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    METHOD AND DEVICE FOR CHARACTERIZING AN ELECTRON BEAM
    13.
    发明申请
    METHOD AND DEVICE FOR CHARACTERIZING AN ELECTRON BEAM 审中-公开

    公开(公告)号：US20170294288A1

    公开(公告)日：2017-10-12

    申请号：US15630199

    申请日：2017-06-22

    Applicant: Arcam AB

    Inventor： Tomas Lock

    IPC: H01J37/304 ,  H01J37/244 ,  H01J37/30 ,  B29C67/00 ,  H01J37/09 ,  B23K15/00 ,  B33Y40/00 ,  B28B1/00 ,  G01T1/29 ,  H01J37/305

    Abstract: A device for detecting X-rays radiated out of a substrate surface, said device comprising at least one X-ray detector, a resolver grating and a modulator grating, said resolver grating with at least one opening facing towards said X-ray detector is arranged in front of said X-ray detector. Said modulator grating is provided between said resolver grating and said substrate at a predetermined distance from said resolver grating and said substrate, where said modulator grating having a plurality of openings in at least a first direction, wherein said x-rays from said surface is spatially modulated with said modulator grating and resolver grating.

    Apparatus for fusing a workpiece
    17.
    发明授权
    Apparatus for fusing a workpiece 有权

    公开(公告)号：US11084098B2

    公开(公告)日：2021-08-10

    申请号：US16052365

    申请日：2018-08-01

    Applicant: Arcam AB

    Inventor： Johan Backlund ,  Tomas Lock

    IPC: B22F10/20 ,  B23K26/064 ,  B33Y30/00 ,  B23K26/06 ,  B23K26/073 ,  G02B27/09 ,  B29C64/153 ,  B33Y10/00 ,  B33Y50/02 ,  B23K15/00 ,  B28B1/00 ,  B28B17/00 ,  B23K26/342 ,  B23K26/70 ,  B23K15/02 ,  B22F10/30 ,  B29K105/00

    Abstract: Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.

    APPARATUS, METHOD, AND COMPUTER PROGRAM PRODUCT FOR FUSING A WORKPIECE
    18.
    发明申请
    APPARATUS, METHOD, AND COMPUTER PROGRAM PRODUCT FOR FUSING A WORKPIECE 审中-公开

    公开(公告)号：US20180345377A1

    公开(公告)日：2018-12-06

    申请号：US16040841

    申请日：2018-07-20

    Applicant: ARCAM AB

    Inventor： Johan Backlund ,  Tomas Lock

    IPC: B22F3/105 ,  B23K26/073 ,  B23K26/06 ,  B33Y30/00 ,  B33Y50/02 ,  B23K15/00

    Abstract: Provided is an apparatus that includes a high energy beam configured to make a first weld at a first position on a workpiece; at least one deflection lens configured to deflect the high energy beam so as to cause the high energy beam to make a second weld at a second position; at least one focusing lens configured to focus the high energy beam; at least one astigmatism lens; and at least one controller. The controller is configured to shape the high energy beam so that the shape of the high energy beam on the workpiece is longer in a direction parallel to a deflection direction of the high energy beam than in a direction perpendicular to the deflection direction of the high energy beam. A length ratio is varying as a function of the power of the energy beam, while the width in the perpendicular direction is constant.

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