Arcam Ab

Radians Innova Ab

Micronic Laser Systems Ab

Mycronic Ab

Micronic Mydata Ab

Tomas Lock

Johan Backlund

Torbjörn Sandström

Ulf Ackelid

Anders Snis

Morgan Larsson

Lars Stiblert

Björn Löfving

Daniel Jonasson

Jarek Luberek

Mats Hagberg

Kennet J Vilhelmsson

Bengt Kleman

Tomas Berg

Markus Ramsperger

Devices, systems, and methods for calibrating for an electron beam additive manufacturing system. The electron beam manufacturing system includes electron beam guns. A calibration system includes an optical pyrometer. The optical pyrometer captures thermal radiation emitted from raw material. An analysis component is communicatively coupled to the optical pyrometer. The analysis component is programmed to determine calibration parameters from information from the optical pyrometer and a phase transition temperature.

Devices, systems, and methods for calibrating and maintaining a temperature of materials in an additive manufacturing build chamber

A device for viewing and/or illuminating a target surface in an evacuated chamber having condensable vapor therein, the device comprising: a first section with a through hole having a first end with a first opening and a second end with a second opening; and a second section having a chamber comprising a first portion with a first opening, a second portion with a second opening and a gas inlet, where the second opening is covered with a first window, said first section is attached with the first end to the first portion of the chamber allowing free passage between the chamber and the first section, said gas inlet is connectable to a gas reservoir for feeding a gas into the chamber for prohibiting the first window in the chamber for being contaminated of the condensable vapor.

Method and device for viewing and/or illuminating a target surface in an evacuated chamber having condensable vapor therein

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 for fusing a workpiece

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.

Apparatus, method, and computer program product for fusing a workpiece

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.

Method and device for characterizing an electron beam

The invention concerns an apparatus () for producing three-dimensional objects () layer by layer using a powdery material which can be solidified by irradiating it with a beam () of charged particles, said apparatus () comprising means for successive application of powder layers to a work table, and a radiation gun () for delivering said beam () of charged particles, wherein the inventive apparatus () comprises a powder-lifting detection device () capable of generating a signal (S) upon detection of lifting of powdery material from the working area ().

Method and apparatus for producing three-dimensional objects

A method is provided for forming a three-dimensional article through successive fusion of parts of a powder bed. The method includes the steps of: applying a first powder layer on a work table; directing an electron beam from an electron beam source over the work table, the directing of the electron beam causing the first powder layer to fuse in first selected locations according to a pre-determined model, so as to form a first part of a cross section of the three dimensional article, and intensity modulating X-rays from the powder layer or from a clean work table with a patterned aperture modulator and a patterned aperture resolver, wherein a verification of at least one of a size, position, scan speed, or shape of the electron beam is achieved by comparing detected intensity modulated X-ray signals with saved reference values.

Method for verifying characteristics of an electron beam

Method and device for characterizing an electron beam using an X-ray detector with a patterned aperture resolver and patterned aperture modulator

The invention concerns a method for producing three-dimensional objects () layer by layer using a powdery material which can be solidified by irradiating it with a beam () of charged particles, which method comprises the following steps: successive application of powder layers to a working area (), and fusing together successive layers of said three-dimensional object () by successively irradiating the powdery layers with said beam (). The invention is characterized in that it comprises the following steps: determining whether lifting of powdery material from the working area () occurs using a powder-lifting detection device (OO) capable of generating a signal (S) upon detection of lifting of powdery material from the working area (), and interrupting the irradiation of at least a part of the working area () where powder lifting occurs using the signal (S) generated by the powder-lifting detection device (O) for automatically trigging the interruption. The invention also concerns an apparatus () for producing three-dimensional objects () layer by layer using a powdery material which can be solidified by irradiating it with a beam () of charged particles, said apparatus () comprising means for successive application of powder layers to a work table, and a radiation gun () for delivering said beam () of charged particles, wherein the inventive apparatus () comprises a powder-lifting detection device () capable of generating a signal (S) upon detection of lifting of powdery material from the working area ().

Patterns are written on workpieces, such as, glass sheets and/or plastic sheets used in, for example, electronic display devices such as LCDs. The workpiece may be larger than about 1500 mm may be used. An optical writing head with a plurality of writing units may be used. The workpiece and the writing head may be moved relative to one another to provide oblique writing.

Writing apparatuses and methods

Devices and methods for manufacturing displays, solar panels and other devices using larger size workpieces are provided. The workpiece is rolled into a cylinder, thereby reducing the physical size by a factor of 3 in one dimension. The stages on which the workpieces are rolled have a cylindrical shape, which allows a more robust and/or compact movement of the glass, reduced machine weight. The workpieces are relatively thin, more flexible, and are rolled onto a cylinder with a diameter of about 1 meter.

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Vaestra Froelunda, Sweden

Tomas Lock