Patents by Inventor Barret Lippey

Barret Lippey 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).

  • Raman Despeckling with Spectral Control
    Publication number: 20150309325
    Abstract: An apparatus and method for controlling the spectrum of stimulated Raman scattering that is used for despeckling of digitally projected images. The stimulated Raman scattering is utilized to add wavelength diversity for reduced speckle and to change the color of the light to a more desirable combination of wavelengths. Digital projection with color-sequential projectors may be enabled by alternately switching the Raman spectrum between green and red. Improved projector transmission may be achieved by minimizing the amount of yellow light generated in the Raman spectrum.
    Type: Application
    Filed: April 23, 2014
    Publication date: October 29, 2015
    Applicant: Laser Light Engines, Inc.
    Inventors: Ian Lee, Barret Lippey, John Arntsen
  • Laser Projection System with Potassium Gadolinium Tungstate
    Publication number: 20150277136
    Abstract: An apparatus and method for enhancing light using stimulated Raman scattering in a potassium gadolinium tungstate (KGW) crystal. The stimulated Raman scattering is utilized to add wavelength diversity for reduced speckle and to change the color of the light to a more desirable combination of wavelengths. Digital projection is one application that may benefit from lower speckle and shifted color. Color-based stereoscopic projection is enabled by the addition of stimulated Raman bands at specific wavelengths.
    Type: Application
    Filed: March 31, 2014
    Publication date: October 1, 2015
    Applicant: Laser Light Engines, Inc.
    Inventors: Barret Lippey Lippey, Ian Lee
  • Configurable Optical Coupling
    Publication number: 20150212272
    Abstract: An apparatus and method for flexible configuring of optical fibers to illuminate digital projectors. The optical fibers are attached to various positions of a configurable back plane assembly and a condensing assembly condenses the light beams prior to launch into the projector. Horizontal and vertical launch symmetries are maintained for any number of optical fibers between 1 and 9.
    Type: Application
    Filed: January 30, 2014
    Publication date: July 30, 2015
    Inventors: John Arntsen, Barret Lippey
  • Laser projection system with improved bit depth
    Patent number: 8988765
    Abstract: An apparatus and method for despeckling that includes a green laser diode assembly, a pulsed laser with a repetition rate of less than 100 kHz, and stimulated Raman scattering light formed in an optical fiber. The laser diode light and stimulated Raman scattering light are combined to form a projected digital image. The green laser diode assembly or the pulsed laser is switched to improve the bit depth of the projected digital image.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: March 24, 2015
    Inventors: John O'Hara, John Arntsen, Barret Lippey
  • Single-display color 3D method and apparatus
    Patent number: 8928970
    Abstract: A method of stereoscopic image formation that includes some or all of the following steps: generating a laser beam, switching the laser beam alternately between a path that includes a stimulated-Raman-scattering optical fiber and a path that does not include a stimulated-Raman-scattering optical fiber, and filtering the output of the stimulated-Raman-scattering optical fiber to reduce the residual non-stimulated-Raman-scattering light.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: January 6, 2015
    Assignee: Laser Light Engines
    Inventors: John Arntsen, Barret Lippey
  • Despeckling apparatus and method
    Patent number: 8786940
    Abstract: An apparatus and method that reduces laser speckle by using stimulated Raman scattering in an optical fiber. The fiber core diameter and length are selected to achieve a desired output color. An adjustable despeckler is formed by combining two optical fibers in parallel and adjusting the amount of light in each path.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: July 22, 2014
    Assignee: Laser Light Engines, Inc.
    Inventors: Barret Lippey, William Beck, Ian Turner
  • Despeckling Red Laser Light
    Publication number: 20140185130
    Abstract: A method of despeckling light that includes mixing high-speckle far-red laser light with low-speckle green laser light in amounts selected to achieve a desired color point in a digital image. The far-red laser light may be red laser diodes with wavelengths in the range of 640 to 680 nm. The green laser light may include stimulated-Raman-scattering light from an optical fiber. The desired color point may be DCI red or Rec. 709 red.
    Type: Application
    Filed: December 12, 2013
    Publication date: July 3, 2014
    Applicant: Laser Light Engines, Inc.
    Inventors: John Arntsen, Barret Lippey
  • Despeckling Stability
    Publication number: 20140177034
    Abstract: An apparatus and method that improves the stability of despeckling using stimulated Raman scattering in an optical fiber. Optical modes in the fiber are scrambled by physical movement of the optical fiber, focusing assembly, or laser beam. The improvement in stability may include a reduction in flicker or reduction in long-term drift.
    Type: Application
    Filed: February 28, 2014
    Publication date: June 26, 2014
    Inventors: Barret Lippey, Ian Lee, John Arntsen, Rick Posch
  • Despeckling of Continuous-Wave Lasers
    Publication number: 20140160442
    Abstract: An apparatus and method that reduces speckle from continuous-wave lasers by using stimulated Raman scattering in an optical fiber. The fiber core diameter and length are selected to achieve a desired output color and level of despeckling. Single-mode fiber may be utilized to achieve a sufficiently high power density to generate stimulated Raman scattering.
    Type: Application
    Filed: February 18, 2014
    Publication date: June 12, 2014
    Inventors: Ian Lee, Barret Lippey
  • Projection Systems with Despeckled Laser Light
    Publication number: 20140133024
    Abstract: An apparatus and method for the projection of stereoscopic images that includes a pulsed laser that generates green light and an optical fiber that generates stimulated Raman scattered light. The stimulated Raman scattering light is divided into green light and red light and the colors are used to form stereoscopic images. Additional lasers may be added to meet specific primary color targets and to balance the brightness of the images for each eye.
    Type: Application
    Filed: January 17, 2014
    Publication date: May 15, 2014
    Inventors: Barret Lippey, John Arntsen, Len Hayes
  • Despeckling Apparatus and Method
    Publication number: 20140111847
    Abstract: An apparatus and method that reduces laser speckle by using stimulated Raman scattering in an optical fiber. The fiber core diameter and length are selected to achieve a desired output color. An adjustable despeckler is formed by combining two optical fibers in parallel and adjusting the amount of light in each path.
    Type: Application
    Filed: December 23, 2013
    Publication date: April 24, 2014
    Applicant: LASER LIGHT ENGINES, INC.
    Inventors: Barret Lippey, Ian Turner, William Brady Beck, Katherine Snell
  • Low-speckle projection screen
    Patent number: 8687272
    Abstract: A projection screen that reduces speckle by separating reflective flakes by at least 100 micrometers. The reflective flakes are held in a binder material that is coated on a backing layer. In a laser projection system, the separation distance between reflective flakes may be at least twice the coherence length of the laser light.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: April 1, 2014
    Assignee: Laser Light Engines, Inc.
    Inventors: Barret Lippey, Ian Turner
  • Green and Red Despeckling
    Publication number: 20130329755
    Abstract: An apparatus and method for despeckling that includes a pulsed green laser, a green laser diode assembly, and stimulated Raman scattering light formed in an optical fiber. The stimulated Raman scattering light is divided into green light and red light. The green light from the stimulated Raman scattering is combined with the green laser diode assembly to form a green primary light. The red light from the stimulated Raman scattering light forms a red primary light. The green primary light and the red primary light are used to project a digital image.
    Type: Application
    Filed: August 12, 2013
    Publication date: December 12, 2013
    Applicant: Laser Light Engines, Inc.
    Inventors: John Arntsen, Barret Lippey
  • Short Pulse Despeckling
    Publication number: 20130278903
    Abstract: An apparatus and method for despeckling that includes a pulsed laser with a pulse width between 1 ps and 10 ns and stimulated Raman scattering light formed in an optical fiber. The stimulated Raman scattering light may be used to form a projected digital image. A second pulsed laser with a wavelength at least 2 nm different may be included and stimulated Raman scattering light formed in a second optical fiber may be combined with the stimulated Raman scattering light formed in the first optical fiber.
    Type: Application
    Filed: June 19, 2013
    Publication date: October 24, 2013
    Inventors: Barret Lippey, John Arntsen, William Brady Beck
  • Laser Projection System with Improved Bit Depth
    Publication number: 20130250401
    Abstract: An apparatus and method for despeckling that includes a green laser diode assembly, a pulsed laser with a repetition rate of less than 100 kHz, and stimulated Raman scattering light formed in an optical fiber. The laser diode light and stimulated Raman scattering light are combined to form a projected digital image. The green laser diode assembly or the pulsed laser is switched to improve the bit depth of the projected digital image.
    Type: Application
    Filed: May 13, 2013
    Publication date: September 26, 2013
    Applicant: Laser Light Engines, Inc.
    Inventors: John O'Hara, John Arntsen, Barret Lippey
  • Frequency Control of Despeckling
    Publication number: 20130021586
    Abstract: A method and apparatus that reduces laser speckle by using stimulated Raman scattering in an optical fiber. The pulse repetition frequency of the laser is adjusted to control aspects of the laser light such as color or despeckling. In DLP projection systems, an optical monitor may be used to send information to a bit sequence, and the bit sequence may control the pulse repetition frequency of the laser based on the optical monitor signal.
    Type: Application
    Filed: September 25, 2012
    Publication date: January 24, 2013
    Applicant: LASER LIGHT ENGINES
    Inventor: Barret Lippey
  • Laser Display Method and System
    Publication number: 20120219021
    Abstract: A laser display system and method that includes some or all of the following parts: an optical apparatus that includes two spatial light modulators and a laser, and switches the laser between the light modulators; two lasers that combine pulses to illuminate one spatial light modulator; controlling a laser Q-switch to stay in CW mode for variable periods of time to generate variable-amplitude pulses; and loading and resetting a digital micromirror device between pulses of light.
    Type: Application
    Filed: February 15, 2012
    Publication date: August 30, 2012
    Applicant: LASER LIGHT ENGINES
    Inventors: Barret Lippey, Ian Lee, Ian Turner, Gary Styskal
  • Speckle Reduction Method
    Publication number: 20120170110
    Abstract: A method of despeckling light that includes mixing high-speckle laser light with low-speckle laser light in amounts selected to achieve a desired color point in a digital image. The high speckle laser light may be red laser diodes and the low-speckle laser light may be green stimulated-Raman-scattering light from an optical fiber. The desired color point may be DCI red or Rec. 709 red.
    Type: Application
    Filed: March 14, 2012
    Publication date: July 5, 2012
    Applicant: LASER LIGHT ENGINES
    Inventors: Barret Lippey, William Beck
  • Single-Display Color 3D Method and Apparatus
    Publication number: 20120140320
    Abstract: A method of stereoscopic image formation that includes some or all of the following steps: generating a laser beam, switching the laser beam alternately between a path that includes a stimulated-Raman-scattering optical fiber and a path that does not include a stimulated-Raman-scattering optical fiber, and filtering the output of the stimulated-Raman-scattering optical fiber to reduce the residual non-stimulated-Raman-scattering light.
    Type: Application
    Filed: February 14, 2012
    Publication date: June 7, 2012
    Applicant: LASER LIGHT ENGINES
    Inventors: John Arntsen, Barret Lippey
  • Anti-Moire Optical System and Method
    Publication number: 20120002278
    Abstract: A three-dimensional optical display system and method that reduces moiré patterns formed between the image display panel and a 3D lens. The reduction of moiré patterns may be achieved by adding a lenticular anti-moiré lens or by curving the 3D lens into a convex shape. The anti-moiré lens may have a regular period, or may incorporate random elements.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 5, 2012
    Applicant: MAGNETIC MEDIA HOLDINGS, INC.
    Inventors: Thomas Zerega, James Zahakos, Barret Lippey