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公开(公告)号：DE602006011819D1
公开(公告)日：2010-03-11
申请号：DE602006011819
申请日：2006-03-20
Applicant: 3D SYSTEMS INC
Inventor： HULL CHARLES W , PARTANEN JOUNI P , SPERRY CHARLES R , DUNNE PATRICK , SCOTT SUZANNE M , MCNAMARA DENNIS F , MANNERS CHRIS R
Abstract: A solid imaging method employing sub-pixel shifting in multiple exposures of the digitally light projected image of a cross-section of a three-dimensional object on a solidifiable liquid medium. The multiple exposures provide increased resolution, preserving image features in a three-dimensional object and smoothing out rough or uneven edges that would otherwise occur using digital light projectors that are limited by the number of pixels in an image projected over the size of the image. Algorithms are used to select pixels to be illuminated within the boundary of each image projected in the cross-section being exposed.
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公开(公告)号：AT456074T
公开(公告)日：2010-02-15
申请号：AT06251474
申请日：2006-03-20
Applicant: 3D SYSTEMS INC
Inventor： HULL CHARLES W , PARTANEN JOUNI P , SPERRY CHARLES R , DUNNE PATRICK , SCOTT SUZANNE M , MCNAMARA DENNIS F , MANNERS CHRIS R
Abstract: A solid imaging method employing sub-pixel shifting in multiple exposures of the digitally light projected image of a cross-section of a three-dimensional object on a solidifiable liquid medium. The multiple exposures provide increased resolution, preserving image features in a three-dimensional object and smoothing out rough or uneven edges that would otherwise occur using digital light projectors that are limited by the number of pixels in an image projected over the size of the image. Algorithms are used to select pixels to be illuminated within the boundary of each image projected in the cross-section being exposed.
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公开(公告)号：DE60031317T2
公开(公告)日：2007-05-31
申请号：DE60031317
申请日：2000-02-08
Applicant: 3D SYSTEMS INC
Inventor： NGUYEN HOP D , MANNERS CHRIS R
IPC: B29C67/00 , B29C41/12 , B29C41/36 , G05B19/4099
Abstract: A rapid prototyping and manufacturing (e.g. stereolithography) method and apparatus for making three-dimensional objects with enhanced control of coating parameters used when forming layers of liquid or other fluid-like material in preparation for forming laminae of the object. Then each lamina (201-220) of the object is treated as either a primary laminae (P) or secondary laminae (S). Only minority portions of the secondary layers (S) are solidified when their associated layers are formed. Primary laminae (P) are solidified in majority portions, along with previously unsolidified portions of secondary lamina, when their associated layers are formed. Recoating parameters are supplied for groups of primary layers (P) and secondary layers (S) such that coating formation may be controlled differently for primary layers and for secondary layers. Coating control for secondary layers may be based on the position of individual secondary layers, or sets of secondary layers, relative to the primary layers. The enhanced control leads to (1) more accurate layer formation, and/or (2) faster layer formation times for groups of successive layers.
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公开(公告)号：AT456075T
公开(公告)日：2010-02-15
申请号：AT06251473
申请日：2006-03-20
Applicant: 3D SYSTEMS INC
Inventor： HULL CHARLES W , PARTANEN JOUNI P , SPERRY CHARLES R , DUNNE PATRICK , SCOTT SUZANNE M , MCNAMARA DENNIS F , MANNERS CHRIS R
Abstract: A solid imaging method employing sub-pixel shifting in multiple exposures of the digitally light projected image of a cross-section of a three-dimensional object on a solidifiable liquid medium. The multiple exposures provide increased resolution, preserving image features in a three-dimensional object and smoothing out rough or uneven edges that would otherwise occur using digital light projectors that are limited by the number of pixels in an image projected over the size of the image. Algorithms are used to select pixels to be illuminated within the boundary of each image projected in the cross-section being exposed.
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公开(公告)号：AT209101T
公开(公告)日：2001-12-15
申请号：AT95917693
申请日：1995-04-25
Applicant: 3D SYSTEMS INC
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Patent Agency Ranking
公开(公告)号：AU7376696A
公开(公告)日：1997-04-17
申请号：AU7376696
申请日：1996-09-27
Applicant: 3D SYSTEMS INC
Inventor： EARL JOCELYN M , MANNERS CHRIS R , KEREKES THOMAS A , MARYGOLD PAUL H , THAYER JEFFREY S
Abstract: A three-dimensional object is formed by selectively depositing successive layers (14) of build material from a print-head (9) having a plurality of orifices or nozzles (10(1)-10(96)), such as an ink-jet type of print-head. The print-head (9) is moved (X-Y control) relative to a support platform (15) in a series of scans in the X-direction offset from one another in the Y-direction and possibly overlapping. The orifices (10(1)-10(96)) extend transversely of the scan X-direction and may be set at an angle (α) to it to control the resolution perpendicular to the scan direction. The platform (15) is movable relative to the print-head in the Z-direction for forming each successive layer (14). The build material is a flowable material and may be a radiation-curable material, such as an ultra-violet curable photo-polymer. The data according to which each layer is formed may be manipulated according to a selected build style to determine the selective activation of the print-head orifices.
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公开(公告)号：CA2186613A1
公开(公告)日：1995-11-02
申请号：CA2186613
申请日：1995-04-25
Applicant: 3D SYSTEMS INC
Inventor： GIGL JOHN J , PANG THOMAS H , SMALLEY DENNIS R , ALLEN KERRY J , VORGITCH THOMAS J , MANNERS CHRIS R , EARL JOCELYN M , BEDAL BRYAN J L , JACOBS PAUL F , NGUYEN HOP D , LEYDEN RICHARD N , HULL RICHARD N , VANDORIN STACIE L
Abstract: A method and apparatus for making high resolution objects by stereolithography utilizing low resolution materials which are limited by their inability to form unsupported structures of desired thinness and/or their inability to form coatings of desired thinness. Data manipulation techniques, based on layer comparisons, are used to control exposure in order to delay solidification of the material on at least portions of at least some cross-sections until higher layers of material are deposited so as to allow down-facing features of the object to be located at a depth in the building material which is equal to or exceeds a minimum cure depth that can effectively be used for solidifying these features. Similar data manipulations are used to ensure minimum reliable coating thicknesses exist, above previously solidified material, before attempting solidification of a next layer. In addition, horizontal comparison techniques are used to provide enhanced cross-sectional data for use in forming the object. Further, several techniques for automatically performing Zerror correction through the manipulation of a three-dimensional object representation are described. Still further, techniques for producing objects useful for investment casting applications are described, including techniques allowing for the drainage of unsolidified material. A method and apparatus for the automatic generation of vents and drain is also provided.
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公开(公告)号：DE60106817T2
公开(公告)日：2005-12-08
申请号：DE60106817
申请日：2001-07-05
Applicant: 3D SYSTEMS INC
Inventor： MANNERS CHRIS R , KULKARNI RAJEEV B
Abstract: An improved slicing technique for stereolithography is disclosed that employs micro-slicing or intermediate slices by identifying intermediate triangle vertices (1, 2, 3) in the STL file data in terms of surface triangles. Intermediate slice layers are passed through each intermediate vertex (1, 2, 3) to create a final build object or part that has smoother contouring, greater accuracy and an improved surface appearance than parts obtained using prior slicing methods.
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公开(公告)号：DE60106817D1
公开(公告)日：2004-12-09
申请号：DE60106817
申请日：2001-07-05
Applicant: 3D SYSTEMS INC
Inventor： MANNERS CHRIS R , KULKARNI RAJEEV B
Abstract: An improved slicing technique for stereolithography is disclosed that employs micro-slicing or intermediate slices by identifying intermediate triangle vertices (1, 2, 3) in the STL file data in terms of surface triangles. Intermediate slice layers are passed through each intermediate vertex (1, 2, 3) to create a final build object or part that has smoother contouring, greater accuracy and an improved surface appearance than parts obtained using prior slicing methods.
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公开(公告)号：AT240829T
公开(公告)日：2003-06-15
申请号：AT00201128
申请日：1996-09-27
Applicant: 3D SYSTEMS INC
Inventor： EARL JOCELYN M , MANNERS CHRIS R , KEREKES THOMAS A , MARYGOLD PAUL H , THAYER JEFFREY S
Abstract: A three-dimensional object is formed by selectively depositing successive layers (14) of build material from a print-head (9) having a plurality of orifices or nozzles (10(1)-10(96)), such as an ink-jet type of print-head. The print-head (9) is moved (X-Y control) relative to a support platform (15) in a series of scans in the X-direction offset from one another in the Y-direction and possibly overlapping. The orifices (10(1)-10(96)) extend transversely of the scan X-direction and may be set at an angle (α) to it to control the resolution perpendicular to the scan direction. The platform (15) is movable relative to the print-head in the Z-direction for forming each successive layer (14). The build material is a flowable material and may be a radiation-curable material, such as an ultra-violet curable photo-polymer. The data according to which each layer is formed may be manipulated according to a selected build style to determine the selective activation of the print-head orifices.
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