Rasterlinsenoptik und Scheimpflugentzerrung}, series = {Elektor Sonderheft LEDs 3}, journal = {Elektor Sonderheft LEDs 3}, number = {9}, pages = {79 -- 84}, year = {2011}, subject = {Laserscanner}, language = {de} } @article{SchneiderBochtlerHellmannetal.2011, author = {Schneider, Johannes and Bochtler, Ulrich and Hellmann, Ralf and Kaloudis, Michael and Gockel, Tilo}, title = {Effiziente Entw{\"a}rmung eines Hochleistungs-UV-LED-Moduls}, series = {Elektor, Sonderheft LEDs 3}, volume = {2011}, journal = {Elektor, Sonderheft LEDs 3}, number = {9}, pages = {12 -- 17}, year = {2011}, subject = {Lumineszenzdiode}, language = {de} } @inproceedings{HeilmannHellmann2011, author = {Heilmann, Eva-Maria and Hellmann, Ralf}, title = {Water jet guided laser cutting using a green disc laser}, series = {Proceeding XXV microCAD, International scientific conference, 2011, Section K: Material science/Material processing technologies}, booktitle = {Proceeding XXV microCAD, International scientific conference, 2011, Section K: Material science/Material processing technologies}, year = {2011}, subject = {Wasserstrahlschneiden}, language = {en} }