公开(公告)号：JP2000141499A

公开(公告)日：2000-05-23

申请号：JP7011699

申请日：1999-03-16

Applicant: 3 D SYSTEMS INC

Inventor： SNEAD DAVID E ,  SMALLEY DENNIS R ,  COHEN ADAM L ,  ALLISON JOSEPH W ,  VORGITCH THOMAS J ,  CHEN THOMAS P ,  NGUYEN HOP P ,  SCHMID CHRIS A ,  EVANS HERBERT E ,  FRIED RAYMOND S ,  JACOB PAUL F ,  BINSAN WAYNE A

IPC: B29C35/08 ,  B29C67/00 ,  B29K105/24 ,  B29L9/00 ,  G06F17/50

Abstract: PROBLEM TO BE SOLVED: To obtain an optical shaping method of high resolving power and to reduce surface discontinuity by forming boule differentiation between initial layer data of first and second layers to form the data of the first layer and forming the layer data of the other layer to form layers one by one. SOLUTION: The boundary lines S[4]+, S[5]- and S[4]* of a matter and the slide plane thereof are provided and boule subtraction is performed between a certain layer and the layer on the upper side thereof and, from layer contours L(4)', L(5)', the region U(4) on the layer not overlapped with the upper side layer is determined. Next, boule differentiation between the layer contour L(4)' and the region facing to the bottom is operated to again adjust the layer contour. Next, the layer contour is subjected to third adjustment in order to subtract the region facing to the surface. The layer contour adjusted three times is obtained by operating the boule differentiation between the layer contour adjusted twice and the adjusted contour facing to the surface.

公开(公告)号：JP2002086575A

公开(公告)日：2002-03-26

申请号：JP2001233815

申请日：2001-08-01

Applicant: 3 D SYSTEMS INC

Inventor： JACOBS PAUL F ,  HULL CHARLES W ,  SMALLEY DENNIS R ,  ALLISON JOSEPH W

IPC: B29C35/08 ,  B29C67/00 ,  B29C67/02 ,  B29K105/24 ,  G03F7/00 ,  G03F7/20

Abstract: PROBLEM TO BE SOLVED: To improve the precision of a three-dimensional object by reducing strain in forming the object by stereo-lithography. SOLUTION: When one layer of the three-dimensional object is formed by forming a medium layer on a previously solidified layer of the object and exposing the medium layer selectively to a solidifying stimulus, at least one part of at least one layer is exposed in a tile pattern in which each tile is separated by the interval of the unexposed medium between the tiles from any adjacent tile.