Abstract:
PROBLEM TO BE SOLVED: To provide one or more optical attenuator elements that are symmetrical about the center line of a beam and that exist in a central part of the beam. SOLUTION: The 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. 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. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an optical attenuator having one optical attenuator element or a plurality of optical attenuator elements arranged symmetrically to a center line of a beam and in a central part of the beam. SOLUTION: The optical attenuator device operates to remove a part of a beam of radiation having intensity higher than average intensity by using at least one optical attenuator element. The device has applications 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. COPYRIGHT: (C)2009,JPO&INPIT
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.
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.