Abstract: The present disclosure provides a computer-implemented method for generating an application executable by a three-dimensional (3D) printing system to print a 3D object. The method may comprise providing at least one electronic file comprising a plurality of operations of the 3D printing system. An operation of the plurality of operations may be associated with a configuration of at least one component of the 3D printing system. The at least one electronic file may not comprise a source code usable to generate the application. The method may comprise using the at least one electronic file to generate at least another electronic file comprising the source code that is usable to generate the application.

Abstract: Techniques and systems for sub-pixel grayscale three-dimensional (3D) printing are described. A technique includes mapping a 3D digital model onto a 3D grid of voxels associated with a 3D printer; assigning a first intensity level to first voxels that are fully contained within the model, the first intensity level being sufficient to cure photoactive resin during a curing time; determining, based on geometric information provided by the model, containment degrees for second voxels that are partially contained within the model; assigning second intensity levels to the second voxels based respectively on the containment degrees, the second intensity levels being greater than a third intensity level and lesser than the first intensity level; assigning the third intensity level to third voxels that are outside of the model; and generating one or more graphic files based on the first, second, third voxels, and respectively assigned intensity levels.

Abstract: Techniques and systems for enhancing vertical edges during photopolymer-based three-dimensional (3D) printing are described.

Abstract: The present disclosure provides methods and systems for printing a three-dimensional (3D) object. The methods may comprise providing, adjacent to a build surface, a film comprising a polymeric precursor. A sensor may be used to determine a profile of the film. The profile may be indicative of a quality of the film. If the profile meets a quality threshold, at least a portion of the film may be exposed to light to initiate formation of a polymeric material from the polymeric precursor, thereby printing at least a portion of the 3D object.

Abstract: The present disclosure provides methods and systems for printing a three-dimensional (3D) object. The methods may comprise providing, adjacent to a build surface, a film comprising a polymeric precursor. A sensor may be used to determine a profile of the film. The profile may be indicative of a quality of the film. If the profile meets a quality threshold, at least a portion of the film may be exposed to light to initiate formation of a polymeric material from the polymeric precursor, thereby printing at least a portion of the 3D object.

Abstract: The present disclosure provides methods and systems for printing a three-dimensional (3D) object. The methods may comprise providing, adjacent to a build surface, a film comprising a polymeric precursor. A sensor may be used to determine a profile of the film. The profile may be indicative of a quality of the film. If the profile meets a quality threshold, at least a portion of the film may be exposed to light to initiate formation of a polymeric material from the polymeric precursor, thereby printing at least a portion of the 3D object.

Abstract: Techniques and systems for 3D printing using mirrors that are oriented at about 45 degrees from an X-axis and Y-axis are described. A technique includes receiving an object model; rotating the object model about 45 degrees around the Z-axis; generating cross-sectional images of the rotated object model; mapping pixels of the cross-sectional images to corresponding mirrors of a digital micromirror device of an additive manufacturing apparatus to form additive-manufacturing images, wherein edges of the mirrors are oriented about 45 degrees from the X-axis of the digital micromirror device and about 45 degrees from the Y-axis of the digital micromirror; and providing the additive manufacturing images to generate a build piece corresponding to the object model. Other implementations can include corresponding systems, apparatus, and computer program products.

Abstract: Techniques and systems for enhancing vertical edges during photopolymer-based three-dimensional (3D) printing are described.

Abstract: Techniques and systems for 3D printing using mirrors that are oriented at about 45 degrees from an X-axis and Y-axis are described. A technique includes receiving an object model; rotating the object model about 45 degrees around the Z-axis; generating cross-sectional images of the rotated object model; mapping pixels of the cross-sectional images to corresponding mirrors of a digital micromirror device of an additive manufacturing apparatus to form additive-manufacturing images, wherein edges of the mirrors are oriented about 45 degrees from the X-axis of the digital micromirror device and about 45 degrees from the Y-axis of the digital micromirror; and providing the additive manufacturing images to generate a build piece corresponding to the object model. Other implementations can include corresponding systems, apparatus, and computer program products.

Abstract: Techniques and systems for sub-pixel grayscale three-dimensional (3D) printing are described. A technique includes mapping a 3D digital model onto a 3D grid of voxels associated with a 3D printer; assigning a first intensity level to first voxels that are fully contained within the model, the first intensity level being sufficient to cure photoactive resin during a curing time; determining, based on geometric information provided by the model, containment degrees for second voxels that are partially contained within the model; assigning second intensity levels to the second voxels based respectively on the containment degrees, the second intensity levels being greater than a third intensity level and lesser than the first intensity level; assigning the third intensity level to third voxels that are outside of the model; and generating one or more graphic files based on the first, second, third voxels, and respectively assigned intensity levels.

Abstract: Techniques and systems for 3D printing using mirrors that are oriented at about 45 degrees from an X-axis and Y-axis are described. A technique includes receiving an object model; rotating the object model about 45 degrees around the Z-axis; generating cross-sectional images of the rotated object model; mapping pixels of the cross-sectional images to corresponding mirrors of a digital micromirror device of an additive manufacturing apparatus to form additive-manufacturing images, wherein edges of the mirrors are oriented about 45 degrees from the X-axis of the digital micromirror device and about 45 degrees from the Y-axis of the digital micromirror; and providing the additive manufacturing images to generate a build piece corresponding to the object model. Other implementations can include corresponding systems, apparatus, and computer program products.

Abstract: Techniques and systems for enhancing vertical edges during photopolymer-based three-dimensional (3D) printing are described.

Abstract: Techniques and systems for 3D printing using mirrors that are oriented at about 45 degrees from an X-axis and Y-axis are described. A technique includes receiving an object model; rotating the object model about 45 degrees around the Z-axis; generating cross-sectional images of the rotated object model; mapping pixels of the cross-sectional images to corresponding mirrors of a digital micromirror device of an additive manufacturing apparatus to form additive-manufacturing images, wherein edges of the mirrors are oriented about 45 degrees from the X-axis of the digital micromirror device and about 45 degrees from the Y-axis of the digital micromirror; and providing the additive manufacturing images to generate a build piece corresponding to the object model. Other implementations can include corresponding systems, apparatus, and computer program products.

Abstract: Techniques and systems for sub-pixel grayscale three-dimensional (3D) printing are described. A technique includes mapping a 3D digital model onto a 3D grid of voxels associated with a 3D printer; assigning a first intensity level to first voxels that are fully contained within the model, the first intensity level being sufficient to cure photoactive resin during a curing time; determining, based on geometric information provided by the model, containment degrees for second voxels that are partially contained within the model; assigning second intensity levels to the second voxels based respectively on the containment degrees, the second intensity levels being greater than a third intensity level and lesser than the first intensity level; assigning the third intensity level to third voxels that are outside of the model; and generating one or more graphic files based on the first, second, third voxels, and respectively assigned intensity levels.

Abstract: The invention provides a graphic input device which has uniform sensitivity and is free of keystone distortion but which is lighter and less expensive to manufacture than the prior art, particularly for large drawing surfaces. It uses Fresnel optics to reduce the cost, thickness, and weight of the prism or collimator or both. Means are provided to mitigate the effects of lens flare from the Fresnel optics, minimize the thickness of the device, and to correct any remaining distortion in the camera's image using software executing on a standard computer.

Abstract: An integrated circuit comprising an insulating substrate; a layer of silicon formed on said insulating substrate; a p-channel transistor and an n-channel transistor formed in said silicon layer and interconnected in a CMOS circuit; wherein the ratio of transistor p-channel length to transistor n-channel length in the CMOS circuit is less than or equal to one.

Abstract: A graphic input device is described which has uniform sensitivity and is free from keystone distortion. The device includes a triangular prism with one face thereof defining the drawing surface. A camera is mounted on the other side of the drawing surface in a manner to capture light rays which have been totally internally reflected from the drawing surface. A collimating lens is mounted between the prism and the camera and is oriented such that its focal point is coincident with the camera's viewpoint and its principal surface is normal to the camera's optical axis. By placing the camera's viewpoint at the focal point of the collimator, the principal image forming rays will all be parallel within the transparent material. Thus they will intersect the drawing surface in equal angles, providing equal sensitivity everywhere. By making the optical axis of the camera normal to the principal surface of the collimator, these rays will all be made to traverse equal distances while converging towards the viewpoint.

Abstract: There is provided a wave attenuation device for abating waves and therefore erosion of a shorefront or marina of a body of water. The device includes a plurality of spaced apart, elongated plates for receiving waves therethrough. The plates are retained together by a plurality of vertical supports. The device may include a structure to anchor the device in place in a body of water.

Abstract: There is provided a wave attenuation device for abating waves and the erosion of a shorefront of a body of water. The device includes a plurality of rows of hollow tubes for receiving waves therethrough. Each tube in a row is in a side-by-side relation to its adjacent tubes and has its centerline positioned basically perpendicular to the shorefront. The device also includes a plurality of first and second horizontal supports, a plurality of vertical supports, and bracket and bolts for connecting one of the plurality of vertical supports to one of the first and one of the second horizontal supports to retain the plurality of rows of tubes in position with respect to each other. The device may include a structure to anchor the device in place in a body of water.

Abstract: A stable sense rail amplifier for CMOS memories is provided allowing very small voltage swings at or very close to the power supply rail to be transformed into substantially rail-to-rail swings. The input of the amplifier is coupled to the output of memory cells which may be designed to have output swings of 200 millivolts or less. These output swings are shifted to approximately the center of the range between the supply voltage and ground. While the level shifting is performed a small amount of linear gain is added. Subsequently the shifted signal is applied to a linear high gain amplifier stage. The high gain amplifier has as its output a substantially rail-to-rail signal. The total delay from the input rail of the amplifier to the high gain inverting amplifier stage is limited to the transfer time of a single CMOS FET. The amplifier is self-biasing and self-referencing.