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Charles Sperry
Charles W Hull, Jouni P Partanen, Charles R Sperry, Patrick Dunne, Suzanne M Scott, Dennis F McNamara, Chris R Manners: Edge smoothness with low resolution projected images for use in solid imaging. 3D Systems, Ralph D Alessandro, Keith A Roberson, July 20, 2010: US07758799 (8 worldwide citation)

A solid imaging apparatus and 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-d ...


2
Charles Sperry
Jouni P Partanen, Raymond M Soliz, Dennis F McNamara Jr, Charles R Sperry, Charles W Hull: Bubble-free cross-sections for use in solid imaging. 3D Systems, William A Simons, Keith A Robertson, March 15, 2011: US07906061 (5 worldwide citation)

A solid imaging apparatus and method employing build material transfer means effective to transfer solidifiable liquid build material from a first side of a radiation transparent build material carrier to a receiving substrate without entrapping air bubbles in layers of transferred solidifiable liqu ...


3
Charles Sperry
Charles W Hull, Jouni P Partanen, Charles R Sperry, Patrick Dunne, Suzanne M Scott, Dennis F McNamara, Chris R Manners: Edge smoothness with low resolution projected images for use in solid imaging. 3D Systems, April 22, 2014: US08703037 (1 worldwide citation)

A solid imaging apparatus and 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-d ...


4
Charles Sperry
Charles W Hull, Jouni P Partanen, Charles R Sperry, Patrick Dunne, Suzanne M Scott, Dennis F McNamara, Chris R Manners: Edge smoothness with low resolution projected images for use in solid imaging. 3D Systems, Summa Allan & Additon, October 26, 2006: US20060239588-A1

A solid imaging apparatus and 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-d ...


5
Chris R Manners, Michelle D Guertin, Hop D Nguyen, Jouni P Partanen, Nansheng Tang, Michael A Everett: Stereolithographic method and apparatus for production of three dimensional objects using multiple beams of different diameters. 3D Systems, Ralph D&apos Alessandro, June 18, 2002: US06406658 (43 worldwide citation)

A rapid prototyping and manufacturing (e.g. stereolithography) method and apparatus for making three-dimensional objects on a layer by layer basis by selectively exposing layers of material to prescribed stimulation, using a beam having a first smaller diameter and a beam having a second larger diam ...


6
Jouni P Partanen, Dennis R Smalley: Apparatus and method for controlling exposure of a solidifiable medium using a pulsed radiation source in building a three-dimensional object using stereolithography. 3D Systems, Ralph D&apos Alessandro, April 10, 2001: US06215095 (33 worldwide citation)

Methods and apparatus for forming three-dimensional objects from a medium solidifiable when subjected to a beam of pulsed radiation wherein the pulses of radiation are made to occur when the beam is directed to desired pulsing locations on a target surface of the medium. Preferred embodiments of the ...


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Jouni P Partanen, William F Hug: Apparatus and method for forming three-dimensional objects in stereolithography utilizing a laser exposure system having a diode pumped frequency quadrupled solid state laser. 3D Systems, Lyon & Lyon, November 24, 1998: US05840239 (27 worldwide citation)

Embodiments of the instant invention are directed to laser exposure systems that employ a pulsed solid state laser to provide a reactive response wavelength and a pulse repetition rate specifically optimized for application to solidification of a liquid photopolymer in a stereolithographic process. ...


9
Hop D Nguyen, Jouni P Partanen: Method of and apparatus for making partially solidified three-dimensional objects on a layer-by-layer basis from a solidifiable medium. 3D Systems, Merchant Gould Smith Edell Welter & Schmidt, January 5, 1999: US05855718 (26 worldwide citation)

A method and apparatus for building three-dimensional objects having an internal structure, wherein the structure is discontinuous and is composed from a plurality of patterns and bridging patterns formed on a plurality of levels, wherein a bridging level and pattern reside between previous and subs ...


10
Tae Mark Chung, Jouni P Partanen: Continuous calibration of a non-contact thermal sensor for laser sintering. 3D Systems, Ralph D Alessandro, August 16, 2005: US06930278 (21 worldwide citation)

An apparatus and a method of using the apparatus wherein a radiation emitter is positioned adjacent a sensor apparatus within a process chamber in a laser sinter system that emits radiation to the sensor apparatus and a calibration apparatus receives readings from the sensor apparatus to compare tem ...