摘要:
A method of blackening a surface, comprises applying laser radiation to the surface of a target (10) to produce a periodic arrangement of structures on the surface of the target (10), wherein the laser radiation comprises pulsed laser radiation comprising a series of laser pulses and the power density of the pulses is in a range 2 GW/ cm 2 to 50 GW/cm 2 or 0.1 TW/cm 2 to 3 TW/cm z , and/or a pulse duration between 200 femtoseconds to 1000 picoseconds.
摘要:
An apparatus for surface modification includes a support to hold a workpiece, a plasma source to generate a plasma in a localized region that is smaller than the workpiece, and a six-axis robot to manipulate relative positioning of the workpiece and the plasma source. The six-axis robot is coupled to at least one of the support and the plasma source.
摘要:
A method of scribing abrasion aesthetics, patterns, images, serial numbers, ply markings and/or other information, such as sizing or care information, on fabric such as denim, before or during the fabric cutting process is provided. The method comprises loading the panel abrasion software, pattern marker software, and fabric scribing software; placing the fabric on a flat surface under at least one laser; laser scribing ply numbers, serial labels, fabric markers, and panel abrasions on the fabric; cutting the fabric into fabric lengths; spreading the pre-abraded and pre-marked fabric lengths on top of each other to create multiple plies in precise alignment; cutting shaped panels along the lines of the pattern marker with a conventional knife, laser, or other appropriate cutting tool; and stacking the abraded, labeled and shaped panels robotically or manually for sewing.
摘要:
On soumet une partie au moins de la pièce à une première étape selon laquelle on déplace au moins un faisceau laser selon au moins une passe sur ladite partie, jusqu'à transformation partielle ou totale de la couche superficielle de la partie considérée et modification de la répartition de la concentration de l'azote dans la zone de diffusion, On soumet la partie au moins traitée par laser pour transformer la couche superficielle, à une deuxième étape selon laquelle on déplace au moins un faisceau laser selon au moins une passe sur ladite partie pour permettre de réduire la concentration d'azote dans la couche de diffusion sous-jacente.
摘要:
The present disclosure is directed to methods and systems for processing a thin film. An exemplary method can include irradiating a first region of the thin film with a first laser pulse with a first energy density sufficient to partially melt the first region and cause crystal grain lateral growth from a seed region within the first region after the first laser pulse and irradiating the first region of the thin film with at least one sequential laser pulse with a time interval after the first laser pulse and a second energy density sufficient to delay crystal nucleation and extend lateral crystal growth within the first region without partially melting the film.
摘要:
A laser emitter (36) emits a laser beam (37) through optics (38) that focus the beam, and a beam deflection device (40) redirects the beam. An elongated probe (30) receives the beam at a proximal end (50) and has a remote mirror (24) that reflects the beam toward a hidden surface (32) to be processed by scanning of the beam. A programmable controller (54) controls focusing and deflection of the beam to move the focal point and spot of incidence (39) in three dimensions, causing the spot to traverse the hidden surface. The probe may optionally have translation (42) and rotation (44) actuators and a remote mirror pivot actuator (58) controlled by the controller. The probe may be L-shaped (30A, 30B) to reach around an intervening structure (27). An autofocus mechanism (67) may be provided to focus the beam during scanning or verify focus profiles before scanning.
摘要:
Various methods for laser welding biocompatible material for use in implantable medical devices are disclosed. A method for laser processing includes applying a laser beam to a biocompatible material comprising at least 85% by weight zirconium oxide (ZrO2) or "zirconia" in an oxygen-free environment and depleting the material of oxygen. The depletion of oxygen converts the zirconium oxide to elemental zirconium at an interface where the material is applied to the elemental zirconium. In one embodiment, the present invention provides for an implantable medical device or component thereof made of a biocompatible material comprising zirconium oxide. The device includes a substrate that has an intrinsic conductive pathway comprising elemental zirconium that extends from a first surface to a second surface of the substrate.