3d Systems, Inc.

Hop D Hguyen

Dennis R Smalley

Charles W Hull

Richard Noel Leyden

Paul F Jacobs

Chris Robert Manners

Thomas H Pang

Jan Richter

John J Gigl

Kerry J Allen

An improved method for stereolithographically making an object by alternating the order in which similar sets of vectors are exposed over two or more layers. In another method, a pattern of tightly packed hexagonal tiles are drawn. Each tile is isolated from its neighboring tiles by specifying breaks of unexposed material between the tiles. Using an interrupted scan method, vectors are drawn with periodic breaks along their lengths. In another method, modulator and scanning techniques are used to reduce exposure problems associated with the acceleration and deceleration of the scanning system when jumping between vectors or changing scanning directions. In another method, a capability for automatically inserting vents an drains into a three-dimensional object representation is provided.

Method of making a three-dimensional object by stereolithography

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Quartz Hill, CA, United States of America

Hop D Hguyen