| 摘要 |
To ensure that a laser beam is not disturbed during its transmission for the laser generator to a laser cutting head, the laser beam is conveyed along a beam guide enclosure. One side of the beam guide has an opening channel which is covered by a cover sheet that is slidably movable along substantially the length of the open channel. An aperture is formed on the cover sheet, and a conduit connects the aperture to the laser cutting head assembly. A reflective mirror is mounted relative to the conduit and is movable along the axis of the laser beam so as to intercept the laser beam and reflect it through the conduit to the laser cutting head assembly. The cover sheet is made of a flexible material that is impervious to either the laser beam itself or the heat generated by the laser beam. Rollers are provided at both ends of the cover sheet to from respective coils of the cover sheet so as to take up any slack. The cover sheet is slidably moved along the open channel of the beam guide due to the aperture being moving in lockstep with the movement of the laser cutting head assembly.
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