The present invention relates to methods and systems for volumetric printing a three-dimensional object. The methods and systems include achieving polymerization in a photopolymerizable liquid at the intersection of a first optical projection of excitation light and second optical projection of excitation light comprising a sheet of excitation light.

The present invention relates to a building platform (100) for building up a workpiece (200) in layers or continuously by stereolithography, comprising: a rear illumination device (101-1) for illuminating a layer (103-n) from a rear side; a photosensor (105) for detecting a light intensity of a light from a front illumination device (101-2) through the layer (103-n) and/or a material and/or a deflecting mirror; and a control device (107) for activating the rear illumination device (101-1) when the detected light intensity of the front illumination device (101-2) is above a predetermined threshold.

The invention discloses a system and method to obtain a set of corrected projected patterns from an integrated 3D measurement system so that the solidification of the formed object appears at the same time in a volumetric printer such as a tomographic back-projection or multi-beam printer, hence ensuring that the object is formed with the highest fidelity and spatial resolution.

The invention discloses a system and method to obtain a set of corrected projected patterns from an integrated 3D measurement system so that the solidification of the formed object appears at the same time in a volumetric printer such as a tomographic back-projection or multi-beam printer, hence ensuring that the object is formed with the highest fidelity and spatial resolution.

There are proposed a 3D printer optical engine and printing system capable of forming a single light engine by integrating light sources. A light engine installed under a tank accommodating a photocurable resin and configured to provide a light source for the molding of an output product to the tank includes: a light engine case detachably mounted under the tank, and having an accommodation space therein; a backlight module detachably installed in the lower portion of the accommodation space of the light engine case, and configured to provide backlight; and an image switching module detachably installed in the upper portion of the accommodation space of the light engine case while being spaced apart from the backlight module, and configured to cure the photocurable resin by radiating a light source corresponding to a tomographic image of the output product onto the tank.

The present invention relates to a method and device for layer-wise instruction of a shaped body by stereolithography in subsequent layers.

The present invention relates to a method and device for layer-wise instruction of a shaped body by stereolithography in subsequent layers.

An example apparatus to produce a three-dimensional object comprises a controller, a build area configured to receive a layer of particulate material, a printhead, and an ultraviolet light emitting diode energy source. The controller is to cause the printhead to deposit a liquid which absorbs ultraviolet radiation onto the layer of particulate material. The controller is further to cause the ultraviolet light emitting diode energy source to irradiate the liquid, after the liquid has been deposited onto the layer of particulate material, thereby to heat the liquid and cause a portion of the particulate material to solidify.

An apparatus for 3D printing of the bottom-up photo-curing type, including a first source of photo-curing radiation, of the DLP type, having a predetermined wavelength, and a second source of photo-curing radiation, of the laser type, having a wavelength equal to that of the first source, the second source using laser deflection and a polarisation coupling optic, the first source having linear polarisation oriented according to a predetermined angle, and the second source having linear polarisation oriented according to an angle orthogonal to that of the first source; the second source having variable irradiating flux power and the laser deflection having variable speed, the irradiating flux power and speed of the laser deflection controlled by predictive software as a function of the time required for photo-curing of each layer by the first source. Embodiments also relate to a method of 3D printing of the bottom-up photo-curing type using the apparatus.

An apparatus for 3D printing of the bottom-up photo-curing type, including a first source of photo-curing radiation, of the DLP type, having a predetermined wavelength, and a second source of photo-curing radiation, of the laser type, having a wavelength equal to that of the first source, the second source using laser deflection and a polarisation coupling optic, the first source having linear polarisation oriented according to a predetermined angle, and the second source having linear polarisation oriented according to an angle orthogonal to that of the first source; the second source having variable irradiating flux power and the laser deflection having variable speed, the irradiating flux power and speed of the laser deflection controlled by predictive software as a function of the time required for photo-curing of each layer by the first source. Embodiments also relate to a method of 3D printing of the bottom-up photo-curing type using the apparatus.