Envisiontec Gmbh

John, Hendrik

Hendrik John

Ali El-Siblani

Alexandr Shkolnik

Volker Schillen

Rolf Mülhaupt

Al Siblani

Ali Siblani

Rüdiger Landers

Ali El-Sibiani

The invention relates to a process or device for the production of a three-dimensional object by layer-wise solidification of a material which is solidifiable under the application of electromagnetic irradiation by means of mask illumination, wherein the mask is produced using an image forming unit having a prescribed resolution, which is formed from a constant number of image forming elements (pixels) being discrete and being arranged in a spatially mutually fixed manner. For the improvement of the resolution along the outer and inner contours of the sectional areas of the object to be generated layer-wise in the sub-pixel range, a multiple illumination per layer is performed, which consists of a series of multiple images that are mutually shifted in the sub-pixel range in the image/construction plane, wherein a separate mask/bitmap is produced for each shifted image.

Process for the production of a three-dimensional object with resolution improvement by 'pixel shift'

The invention describes device and method for producing a three-dimensional object by solidifying a solidifiable material under an action of electromagnetic radiation by means of energy input via an imaging unit comprising a predetermined number of discrete imaging elements (pixels). The energy input related to a specific cross-sectional area of the three-dimensional object is controlled by exposure by means of multiple successive raster masks (bitmaps; e.g. bitmapand bitmapand possibly additional ones). The imaging unit is suitably controllable such that at least two masks can be generated, including a first overall mask covering the cross-sectional area (bitmap; with pixel-specific area elements exposing in white light) and a partial mask (bitmap; in which only a fraction of the area elements are exposed pixel-specifically with white light) within the overall mask. A voxel matrix may be formed. A hardness depth per voxel (volume pixel) can be specifically and precisely influenced in the solidifyable material.

Method for producing a three-dimensional object by means of mask exposure

The invention relates to a process or a device for the production of a three-dimensional object by layer-wise solidification of a photo-polymerizable resin by means of a planar or essentially planar construction/reference plane, at which the photo-polymerizable resin contained in the liquid material is to be hardened by electromagnetic irradiation, and wherein the material application for the subsequent layer automatically results from the separation of the last hardened layer from the construction/-reference plane, whereby the construction/reference plane is formed by an elastic film. The film is fixed in a frame, and the height position of the frame with the film is adjusted in a basin containing the liquid material such that the pressure of the liquid material compensates the sagging of the film (formation of a negative meniscus), and that the lower side of the film is permanently in contact with the material during the whole construction process.

Process for the production of a three-dimensional object with an improved separation of hardened material layers from a construction plane

The invention relates to a process or a device for the production of a three-dimensional object by layer-wise solidification of a material which is solidifiable under the application of electromagnetic irradiation by means of mask illumination, wherein the mask is produced using an image forming unit having a prescribed resolution, which is formed from a constant number of image forming elements (pixels) being discrete and being arranged in a spatially mutually fixed manner. For the improvement of the resolution along the outer and inner contours of the sectional areas of the object to be generated layer-wise in the sub-pixel range, a multiple illumination per layer is performed, which consists of a series of multiple images that are mutually shifted in the sub-pixel range in the image/construction plane, wherein a separate mask/bitmap is produced for each shifted image.

Process for the production of a three-dimensional object with resolution improvement by pixel-shift

Device for producing a three-dimensional object by solidification of a material solidifiable under the action of electromagnetic radiation by means of energy input via an imaging unit comprising a predetermined number of discrete imaging elements (pixels), said device comprising a computer unit, an IC and/or a software implementation respectively with the ability of adjusting and/or controlling the energy input via a specific gray value and/or color value in a voxel matrix.

Device and method for producing a three-dimensional object by means of mask exposure

The invention describes a process and a device for producing at least one three-dimensional object, a photo-polymerizable material is solidified by means of simultaneous or almost simultaneous exposure of a build area or partial build area in a building plane via electromagnetic radiation, wherein a distance between a support plate, at which the object to be generated is built, and the building plane is changed during at least one exposure phase. It is possible according to the invention to solidify the three-dimensional object in a main direction during a radiation phase exceeding a current prescribed hardening depth, without interrupting supply of electromagnetic energy during the irradiation phase. Further, it is possible to control a current hardening depth of the photopolymerizable material during a building phase. Embodiments of suitable devices are also described.

Continuous generative process for producing a three-dimensional object

The invention relates to a method for producing a three-dimensional object by solidification of a material solidifiable under the action of electromagnetic radiation by means of energy input via an imaging unit comprising a predetermined number of discrete imaging elements (pixels), The method comprises performing solidification with exposure using bitmap mask. The bitmap mask may be formed from a stack of bitmap data provided by an overlap analysis of a three-dimensional volume completely or partially enclosing a three-dimensional model of at least a part of the three-dimensional object to be produced. Alternatively, bitmap mask may be formed from a two-dimensional data set comprising overlap information. Solidification may be performing with exposure using bitmap mask generated 'on the fly'. The invention is also directed to devices, and a computer and a data carrier useful for performing or executing the method.

Method and device for producing a three-dimensional object, and computer and data carrier useful therefor

Process for the production of a three-dimensional object with resolution improvement by 'pixel-shift'

The invention relates to a method for producing a three-dimensional object by solidification of a material solidifiable under the action of electromagnetic radiation by means of energy input via an imaging unit comprising a predetermined number of discrete imaging elements (pixels). The method comprises performing solidification with exposure using bitmap mask. The bitmap mask may be formed from a stack of bitmap data provided by an overlap analysis of a three-dimensional volume completely or partially enclosing a three-dimensional model of at least a part of the three-dimensional object to be produced. Alternatively, bitmap mask may be formed from a two-dimensional data set comprising overlap information. Solidification may be performing with exposure using bitmap mask generated 'on the fly'. The invention is also directed to devices, and a computer and a data carrier useful for performing or executing the method.

An apparatus and a method for the separation of a material layer () hardened on a flat plane () serving as a reference by means of a flexible, elastic separating layer () arranged between plane and material layer and designed in the form of a film or a gel-like material, are provided.

Growing community of inventors

Hünxe, Germany

Hendrik John