The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2013
Filed:
Sep. 21, 2011
Hongqing V. Wang, Ft. Mill, SC (US);
Soon-chun Kuek, Rock Hill, SC (US);
Charles W. Hull, Santa Clara, CA (US);
Richard Ora Gregory, Ii, Rock Hill, SC (US);
Thomas Alan Kerekes, Calabasas, CA (US);
Hongqing V. Wang, Ft. Mill, SC (US);
Soon-Chun Kuek, Rock Hill, SC (US);
Charles W. Hull, Santa Clara, CA (US);
Richard Ora Gregory, II, Rock Hill, SC (US);
Thomas Alan Kerekes, Calabasas, CA (US);
3D Systems, Inc., Rock Hill, SC (US);
Abstract
There is provided methods and apparatus for compensation of intensity profiles of imagers used in three-dimensional modelers. The intensity profile of the actinic radiation projected from the imager is determined by a variety of techniques, including but not limited to manually operated sensors, exposed and scanned actinic radiation-sensitive paper, and intensity profilers. Once the intensity profile of the imager is determined, each layer of the solidifiable liquid material is cured by projecting a plurality of patterns (as opposed to a single pattern) defining the two-dimensional cross-section of the part being cured. The patterns vary in duration, number, and/or shape to correlate to the intensity profile so that a single layer of selectively cured solidifiable liquid material is cured with a substantially equivalent (or otherwise controlled) amount of actinic radiation per unit of surface area to provide generally controlled and consistent part quality.