公开(公告)号：US20170102679A1

公开(公告)日：2017-04-13

申请号：US15287205

申请日：2016-10-06

Applicant: Autodesk, Inc.

Inventor： Richard M. Greene ,  Ryan Michael Schmidt

IPC: G05B17/02 ,  B29C67/00 ,  B33Y50/02 ,  B33Y10/00 ,  B33Y30/00

CPC classification number: G06T19/00 ,  B29C64/129 ,  B29C64/386 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B33Y50/02 ,  G05B17/02 ,  G05B2219/49023 ,  G06T15/00 ,  G06T15/08 ,  G06T15/506 ,  G06T17/00 ,  H04N1/6061

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.

公开(公告)号：US20180086003A1

公开(公告)日：2018-03-29

申请号：US15719118

申请日：2017-09-28

Applicant: Autodesk, Inc.

Inventor： Richard M. Greene ,  Brian James Adzima ,  Stephen James Kranz

IPC: B29C64/393 ,  B29C64/135 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

CPC classification number: B29C64/393 ,  B29C64/129 ,  B29C64/135 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  G06T11/00 ,  G06T17/00

Abstract: Techniques and systems for enhancing vertical edges during photopolymer-based three-dimensional (3D) printing are described. A described technique includes accessing an original image corresponding to a slice of a 3D model prepared for printing on a 3D printer; accessing a pixel reduction factor that is associated with an increased exposure duration parameter; classifying pixels of the original image; reducing intensity levels of the interior pixels by the pixel reduction factor so that corresponding printing areas receive first curing doses under the increased exposure duration parameter and the reduced intensity levels that are comparable to doses received under an unmodified exposure duration parameter and unreduced intensity levels; maintaining intensity levels of the exterior pixels so that corresponding printing areas receive second curing doses under the increased exposure duration parameter that are greater than doses associated with the unmodified exposure duration parameter; and outputting a resulting modified image for 3D printing.

公开(公告)号：US20170326807A1

公开(公告)日：2017-11-16

申请号：US15593939

申请日：2017-05-12

Applicant: Autodesk, Inc.

Inventor： Richard M. Greene ,  Michael Daum

IPC: B29C64/393 ,  G05B19/4099 ,  B33Y50/00

CPC classification number: B29C64/393 ,  B29C64/129 ,  B29C64/386 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  G05B19/4099 ,  G05B2219/49023

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.