Browsing by Subject "Feixos de làser"

Now showing items 1-7 of 7

    • Cost-effective microfabrication of sub-micron-depth channels by femto-laser anti-stiction texturing 

      Karimi, Shadi; Mehrdel, Pouya; Casals Terré, Jasmina; Farré Lladós, Josep (2020-02-26)
      Article
      Open Access
      Micro Electro Mechanical Systems (MEMS) and microfluidic devices have found numerous applications in the industrial sector. However, they require a fast, cost-effective and reliable manufacturing process in order to compete ...

    • Flat focusing mirrors 

      Staliunas, Kestutis; Cheng, Yu-Chiech; Kicas, Simonas; Trull Silvestre, José Francisco; Cojocaru, Crina; Peckus, Martynas; Vilaseca Alavedra, Ramon; Drazdys, Ramutis (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      We present the flat focusing mirror - the dielectric mirrors capable to focus and image the narrow beams in reflections. The mirrors are flat, and transversally invariant, i.e. have no optical axis. We consider two different ...

    • Influence of laser beam power and scanning speed on the macrostructural characteristics of AISI 316L and AISI 431 stainless steel depositions produced by laser cladding process 

      Figueredo, Erike; Apolinario, Luis; Santos, Mayara; Silva, Ana; Ávila Díaz, Julián Arnaldo; Lima, Milton; Santos Felipe, Tiago (2021-04-05)
      Article
      Open Access
      In the laser cladding process, control of the process parameters and knowledge of the characteristics of the materials used are essential for obtaining depositions with excellent metallurgical union, satisfactory dilution ...

    • Schädigungsparameter für Laserstrahlschweißverbindungen unter zyklischen, mehraxialen Belastungen 

      Barrabino Clemente, Marta (Universitat Politècnica de Catalunya / Technische Universität Darmstadt, 2011)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      In der Automobil- und Luftfahrtbranche werden Laserstrahlschweißverbindungen häufig benutzt. Die Technologie erlaubt eine effektive Verbindung dünnwandiger Leichtbaukonstruktionen. Bei schneller Fertigung ermöglicht sie ...

    • Study of femtosecond laser beam focusing in a direct-write system 

      Van Eeckhout Alsinet, Albert (Universitat Politècnica de Catalunya, 2016-07-22)
      Master thesis
      Open Access
      Direct-write techniques appear as a versatile option in rapid-prototyping applications because they can directly transfer a custom pattern from a digital file. Lasers are a distinguished tool which allow to perform non-contact ...

    • Study of heat sources interacting in integrated circuits by laser mirage effect 

      Perpiñà Gilabet, Xavier; Jordà, Xavier; Vellvehi, Miquel; Altet Sanahujes, Josep (2014-08-25)
      Article
      Restricted access - publisher's policy
      This work exploits the mirage effect to analyze multiple heat sources thermally interacting in an integrated circuit (IC) by means of a probe IR laser beam, which strikes on the die lateral walls and passes through the die ...

    • Super-collimation by axisymmetric diffractive metamirror 

      Gailevicius, Darius; Grineviciute, Lina; Peckus, Martynas; Staliunas, Kestutis; Taranenko, Victor (2021-08-05)
      Article
      Restricted access - publisher's policy
      We propose and demonstrate experimentally super-collimation of light beams by an axisymmetric diffractive metamirror—an axisymmetric concentric dielectric ring structure positioned in front of a mirror at a distance of ...