Kurt A Pelsue

6633338, Oct 14, 2003

Apr 27, 1999

09/301002

Kurt Pelsue - Wayland MA
Jonathan S. Ehrmann - Sudbury MA

GSI Lumonics, Inc. - Kanata

H04N 5222

348370, 348 31

The field portion ( ) of a workpiece ( ) that an electro-optical system ( ) can image is deflected by a field-of-view deflector ( ) and an array of light sources ( ) illuminates the workpiece. As the field of view ( ) moves about the workpiece surface, individual sources ( ) in the light-source array are so turned on and off that all sources that could be imaged into the field of view by specular reflection are turned off. In this way, proper dark-field illumination is maintained.

6979798, Dec 27, 2005

Feb 26, 2004

10/787517

Bo Gu - North Andover MA, US
Donald J. Svetkoff - Ann Arbor MI, US
Kurt Pelsue - Wayland MA, US

GSI Lumonics Corporation - Northville MI

B23K026/36

21912169, 21912168

Laser system and method for material processing with ultra fast lasers are provided. One aspect of the invention features the method which removes at least a portion of a target structure such as a memory link while avoiding undesirable damage to adjacent non-target structures. The method includes applying a single ultra short laser pulse to the target structure to remove the target structure with the single pulse.

7015418, Mar 21, 2006

May 15, 2003

10/438533

Steven P. Cahill - Newton MA, US
Jonathan S. Ehrmann - Sudbury MA, US
You C. Li - Reading MA, US
Rainer Schramm - Everett MA, US
Kurt Pelsue - Wayland MA, US

GSI Group Corporation - Billerica MA

B23K 26/00

21912169, 21912168

A method of calibrating a laser marking system includes calibrating a laser marking system in three dimensions. The step of calibrating includes storing data corresponding to a plurality of heights. A position measurement of a workpiece is obtained to be marked. Stored calibration data is associated with the position measurement. A method and system for calibrating a laser processing or marking system is provided. The method includes: calibrating a laser marker over a marking field; obtaining a position measurement of a workpiece to be marked; associating stored calibration data with the position measurement; relatively positioning a marking beam and the workpiece based on at least the associated calibration data; and calibrating a laser marking system in at least three degrees of freedom. The step of calibrating includes storing data corresponding to a plurality of positions and controllably and relatively positioning a marking beam based on the stored data corresponding to the plurality of positions.

7129601, Oct 31, 2006

Feb 13, 2002

10/075940

David C. Brown - Northborough MA, US
Felix Stukalin - Framingham MA, US
Michael B. Nussbaum - Newton MA, US
Kurt Pelsue - Wayland MA, US

GSI Group Corporation - Billerica MA

H02K 41/00

310 12, 385 18

A method and apparatus for supporting a movable member () with respect to a fixed member () is provided. The movable member () includes a magnetically permeable portion () contained therein and magnetic element () fixedly attached thereto and movable therewith. The movable member () is supported for rotation with respect to the fixed member () by an outer bearing surface () of the movable member and an inner bearing surface () of the fixed member (). The fixed member () provides access to the movable member () from two sides thereof. A magnetically permeable stator element () is fixedly attached to the fixed member () and positioned within a magnetic flux field of the magnetic element () such that an air gap () is formed between the magnetic element () and the stator element (). Accordingly a magnetic traction force acts across the air gap () for urging the moveable member () toward the fixed member () thereby clamping the movable element in a fixed orientation with respect to the movable element. The stator element () includes stator current coils () wound onto portions of the stator element for inducing electromagnetic forces within the stator element in response to a current passing through the coils.

7146064, Dec 5, 2006

Apr 2, 2002

10/114717

Christopher Wimperis - Ontario, CA
William McCreath - Stittsville, CA
William Eccleshall - Ottawa, CA
Mandeep Singh - Ottawa, CA
Christopher D. Becker - Greely, CA
Richard A. Neily - Kars, CA
Kurt Pelsue - Wayland MA, US

GSI Group Corporation - Billerica MA

G02B 6/12

385 14

A method of fabricating a plurality of composite optical assemblies is disclosed. Each optical assembly includes a first optical element and a second optical element. The method includes the steps of providing a first composite substrate that may be divided into a plurality of first optical elements and forming on an exposed surface of the first composite substrate a second composite substrate that may be divided into a plurality of second optical elements, the first and second composite substrates providing a composite structure.

7289693, Oct 30, 2007

Sep 26, 2006

11/535264

Christopher Wimperis - Ontario, CA
William McCreath - Stittsville CA, US
William Eccleshall - Ottawa CA, US
Mandeep Singh - Ottawa CA, US
Christopher Becker - Greely CA, US
Richard A. Neily - Kars CA, US
Kurt Pelsue - Wayland MA, US

GSI Group Corporation - Billerica MA

G02B 6/12

385 14

A method of fabricating a plurality of composite optical assemblies is disclosed. Each optical assembly includes a first optical element and a second optical element. The method includes the steps of providing a first composite substrate that may be divided into a plurality of first optical elements and forming on an exposed surface of the first composite substrate a second composite substrate that may be divided into a plurality of second optical elements, the first and second composite substrates providing a composite structure.

7817319, Oct 19, 2010

Jul 26, 2007

11/828391

Adam I. Pinard - Carlisle MA, US
Kurt Pelsue - Wayland MA, US
Felix Stukalin - Southborough MA, US

GSI Group Corporation - Bedford MA

G02B 26/08

3592021

A laser processing system is disclosed for providing a relatively small velocity of a laser beam at target location while at least one scanner scans at a relatively larger velocity. The system includes a laser source, a first scanning unit, a beam expander, a second scanning unit and focusing optics. The laser source is for providing a pulsed laser output having at least one beam with a beam dimension. The first scanning unit is for scanning the laser output in a first direction along a first axis at the target location. The beam expander is for receiving the laser output and for modifying a beam diameter of the laser output and providing a modified laser output. The second scanning unit is for scanning the modified laser output from the beam expander in a second direction along the first axis at the target location. The second direction is substantially opposite to the first direction along the first axis such that a net velocity of the modified laser output along the first axis at the target location may be made to be effectively zero during a laser pulse. The focusing optics is for focusing the modified laser output toward the target location.

7903336, Mar 8, 2011

Oct 11, 2006

11/546024

Kurt Pelsue - Wayland MA, US
Bradley L. Hunter - Lexington MA, US
Donald V. Smart - Boston MA, US
Pierre-Yves Mabboux - Billerica MA, US
Jonathan S. Ehrmann - Sudbury MA, US

GSI Group Corporation - Bedford MA

G02B 27/44
G02F 1/295
H03M 1/22
G01B 11/02

359563, 385 10, 341 13, 250237 G, 356499, 356494, 356521, 33707

A reflective metrological scale has a metal tape substrate and a scale pattern of elongated side-by-side marks surrounded by reflective surface areas of the substrate. Each mark has a furrowed cross section and may have a depth in the range of 0. 5 to 2 microns. The central region of each mark may be rippled and darkened to provide an enhanced optical reflection ratio with respect to surrounding surface areas. A manufacturing method includes the repeated steps of (1) creating a scale mark by irradiating the substrate surface at a mark location with overlapped pulses from a laser, each pulse having an energy density of less than about 1 joule per cm2, and (2) changing the relative position of the laser and the substrate by a displacement amount defining a next mark location on the substrate at which a next mark of the scale is to be created.