Hop Thi Nguyen

US Patent:

6406658, Jun 18, 2002

Filed:

Feb 8, 1999

Appl. No.:

09/248352

Inventors:

Chris R. Manners - Moorpark CA
Michelle D. Guertin - Valencia CA
Hop D. Nguyen - Quartz Hill CA
Jouni P. Partanen - Los Angeles CA
Nansheng Tang - Valencia CA
Michael A. Everett - Saugus CA

Assignee:

3D Systems, Inc. - Valencia CA

International Classification:

B29C 3508

US Classification:

264401, 4251744, 425375, 700120

Abstract:

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 diameter, to form laminae of the object. The power of the smaller beam is typically lower than the power of the larger beam. Object formation is controlled by data representing portions of the layers to be exposed with the larger beam (large spot portions) and those portions to be exposed with the smaller beam (small spot portions). In a preferred embodiment, portions exposed with the larger beam are formed first, for a given layer. Portions are exposed with the small beam next. Thereafter the entire perimeter of the laminae is traced using the small beam.

US Patent:

6649113, Nov 18, 2003

Filed:

Aug 11, 2000

Appl. No.:

09/637829

Inventors:

Chris R. Manners - Moorpark CA 93021
Kabir Bhatia - Stevenson Ranch CA 91381
Hop D. Nguyen - Quartz Hill CA 93536
Cathy Yenly Vu Phan - Garden Grove CA 92843
Khalil M. Moussa - Stevenson Ranch CA 91381

International Classification:

B29C 3508

US Classification:

264401, 264308

Abstract:

A method of forming a three-dimensional object in layerwise fashion by selectively solidifying a build material in a reinforced cyclical fashion. The method solidifies a first fully cured layer of build material and then partially solidifies at least one partially cured intermediate layer of build material having areas of liquid build material and areas of solidifying build material. The method repeats the cycle by solidifying a next overlying fully cured layer of build material and also the underlying liquid areas of build material in the at least one partially cured intermediate layer of build material.

US Patent:

53295390, Jul 12, 1994

Filed:

Oct 28, 1991

Appl. No.:

7/783532

Inventors:

Leonard P. Pearson - Sunnyvale CA
Todd E. Olson - Palo Alto CA
Hop G. Nguyen - Sunnyvale CA

Assignee:

Lightwave Electronics - Mountain View CA

International Classification:

H01S 3045

US Classification:

372 36

Abstract:

Compact solid state laser apparatus that includes a laser diode pump, beam forming optics, a laser gain medium and optical resonator, a photodetector to vary the power supplied to the laser diode pump to suppress relaxation oscillations that might otherwise appear in the laser gain medium output light beam, an optical isolator and laser output optics. Each of the optical components has an independently activatable heater to allow optical alignment of that component. Each of the laser diode pump and laser gain medium has an independently activatable thermoelectric cooler to allow optical alignment (laser gain medium only) and to provide thermal tuning of the output wavelength of that device. An optical platform, which is thermally conductive, electrically non-conductive and has low thermal expansion, supports the other components, provides a substrate for electrical traces that provide power for operation of the apparatus and contains the heaters for the optical components.

Address:

1915 Gdn Bing Cir, San Jose, CA 95131

VIN:

WDBUF56X67B018145

Make:

MERCEDES-BENZ

Model:

E-CLASS

Year:

2007