3.
    发明专利
    未知

    公开(公告)号:DE602004015713D1

    公开(公告)日:2008-09-25

    申请号:DE602004015713

    申请日:2004-12-21

    Abstract: An optical attenuator device operates to remove a part of a beam of radiation having a higher than average intensity using at least one optical attenuator element (4). The device has application in a radiation system, and/or a lithographic apparatus, in particular a scanning lithographic apparatus, wherein the optical attenuator element(s) are provided in a central part of the beam, for example perpendicularly to a scanning direction.

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