Patents by Inventor Kuohua Wu

Kuohua Wu 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).

  • Patent number: 7295293
    Abstract: A method of testing a coating on a reflector having a first focal point includes placing a mirror at the first focal point of the reflector and angled to orient with an area on the coating. Electromagnetic (EM) radiation is directed to the mirror which then directs the EM radiation on the area. The EM radiation which is reflected from the coating is collected onto a sensor disposed at a second focal point. The intensity of the EM radiation collected on the sensor is detected.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: November 13, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Anurag Gupta, Kuohua Wu, P. Guy Howard, Scott A Lerner, John Hellgeth, Terry Piper
  • Publication number: 20070258099
    Abstract: This invention relates to a self aligning optical printing system, comprising: an electromagnetic energy beam source capable of emitting a plurality of electromagnetic energy beams of differing wavelengths; a plurality of lenses located substantially adjacent to each other such that each of the plurality of electromagnetic energy beams interacts with one of the plurality of lenses to self align the plurality of electromagnetic energy beams with respect to each other; and a multi-wavelength media located adjacent to the plurality of lenses such that the plurality of self aligned electromagnetic energy beams interacts with the media.
    Type: Application
    Filed: May 5, 2006
    Publication date: November 8, 2007
    Inventors: Andrew Van Brocklin, Kuohua Wu
  • Publication number: 20070236556
    Abstract: For each of a number of regions of a label surface of a substrate that are to be optically written to form a human-readable image, a corresponding power level at which an optical beam is to impinge the region to optically write a desired mark to the region as part of the image is determined. The optical beam impinges the region by being switched on and off from a higher power level to a lower power level to achieve the corresponding power level on average. At least one of the following are adjusted: a number of times the optical beam is switched on and off, a length of time the optical beam remains on each time it is switched on, and a duty cycle of the optical beam while the optical beam is positioned over the region.
    Type: Application
    Filed: April 8, 2006
    Publication date: October 11, 2007
    Inventors: Kuohua Wu, Andrew Van Brocklin, Makarand Gore
  • Publication number: 20070217003
    Abstract: Embodiments of an optical device including at least two transparent layers are disclosed.
    Type: Application
    Filed: January 11, 2007
    Publication date: September 20, 2007
    Inventors: Gregory J. May, Kuohua Wu
  • Publication number: 20070206085
    Abstract: This invention relates to an optical mechanism comprising: an optical beam generating mechanism to generate an optical beam; and a unitary, transparent waveguide for guiding the optical beam to an optically writable surface wherein optical elements for guiding the optical beam are coated onto the waveguide to create a relatively compact optical system, a relatively low exit numerical aperture for the exit pupil, and for bending and re-directing the optical beam.
    Type: Application
    Filed: March 2, 2006
    Publication date: September 6, 2007
    Inventors: Andrew Van Brocklin, Kuohua Wu
  • Publication number: 20070097691
    Abstract: A cool light source includes a reflector having a band-reject reflective coating and an underlying absorptive coating. The cool light source also includes a window with a band-pass transmission function that is substantially complimentary to the band-reject reflective coating.
    Type: Application
    Filed: October 28, 2005
    Publication date: May 3, 2007
    Inventor: Kuohua Wu
  • Publication number: 20070091314
    Abstract: A method of testing a coating on a reflector having a first focal point includes placing a mirror at the first focal point of the reflector and angled to orient with an area on the coating. Electromagnetic (EM) radiation is directed to the mirror which then directs the EM radiation on the area. The EM radiation which is reflected from the coating is collected onto a sensor disposed at a second focal point. The intensity of the EM radiation collected on the sensor is detected.
    Type: Application
    Filed: October 21, 2005
    Publication date: April 26, 2007
    Inventors: Anurag Gupta, Kuohua Wu, P. Howard, Scott Lerner, John Hellgeth, Terry Piper
  • Publication number: 20070091943
    Abstract: A light source module includes a laser configured to generate infrared light, and a harmonic generating crystal is in optical communication with the laser. According to one exemplary embodiment, the harmonic generating crystal has a periodicity selected to provide a maximum output at an initial temperature. An actuator is coupled to the harmonic generating crystal and is configured to apply a restoring force to the harmonic generating crystal to maintain said periodicity over a temperature range.
    Type: Application
    Filed: October 20, 2005
    Publication date: April 26, 2007
    Inventors: Andrew Brocklin, Kuohua Wu
  • Publication number: 20070085982
    Abstract: An integrator device is provided in the present disclosure. The integrator device may be used in a display system. According to one exemplary embodiment, the integrator device includes at least one metallic substrate. An anti-reflective layer is formed on the substrate. In addition, a band-reject layer formed is on said anti-reflective layer.
    Type: Application
    Filed: October 18, 2005
    Publication date: April 19, 2007
    Inventors: Kuohua Wu, P. Howard, Kevin Hulick, Michael Long
  • Publication number: 20070082167
    Abstract: One embodiment of an optical medium includes a substrate, a data recording layer positioned on the substrate, a selectively transmissive layer positioned on the data recording layer, and a label recording layer positioned on the selectively transmissive layer, the label recording layer optically accessible at only certain wavelengths through the data recording layer and through the selectively transmissive layer.
    Type: Application
    Filed: October 12, 2005
    Publication date: April 12, 2007
    Inventors: Kuohua Wu, Andrew Van Brocklin
  • Publication number: 20070081070
    Abstract: One embodiment of an optical medium recording apparatus includes an optical medium support including a support surface, a first light source that projects a first recording light beam focused at a first position relative to the support surface, and a second light source that projects a second recording light beam focused at a second position relative to the support surface, the second position different from the first position, wherein the first recording light beam and the second recording light beam are both projected to the support surface in a single direction.
    Type: Application
    Filed: October 12, 2005
    Publication date: April 12, 2007
    Inventors: Kuohua Wu, Darwin Hanks
  • Publication number: 20070081248
    Abstract: A reflector includes a substrate having a first end and a second end and an optical coating of at least first and second materials having differing refractive indices deposited on the substrate. The optical coating includes a plurality of alternating layers of the first and second materials with each layer having a thickness which increases from the first end to the second end of the substrate.
    Type: Application
    Filed: October 11, 2005
    Publication date: April 12, 2007
    Inventor: Kuohua Wu
  • Publication number: 20070013998
    Abstract: A IR absorbing reflector is formed with a substrate that supports a first IR absorptive multilayer part having multiple layers of partial IR absorbing thin films. The first IR (infrared) absorptive multi-layer part supports a second visible light reflecting multilayer part.
    Type: Application
    Filed: July 12, 2005
    Publication date: January 18, 2007
    Inventors: Kuohua Wu, Anurag Gupta
  • Publication number: 20070002569
    Abstract: A method for forming a reflector includes depositing a decoupling material on an ultraviolet light and infra-red light absorption layer that is supported by a substrate which is spun.
    Type: Application
    Filed: July 1, 2005
    Publication date: January 4, 2007
    Inventors: Kurt Ulmer, Kuohua Wu
  • Publication number: 20060028621
    Abstract: An integral reflector and heat sink for use in a projector assembly is provided herein. The integral reflector and heat sink according to one exemplary embodiment includes a reflector portion having an integrated heat sink with a reflective surface and a non-reflective surface opposite the reflective surface. An emissivity treatment is applied to the non-reflective surface. The emissivity treatment is configured to increase a heat transfer rate through said non-reflective surface.
    Type: Application
    Filed: October 5, 2005
    Publication date: February 9, 2006
    Inventors: Anurag Gupta, David Erickson, Kuohua Wu