LASER SCRIBING INSTALLATION FOR SURFACE TREATMENT OF MAGNETIC SHEETS WITH SPOTS WITH ELLIPTIC SHAPE Russian patent published in 2014 - IPC B23K26/08 B23K26/36 

FIELD: physics, optics.

SUBSTANCE: invention relates to treating magnetic sheets with a directed structure in form of a strip (26) in the direction of longitudinal movement by laser scribing. The installation (22) includes a laser generator for a laser beam (46a, 46b), a cylindrical telescopic optical system (38a, 38b) with varying focal distance for the formation of a laser beam (49a, 49b) with an elliptic section having varying ellipticity as function of the focal distances and a rotating mirror scanner (39a, 39b) for moving the laser beam to a given angle. A parabolic reflector (54) of the installation is placed across the strip (26) for receiving the scanning laser beam (51a, 51b) and focusing the beam on the strip (26) in form of an elongated elliptic spot (53a, 53b), along a treatment path. The telescopic system (38a, 38b) is adjustable to change the length of one of the axes of the laser beam (52a, 52b) with an elliptic shape incident on the strip (26).

EFFECT: reduced processing losses by scribing areas with a small cross-section and maximum penetration.

20 cl, 14 dwg