| 摘要 |
LASER TREATMENT OF ELECTRICAL STEEL AND OPTICAL SCANNING ASSEMBLY THEREFOR Apparatus for scanning a continuous wave Nd:YAG laser beam (3) across a moving strip (1) of grain oriented silicon steel having an insulative coating to subdivide the magnetic domains of the strip to improve core loss without damage to the insulative coating. The laser beam (3)is scanned by a multiple-faced rotating mirror (9) and focused onto the strip surface by a flat field lens (12) and cylindrical lens (14) to produce a scan line of narrow width having the required irradiation energy, dwell time and line spacing at the surface of the moving strip. |
