Laser scribing installation for the superficial treatment of magnetic sheets with spots of elliptic section

A laser scribing installation (22) for the treatment of grain oriented magnetic sheets, as strip (26) in longitudinal movement, comprising a laser generator for a laser beam (46a, 46b), a cylindrical telescopic optical group (38a, 38b) with varying focal distance for the formation of a laser beam wi...

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Bibliographische Detailangaben
Hauptverfasser: PENASA MAURO, BAISTROCCHI MAURIZIO, SAVANT-AIRA GIUSEPPE, BAISTROCCHI MATTEO, MARIOTTI FERRUCCIO
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:A laser scribing installation (22) for the treatment of grain oriented magnetic sheets, as strip (26) in longitudinal movement, comprising a laser generator for a laser beam (46a, 46b), a cylindrical telescopic optical group (38a, 38b) with varying focal distance for the formation of a laser beam with elliptic section (49a, 49b) having varying ellipticity as function of the focal distances and a rotating mirror scanner (39a, 39b) for scanning the laser beam accord ing to a pre-defined angle. The scribing installation (22) further comprises a parabolic reflector (54) extended transversally to the strip (26), for receiving the scanned laser beam (51 a, 51 b) and focusing the beam on the strip (26), as a greatly lengthened elliptic spot (55), along a treatment path (53a, 53b), and in which the telescopic group (38a, 3b) is adjustable for modifying the length of one of the axes in the elliptic section of the laser beam (52a, 52b) incident on the strip (26).