Abstract:
A laser processing device in which even a short nozzle provided with a follower roller (35) can prevent disturbance of a laser beam and contamination of protective glass and in which shield gas can act effectively. The laser processing device comprises a head section (11) from which a laser beam that is condensed by a condenser lens (16) provided inside the device is irradiated through a nozzle section (13); a gas delivery means (28) opened in a processing direction X, in the vicinity of the focal point of laser beam, and jetting a shield gas from the opening; a primary air delivery means (31) directed in the processing direction X, above the focal point F of the laser beam, and jetting primary air A1 substantially in the horizontal direction to form a first air curtain; and secondary air delivery means (18, 13, 19) directed to the focal point from the vicinity of the condenser lens and jetting secondary air A2 to form a second air curtain.
Abstract:
An apparatus for processing hard materials comprises a laser (10) which generates high repetition rate, high irradiance laser pulses which are scanned onto a material using a scanner (20) for laser milling or laser cutting applications.
Abstract:
Verfahren und Vorrichtung zur Materialbearbeitung mit Laserimpulsen großer spektraler Bandbreite und Vorrichtung zur Durchführung des Verfahrens. Es war ein Verfahren zu schaffen, mit dem möglichst aufwandgering, flexibel und universell anwendbar Bearbeitungswirkungen ermöglicht werden, die jeweils spezifisch hinsichtlich Bearbeitungsaufgabe und Prozessverlauf festgelegt und angepasst werden können. Erfindungsgemäß werden für den Materialbearbeitungsprozess bzw. währenddessen ein oder mehrere spektrale Parameter der Laserimpulse, d. h. deren spektrale Amplitude und/oder die spektrale Phase und/oder die spektrale Polarisation, gezielt verändert, vorzugsweise in Abhängigkeit einer Messgröße aus dem Bearbeitungsprozess. Die Erfindung wird verwendet zur Materialbearbeitung mit Laserimpulsen großer spektraler Bandbreite, insbesondere mit Femtosekunden- und Pikosekundenimpulsen.
Abstract:
The present invention relates to an apparatus (1) for generating a rotating laser beam (5) which may used for various applications including welding, cutting, drilling or ablation of materials. More particularly, the apparatus according to the present invention is able to produce a fast rotating and accurate laser beam, because the main optical device (100) that is rotated consists of a first reflecting surface (102) rotating about an axis (X1) at least a second reflecting surface (26), said first reflecting surface (102) intented to redirect said laser beam into the direction of the second reflecting surface (26), and a rotating lens (107) of optical axis (X2) arranged to be tiltable, such that said optical axis (X2) is able to be angled with respect to said axis (X1).
Abstract:
Zum Schneiden von Textilien, die aus Kunststoffasern bestehen oder einen Anteil an Kunststoffasern aufweisen, wie beispielsweise Airbagmaterialien, ist ein Laserstrahl (24) als Schneidwerkzeug vorgesehen, der von einer Laserquelle (22) über eine Aufweitoptik (26) und zwei nachfolgende, Umlenkspiegel (28, 29) antreibende Galvanometer-Scanner (32, 34) auf den Textilstoff (30) fokussiert wird. Die Aufweitoptik (26) ist über eine motorisch angetriebene Linsenverschiebung mit einer variablen Brennweite ausgestattet, die dafür sorgt, dass bei Auslenkung des Laserstrahls über die Gavanometer-Scanner der Brennpunkt stets auf der durch den Textilstoff (30) definierten Schneidebene liegt. Die Galvanometer-Scanner sind mit Spiegeln (28, 29) ausgestattet.
Abstract:
A pulse oscillation solid−state laser apparatus includes a laser apparatus main body using as an excitation source a laser diode emitting a beam in a main energy absorption band of a solid−state laser active medium. Prior to emitting a laser beam outside the laser apparatus main body, a calibration of a pulse laser output value is performed by applying several types of rectangular pulse current values defined in the apparatus, to the laser diode, so that the laser apparatus main body performs pulse oscillation. An average laser output value of each of the rectangular pulse current values is measured by using a laser output measurement instrument provided in the laser apparatus main body. After the average output value data is determined, when a laser output beam is outputted outside the laser apparatus main body, a pulse current value linearly predicted in accordance with the determined average output value data is applied to the laser diode, thereby determining a desired pulse laser output value.
Abstract:
A precision, laser-based high-speed, sequential processing of material of targets within a field are disclosed that control the irradiation distribution pattern of imaged spots. For each spot, a laser beam is incident on a first anamorphic optical device (125) so that the beam (120) is controllably modified into an elliptical irradiance pattern. The modified beam (128) is propagated through a scanning optical system with an objective lens to image a controlled elliptical spot on the target.
Abstract:
A desired pattern may be cut into a stent preform by impinging a laser beam onto the stent preform. The laser beam is formed using a laser system comprising a resonator cavity for resonating laser radiation, a gain medium contained in the resonator cavity, a pump for periodically pumping the gain medium and an electro-optical modulator in communication with the resonator cavity. The laser system produces a radiation pulse for each pump period. Each radiation pulse is modulated with the electro-optical modulator to produce a pulse train of ordered pulses of radiation. Each pulse train is output from the optical cavity as an output laser beam which is directed at the stent preform to cut a desired pattern in the stent preform.
Abstract:
La présente invention concerne un dispositif de fabrication d'un cliché d'impression pour l'imprimerie faisant intervenir une phase de gravure au laser sur une couche polymérisée d'un support, caractérisé en ce qu'il comprend au moins deux faisceaux (5n) de longueurs d'onde différentes distribués par au moins une source laser (1), dont au moins l'un des faisceaux opère dans l'infrarouge afin de graver la surface du polymère (4) à grande vitesse et moyenne résolution et au moins l'autre faisceau opère dans l'ultraviolet afin de graver à haute résolution.