| 摘要 |
<p>An apparatus for laser beam targeting and method of laser cutting or marking of an article is disclosed. In one aspect of the invention, the laser beam targeting apparatus comprises at least one laser scan head comprising at least one motor driven deflector for scanning a linearly polarized laser beam across a target, and a polarization control device comprising at least one Brewster plate wherein the polarization control device rotates the Brewster window around an axis parallel to the laser beam to thereby gradually transmit or deflect the laser beam in order to control the level of laser beam energy scanning across the target in accordance with the movement of the at least one deflector and a laser scanner. In another aspect of the invention, an article for laser cutting or marking is processed by at least one laser scan head comprising at least one motor driven deflector for scanning a linearly polarized laser beam across the article, and a polarization control device which rotates at least one Brewster plate around an axis parallel to the laser beam to gradually transmit or deflect the laser beam to control the level of laser beam energy scanning across the article in accordance with the movement of the at least one deflector.</p> |
