Joseph E Demers

US Patent:

7126078, Oct 24, 2006

Filed:

Jun 2, 2004

Appl. No.:

10/859871

Inventors:

Joseph R Demers - Glendale CA, US
Nathan Woodard - Pasadena CA, US
Chien-Chung Chen - Thousand Oaks CA, US

Assignee:

Emcore Corporation - Albuquerque NM

International Classification:

B23K 11/10
B23K 11/30
B23K 35/02

US Classification:

2191171, 219 869, 219119, 219 5621, 219 5622

Abstract:

An arrangement is provided including an electrode extending to an electrode tip for contacting a workpiece. A welding configuration of the electrode tip is established by exposing the electrode tip to a selected welding environment for use in forming a weld having a target set of weld parameters. An electrode passage is defined in a biasing force arrangement supporting at least a portion of the length of an elongated, flexible electrode and to limit lateral movement sufficient to transfer at least a portion of a resilient force to the electrode tip so that the tip resiliently contacts the weld region. The electrode passage limits induced lateral flexing to an extent which transfers an amount of the resilient force to the first end portion of the electrode that is sufficient to provide for formation of a weld between the support arrangement and the workpiece.

US Patent:

7291839, Nov 6, 2007

Filed:

May 3, 2005

Appl. No.:

11/121350

Inventors:

Joseph R Demers - Glendale CA, US

Assignee:

Emcore Corporation - Somerset NJ

International Classification:

G01J 5/02

US Classification:

2503411, 2503381

Abstract:

A system, method and detection arrangement for investigation of a sample are described. A laser illumination arrangement generates (i) a source laser energy that is incident on a source to cause emission of subcentimeter radiation, at least a portion of which interacts with the sample to serve as a sample influenced radiation incident on a detector and (ii) a detector laser energy that is incident on the detector to produce an optical component of the detector laser energy offset with respect to a corresponding optical component of the source laser energy so that the collective energy at the detector generates an electrical output signal responsive to the sample influenced radiation. In another aspect, a detection arrangement is used with at least two continuous wave lasers for causing the detector body to respond in a way which produces a frequency down-converted signal from an incident electromagnetic radiation.

US Patent:

7430081, Sep 30, 2008

Filed:

May 17, 2002

Appl. No.:

10/150183

Inventors:

Nathan G. Woodard - Pasadena CA, US
Eric C. Johnson - Altadena CA, US
Jon F. Nielsen - Los Angeles CA, US
Joseph R. Demers - Pasadena CA, US
Chien-Chung Chen - Thousand Oaks CA, US

Assignee:

Emcore Corporation - Somerset NJ

International Classification:

G02B 7/02

US Classification:

359814, 359819

Abstract:

An optical assembly includes a light path and at least one optic to be positioned in the path. A support arrangement supports the optic having a foot arrangement including at least one foot that receives a direct manipulation with the foot slidingly engaged against a support surface to move the optic relative to the light path. Movement of the foot may move the optic along a predetermined path. The foot defines a footprint for engaging the support surface and receives the direct manipulation in a way which changes the footprint on the support surface to move the optic responsive to changes in the footprint. A movement arrangement may selectively bias the foot against the support surface during a movement mode, intended to permit movement of the foot against the support surface, and in a locked mode, intended to lock the foot against the support surface.

US Patent:

7439511, Oct 21, 2008

Filed:

Apr 26, 2007

Appl. No.:

11/796069

Inventors:

Joseph R. Demers - Glendale CA, US

Assignee:

Emcore Corporation - Albuquerque NM

International Classification:

G01J 5/02

US Classification:

2503411

Abstract:

An apparatus for analyzing, identifying or imaging an target including a source of pulsed signals in the range of frequencies from 100 GHz to over 2 THz focused on or transmitted through the target; and a detector for acquiring spectral information from signals reflected from the target and using a multi-spectral heterodyning process to generate an electrical signal representative of some characteristics of the target. The source of pulse signals and the detector are photoconductive switches activated by a pulsed laser beam from a single mode-locked laser.

US Patent:

7508390, Mar 24, 2009

Filed:

Aug 17, 2004

Appl. No.:

10/921019

Inventors:

Joseph E. Demers - Palo Alto CA, US

Assignee:

NVIDIA Corporation - Santa Clara CA

International Classification:

G06T 15/40

US Classification:

345426, 345422

Abstract:

A method for rendering a shadow in a 3 D scene includes generating a penumbra map using a z-buffer and generating an occluder map using the z-buffer. The penumbra map and the occluder map are projected into a 3 D scene to render at least one shadow having a penumbra region and an umbra region.

US Patent:

7535005, May 19, 2009

Filed:

Jan 31, 2007

Appl. No.:

11/669685

Inventors:

Joseph R. Demers - Glendale CA, US

Assignee:

Emcore Corporation - Albuquerque NM

International Classification:

G01J 5/02

US Classification:

2503411

Abstract:

An apparatus for analyzing, identifying or imaging an object including a source of pulsed signals in the range of frequencies from 100 GHz to over 2 THz focused on the object; and a detector for acquiring spectral information from signals reflected from the object and using a heterodyning process to generate an electrical signal representative of some characteristics of the object. The source of pulse signals and the detector is a photoconductive switch activated by a pulsed laser beam.

US Patent:

7672068, Mar 2, 2010

Filed:

Aug 26, 2008

Appl. No.:

12/198452

Inventors:

Nathan G. Woodard - Pasadena CA, US
Eric C. Johnson - Altadena CA, US
Jon F. Nielsen - Los Angeles CA, US
Joseph R. Demers - Pasadena CA, US
Chien-Chung Chen - Thousand Oaks CA, US

Assignee:

Emcore Corporation - Albuquerque NM

International Classification:

G02B 7/02

US Classification:

359814, 359809

Abstract:

An optical assembly includes a light path and at least one optic to be positioned in the path. A support arrangement supports the optic having a foot arrangement including at least one foot that receives a direct manipulation with the foot slidingly engaged against a support surface to move the optic relative to the light path. Movement of the foot may move the optic along a predetermined path. The foot defines a footprint for engaging the support surface and receives the direct manipulation in a way which changes the footprint on the support surface to move the optic responsive to changes in the footprint. A movement arrangement may selectively bias the foot against the support surface during a movement mode, intended to permit movement of the foot against the support surface, and in a locked mode, intended to lock the foot against the support surface.

US Patent:

7746476, Jun 29, 2010

Filed:

Jul 11, 2007

Appl. No.:

11/776452

Inventors:

Joseph R. Demers - Glendale CA, US
Ka Kha Wong - Alhambra CA, US

Assignee:

Emcore Corporation - Albuquerque NM

International Classification:

G01C 19/72

US Classification:

356462, 356460

Abstract:

A fiber optic gyroscope including an optical circulator in the path of said first and second beams for providing polarized first and second beams of identical polarization. A phase modulator couples the first and second beams to the first and second end respectively of the fiber loop, and couples for receiving the return first and second beams from the second and first ends respectively of the fiber loop. First and second photodiodes are coupled to the optical circulator for receiving the optical signal from the first and second return beams.