Patents by Inventor James Spence

James Spence has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190280456
    Abstract: A Raman Laser device having an nth Stokes shifted output the device including: a laser pump input; a lasing cavity having feedback elements at each end; and a diamond Raman active gain medium within the cavity, exhibiting first and higher Stokes emissions when subjected to pumping by the laser pump input; wherein the feedback elements feeding back the pump input, and 1st Stokes output from the gain medium, and a gain portion of the higher Stokes outputs, with a transmitting portion of the nth Stokes output being the output of the device.
    Type: Application
    Filed: September 21, 2017
    Publication date: September 12, 2019
    Applicant: Macquarie University
    Inventors: Robert Williams, Richard Paul Mildren, David James Spence, Oliver Lux
  • Publication number: 20180323572
    Abstract: A Raman laser device including: a Raman lasing medium adapted to undergo Raman lasing; and at least one pumping beam, for pumping a Stokes seed beam by stimulated Raman scattering whilst it traverses the Raman lasing medium.
    Type: Application
    Filed: November 18, 2016
    Publication date: November 8, 2018
    Inventors: Richard Paul Mildren, Aaron McKay, David James Spence, David Coutts
  • Patent number: 9941660
    Abstract: A tunable lasing device including a vertical external cavity surface emitting laser, adapted to generate a fundamental laser beam in response to pumping from a pump source, said fundamental laser beam having a fundamental wavelength and a fundamental linewidth; a fundamental resonator cavity adapted to resonate the fundamental beam therein; a first optical element located within the fundamental resonator cavity for control of the fundamental linewidth of the fundamental beam; a Raman resonator located at least partially in said fundamental resonator adapted to receive the fundamental beam and comprising therein, a solid state Raman active medium located therein for generating at least a first Stokes beam from the fundamental beam wherein said Raman resonator cavity is adapted to resonate said Stokes beam therein and further adapted to emit an output beam; and further comprising a nonlinear medium located within the Raman resonator cavity for nonlinear frequency conversion of at least one of the beams present
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: April 10, 2018
    Assignee: Macquarie University
    Inventors: Jipeng Lin, Helen M. Pask, David James Spence, Craig J. Hamilton, Graeme P. A. Malcolm
  • Patent number: 9837787
    Abstract: A method and system for generating a Raman second Stokes light to a source light comprising generating a Raman first Stokes light from the source light by a Raman interaction in a nonlinear optical medium disposed in an optical resonator, and resonating the Raman first Stokes light in the optical resonator; generating a seed light at the frequency of the Raman second Stokes light from the source light and the Raman first Stokes light by a four wave mixing process which is not phase matched in the nonlinear medium; amplifying the seed light by transferring power from the first Stokes light resonating in the optical resonator to the seed light using a Raman amplification process in the nonlinear medium; and extracting from the optical resonator a majority of the power of the seed light so amplified.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: December 5, 2017
    Assignee: MACQUARIE UNIVERSITY
    Inventors: David James Spence, David Coutts, Richard Paul Mildren, Helen Margaret Pask, Jipeng Lin, Aravindan Warrier
  • Publication number: 20170163004
    Abstract: A method and system for generating a Raman second Stokes light to a source light comprising generating a Raman first Stokes light from the source light by a Raman interaction in a nonlinear optical medium disposed in an optical resonator, and resonating the Raman first Stokes light in the optical resonator; generating a seed light at the frequency of the Raman second Stokes light from the source light and the Raman first Stokes light by a four wave mixing process which is not phase matched in the nonlinear medium; amplifying the seed light by transferring power from the first Stokes light resonating in the optical resonator to the seed light using a Raman amplification process in the nonlinear medium; and extracting from the optical resonator a majority of the power of the seed light so amplified.
    Type: Application
    Filed: November 27, 2014
    Publication date: June 8, 2017
    Inventors: David James SPENCE, David COUTTS, Richard Paul MILDREN, Helen Margaret PASK, Jipeng LIN, Aravindan WARRIER
  • Patent number: 9586426
    Abstract: An apparatus, method and non-transitory computer readable medium for printing on a profile of a printing medium having an irregular surface are disclosed. For example, the apparatus includes a print bar having one or more print heads, a shuttle, a loading carriage for holding the printing medium, wherein the loading carriage is coupled to the shuttle, a profile template coupled to the loading carriage via a cam follower and a controller coupled to the print bar and the shuttle, wherein the controller controls movement of the shuttle to cause the cam follower to move the loading carriage along a path that follows the profile of the printing medium and maintain a minimum print head gap during printing between the one or more print heads and the profile of the printing medium.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: March 7, 2017
    Assignee: Xerox Corporation
    Inventor: James Spence
  • Publication number: 20150325976
    Abstract: A laser configured to optimise output power at a desired wavelength, by suppression of unwanted Stokes orders in a Raman cascade, the laser comprising a resonating structure configured to resonate precursor light and Raman light frequencies, having a Raman medium configured to interact with the precursor resonating light to generate the Raman light; a control nonlinear medium configured to reduce an extraction of power from the precursor resonating light by the Raman process; and an output nonlinear medium configured to interact with the precursor resonating light to generate a desired output light thereby extracting power from the precursor resonating light; whereby the control nonlinear medium reduces the extraction of power from the precursor resonating light by the Raman process to enhance the extraction of power from the precursor resonating light by the output nonlinear medium interacting with the precursor resonating light thereby increasing the power of desired output the light.
    Type: Application
    Filed: July 5, 2013
    Publication date: November 12, 2015
    Applicant: Macquarie University
    Inventors: David James Spence, Helen Margaret Pask, Andrew Lee
  • Publication number: 20140269787
    Abstract: A tunable lasing device including a vertical external cavity surface emitting laser, adapted to generate a fundamental laser beam in response to pumping from a pump source, said fundamental laser beam having a fundamental wavelength and a fundamental linewidth; a fundamental resonator cavity adapted to resonate the fundamental beam therein; a first optical element located within the fundamental resonator cavity for control of the fundamental linewidth of the fundamental beam; a Raman resonator located at least partially in said fundamental resonator adapted to receive the fundamental beam and comprising therein, a solid state Raman active medium located therein for generating at least a first Stokes beam from the fundamental beam wherein said Raman resonator cavity is adapted to resonate said Stokes beam therein and further adapted to emit an output beam; and further comprising a nonlinear medium located within the Raman resonator cavity for nonlinear frequency conversion of at least one of the beams present
    Type: Application
    Filed: November 9, 2012
    Publication date: September 18, 2014
    Applicant: Macquarie University
    Inventors: Jipeng Lin, Helen M. Pask, David James Spence, Craig J. Hamilton, Graeme P. Malcolm
  • Patent number: 8668318
    Abstract: A leveling and spreading system has been developed that enables the speed and position of the web to be determined from a sensor on a first roller. In a duplex print process, the first roller also reduces a temperature of the media web and an ink image printed in the first side print operation to within a first predetermined temperature range. A second roller modulates the temperature of the media web and ink ejected onto the media web immediately before the web enters the leveling and spreading system to within a second predetermined temperature range to enable uniformity of the ink and web temperatures for spreading the ink in a nip formed with a third roller.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: March 11, 2014
    Assignee: Xerox Corporation
    Inventors: James M. Chappell, Jason M. LeFevre, James E. Williams, Paul McConville, Paul S. Bonino, James Spence, Roger G. Leighton, Michael F. Leo, Joseph C. Sheflin, Michael J. Levy, Howard A. Mizes
  • Publication number: 20140028747
    Abstract: A leveling and spreading system has been developed that enables the speed and position of the web to be determined from a sensor on a first roller. In a duplex print process, the first roller also reduces a temperature of the media web and an ink image printed in the first side print operation to within a first predetermined temperature range. A second roller modulates the temperature of the media web and ink ejected onto the media web immediately before the web enters the leveling and spreading system to within a second predetermined temperature range to enable uniformity of the ink and web temperatures for spreading the ink in a nip formed with a third roller.
    Type: Application
    Filed: July 26, 2012
    Publication date: January 30, 2014
    Applicant: XEROX CORPORATION
    Inventors: James M. Chappell, Jason M. LeFevre, James E. Williams, Paul McConville, Paul S. Bonino, James Spence, Roger G. Leighton, Michael F. Leo, Joseph C. Sheflin, Michael J. Levy, Howard A. Mizes
  • Patent number: 8345717
    Abstract: A continuous wave Raman laser for producing visible laser output comprising: a resonator cavity; at least a first reflector and a second reflector said first and second reflectors being located at opposite ends of the resonator cavity; a laser gain medium located in the resonator cavity for generating a continuous wave fundamental beam which resonates within the resonator cavity when pumped by a pump beam from a pump source external to the resonator cavity; a solid Raman-active medium positioned in the resonator cavity for Raman shifting the fundamental beam to produce a continuous wave Raman beam which resonates within the resonator cavity; and a non-linear medium positioned in the resonator cavity for frequency converting the continuous wave Raman beam to a converted wavelength to produce a continuous wave converted beam.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: January 1, 2013
    Assignee: Macquarie University
    Inventors: Peter Dekker, Helen Margaret Pask, James Austin Piper, David James Spence
  • Publication number: 20120263196
    Abstract: A Raman laser system, the system comprising a resonator cavity comprising a plurality of reflectors, wherein at least one reflector is an output reflector adapted for outputting a pulsed output beam from the resonator cavity at a frequency corresponding to a Raman shifted frequency of the pump beam, wherein the output reflector is partially transmitting at the Raman-converted frequency; a solid state Raman-active medium located in the resonator cavity to be pumped by a pulsed pump beam having a pump repetition rate and for Raman-converting a pump pulse incident on the Raman-active medium to a resonating pulse at a Raman-converted frequency resonating in the resonator cavity; a resonator adjuster for adjusting the optical length of the resonator to match the round-trip time of the resonating Raman-converted pulse with the pump beam repetition rate such that the resonating pulse is coincident both temporally and spatially with a pump pulse in the Raman-active medium on each round trip, to Raman amplify the reso
    Type: Application
    Filed: December 22, 2010
    Publication date: October 18, 2012
    Inventors: Helen Margaret Pask, David James Spence, Eduardo Granados, Richard Paul Mildren
  • Publication number: 20100054284
    Abstract: A continuous wave Raman laser for producing visible laser output comprising: a resonator cavity; at least a first reflector and a second reflector said first and second reflectors being located at opposite ends of the resonator cavity; a laser gain medium located in the resonator cavity for generating a continuous wave fundamental beam which resonates within the resonator cavity when pumped by a pump beam from a pump source external to the resonator cavity; a solid Raman-active medium positioned in the resonator cavity for Raman shifting the fundamental beam to produce a continuous wave Raman beam which resonates within the resonator cavity; and a non-linear medium positioned in the resonator cavity for frequency converting the continuous wave Raman beam to a converted wavelength to produce a continuous wave converted beam.
    Type: Application
    Filed: April 5, 2007
    Publication date: March 4, 2010
    Inventors: Peter Dekker, Helen Margaret Pask, James Austin Pipes, David James Spence
  • Publication number: 20070243762
    Abstract: A hermetic pressure connector which provides a pressure-tight, electrically conductive connection through a hole in a bulkhead. The connector includes a transverse support member having a high pressure side and an opposite low pressure side. A passage extends through the transverse support member between the opposite sides. A conductor pin having an axial portion extends through the passage. An insulating sleeve surrounds at least the axial portion of the conductor pin, thereby electrically insulating the transverse support member from the conductor pin. A molded connected body surrounds at least a central portion of the conductor pin at least at one of the high and low pressure sides to thereby mechanically support the conductor pin in the passage. The molded connector body is directly sealingly engaged with the conductor pin, the insulating sleeve and the transverse support member.
    Type: Application
    Filed: June 19, 2007
    Publication date: October 18, 2007
    Applicant: Greene, Tweed of Delaware, Inc.
    Inventors: Charles Burke, Ronald Taylor, Steven Fraley, James Spence, Martin Tomek, Trung Nguyen
  • Publication number: 20070127957
    Abstract: A floor standing and environmentally isolated external fusing module dockable with a first external module surround frame surrounding a xerographic toner image marking module is provided and includes (a) a fusing apparatus for receiving from the xerographic toner image marking module a copy sheet carrying an un-fused toner image thereon to heat and permanently fix the toner image onto the copy sheet; (b) a second external module surround frame for surrounding and isolating fusing volatiles from the fusing apparatus to prevent the fusing volatiles from contaminating an imageable surface and wire charging devices in the xerographic toner image marking module, the second external module surround frame having a second set of sheet-path interface and module-to-module docking devices for docking with the xerographic toner image marking module; and (c) floor standing casters mounted to a bottom of the second external module surround frame for movably supporting the floor standing and environmentally isolated externa
    Type: Application
    Filed: December 7, 2005
    Publication date: June 7, 2007
    Inventors: James Spence, Michael Martin, Mark Amico
  • Publication number: 20070059044
    Abstract: A trickle collection system including a trickle port formed in a developer housing and communicating with the interior of the developer housing, and a trickle port housing communicating the trickle port with an external vacuum collection source. The trickle port may include an aperture having a variable cross-section, for controlling an amount of flow of trickle through the trickle port. The trickle collection system also may include an air infusion port communicating the interior of the trickle port housing with external air and providing infusion of an amount of external air into the trickle port housing sufficient to facilitate flow of trickle from the trickle port to the external vacuum collection system. An aperture of the air infusion port may be variable, such that the amount of air infusion may be varied in accordance with internal and/or external conditions.
    Type: Application
    Filed: September 13, 2005
    Publication date: March 15, 2007
    Applicant: XEROX CORPORATION
    Inventors: Todd Preston, Richard Kalb, James Spence, Robert Pictor
  • Publication number: 20070024689
    Abstract: Systems and methods of a multiple dispensing system may include an image carrier, and may include a plurality of substantially aligned developing units positioned to develop image information on the image carrier. Each developing unit may include only one ink container and only one developer housing. The systems and method may also include a first dispensing system positioned upstream in a sheet feed direction of the plurality of substantially aligned developing units. The first dispensing system may include a first ink container and a first developer housing. The first developer housing may be configured to receive first imaging media from the first ink container and second imaging media from at least one other ink supply source.
    Type: Application
    Filed: July 29, 2005
    Publication date: February 1, 2007
    Applicant: XEROX CORPORATION
    Inventors: Todd Preston, Richard Kalb, James Spence, Wayne Drinkwater, Michael Martin, Robert Pictor
  • Publication number: 20060291899
    Abstract: A printing system that receives an imaging media cartridge includes a rail and a dock to install the imaging media cartridge. The imaging media cartridge includes a housing that has pivots along an alignment axis substantially parallel to the rail. The imaging media cartridge further includes a roller that slides along the rail, the roller being disposed on the housing. The imaging media cartridge also includes a bracket disposed on the housing. To insert the bracket into the dock, the housing rotates on the pivots. To further adjust the position of the imaging media cartridge in the xerographic system, the housing rotates along at least one axis substantially orthogonal to the alignment axis. The rail includes a support beam and a flange. The roller includes at least a pair of wheel housings, each wheel housing having a pair of tandem wheels that glide along the rail. The tandem wheels face each other and glide along the flange and between the support beam.
    Type: Application
    Filed: June 28, 2005
    Publication date: December 28, 2006
    Applicant: XEROX CORPORATION
    Inventors: Todd Preston, Richard Kalb, James Spence
  • Publication number: 20060290085
    Abstract: A transportable device, such as a cart, for transporting and elevating an imaging media cartridge into a press printer may include a base platform, first and second elevation members disposed thereon, a panel disposed between the first and second elevation members, and first and second elevator platforms. The panel may include a pair of opposite vertical faces along which the elevator platforms slide to mutually exchange elevations by vertically sliding the platforms in opposite directions. The device may be used for a method of transporting and elevating an imaging media cartridge into a press printer at an installation height above a floor. Additionally, the device may be used for a method of removing and storing an imaging media cartridge from a press printer at an installation height above the floor.
    Type: Application
    Filed: June 28, 2005
    Publication date: December 28, 2006
    Applicant: XEROX CORPORATION
    Inventors: Todd Preston, Richard Kalb, James Spence
  • Publication number: 20060183373
    Abstract: An apparatus includes a pair of connectors, two or more conductive paths formed in each connector in the pair of connectors, and a shroud encompassing at least a portion of the pair of connectors. The pair of connectors includes a first connector and a second connector. The first connector is substantially more flexible than the second connector, and each connector in the pair of connectors includes a bulkhead. Each of the two or more conductive paths in each connector in the pair of connectors is electrically isolated from all other conductive elements in the pair of connectors. The shroud is located between the bulkheads and disposed about the pair of connectors when the pair of connectors are coupled together electrically.
    Type: Application
    Filed: July 5, 2005
    Publication date: August 17, 2006
    Inventors: Michael Finke, Jesse Hensarling, Randal Beste, Charles Burke, James Spence