| 摘要 |
A protective window assembly (2) and its use with a focusing lens in a laser beam generating apparatus to protect the focusing lens against contamination and the like. A protective window assembly (2) includes a housing (4) defining a cavity (6) for receiving the protective window (8). The cavity is defined by opposed walls (10 and 12) of the housing (4) and a flange (14) against which the protective window (8) rests when secured within the cavity (6). The housing (4) has a forward end (16) and a rearward end (18). The forward end (16) is positioned in proximity to the target (e.g. workpiece) which is contacted by the laser beam. Protective gaskets (22) may be provided. Set screws (20) are provided to secure the protective window assembly (2) to the assembly containing the focusing lens.
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