PROCESS AND DEVICE OF CUTTING AND/OR WELDING AND/OR MARKING BODIES WITH A LASER BEAM FOCUSED BY A CYLINDRICAL PARABOLIC MIRROR

The present invention respects to a device and to a process of cutting and/or welding and/or marking bodies (3), at high speed and of long range, namely for plastic films, using laser technology. The process and the device use a beam (1) of coherent radiation, namely a laser beam, that sweeps the bo...

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Bibliographische Detailangaben
Hauptverfasser:	PAULO JORGE DE AZEVEDO LOPES DOS SANTOS, JORGE LEITE MARTINS DE CARVALHO, MARGARIDA MARIA MOREIRA CALEJO PIRES, ANTONIO MANUEL DOS ANJOS DE OLIVEIRA
Format:	Patent
Sprache:	eng ; por
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CLADDING OR PLATING BY SOLDERING OR WELDING COLOUR PRINTING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING LINING MACHINES MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PERFORMING OPERATIONS PHYSICS PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SOLDERING OR UNSOLDERING STAMPS TRANSPORTING TYPEWRITERS WELDING WORKING BY LASER BEAM WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The present invention respects to a device and to a process of cutting and/or welding and/or marking bodies (3), at high speed and of long range, namely for plastic films, using laser technology. The process and the device use a beam (1) of coherent radiation, namely a laser beam, that sweeps the body(ies) (3) to be worked and that is focused on them by means of a focusing device (23) placed downwards from the source (0) of the said radiation, and are characterized in that the focusing element (23) is constituted by a cylindrical parabolic mirror (23) that is placed immediately upwards from the cited body(ies) (3) and that is swept by the said beam (0) accordingly to a direction substantially parallel to the one of a generatrix of said mirror (23). The cylindrical parabolic mirror may have only one cylindrical parabolic surface (231) or more and these may be approximated by elliptical surfaces, cylindrical or others. The beam sweeps the parabolic mirror (23) by the action of a rotating mirror (21) .