Technische Universitāt Wien

Upnano Gmbh

Peter Gruber

Aleksandr Ovsianikov

Robert Liska

Jürgen Stampfl

Christian Windischberger

Zoltan Nagy

Michael Scheucher

In a method for lithography-based generative production of three-dimensional components, in which material that can be solidified under the effect of electromagnetic radiation is arranged in a vat, a build platform is positioned at a distance from the vat bottom, material located between the build platform and the vat bottom is irradiated at selected locations with the aid of an irradiating unit, the electromagnetic radiation is introduced into the material from below through a vat bottom that is transmissive to the radiation, at least in a certain region, and successively focused on focal points within the material, whereby a volume element of the material that is respectively located at the focal point is solidified. The solidification takes place by means of multiphoton absorption and the volume of the focal point is varied at least once during the method, and so the component is built up from solidified volume elements of different volumes.

Method for lithography-based generative production of three-dimensional components

A method of producing a test body for diffusion tensor imaging, which comprises a plurality of channels in a structuring material, the channels preferably having a maximum cross-section of 625 μm, wherein a virtual model of the test body is created and the virtual model is fed to a structuring device which produces the test body by means of a 3D printing-based, in particular lithography-based, structuring process, the structuring process being designed as a multiphoton lithography process, in particular as a multiphoton absorption process, in which the structuring material containing a photosensitizer or photoinitiator is irradiated in a location-selective manner, wherein the radiation is successively focused on focal points lying within the structuring material, resulting in that in each case a volume element of the material located in the focal point is subjected to a change in state by means of a photochemical reaction as a result of multiphoton absorption.

Method of producing a test body for diffusion tensor imaging

In a method for the lithography-based generative production of a three-dimensional component, in which electromagnetic radiation emitted by an irradiation device is successively focused on focal points within a material, wherein in each case a volume element of the material located at the focal point is solidified by means of multiphoton absorption, wherein a substructure is each built up from the volume elements in a writing area of the irradiation device, the build-up of the component comprises the following steps: a) a plurality of substructures are arranged next to one another, then b) substructures are arranged one above the other so that upper substructures bridge the interface(s) between lower substructures arranged next to one another.

Method for the lithography-based additive manufacturing of a three-dimensional component

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Peter Gruber