Patents Assigned to LASER LIGHT ENGINES
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Patent number: 10678061Abstract: An optical system and method that utilize multiple low-etendue lasers to illuminate multiple spots one or more spatial light modulators. Stereoscopic systems may be formed by using different wavelengths or different polarizations for each spot. Light from each spot is guided to each eye of the viewer by wearing 3D glasses.Type: GrantFiled: February 28, 2014Date of Patent: June 9, 2020Assignee: Laser Light Engines, Inc.Inventor: William Brady Beck
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Patent number: 9715123Abstract: 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: GrantFiled: August 12, 2013Date of Patent: July 25, 2017Assignee: Laser Light Engines, Inc.Inventors: John Arntsen, Barret Lippey
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Patent number: 9599835Abstract: 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: GrantFiled: January 17, 2014Date of Patent: March 21, 2017Assignee: Laser Light Engines, Inc.Inventors: Barret Lippey, John Arntsen, Len Hayes
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Patent number: 9529202Abstract: 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: GrantFiled: April 23, 2014Date of Patent: December 27, 2016Assignee: Laser Light Engines, Inc.Inventors: Ian Lee, Barret Lippey, John Arntsen
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Patent number: 9395597Abstract: A stereoscopic projection system and method of generating light that include two or three infrared lasers, two optical parametric oscillators, and six or seven second harmonic generators. Six colors of visible light are produced. Three bands of red, green, and blue form an image for the left eye of the viewer, while the other three bands of red, green, and blue form an image for the right eye of the viewer.Type: GrantFiled: March 4, 2014Date of Patent: July 19, 2016Assignee: Laser Light Engines, Inc.Inventor: Ian Turner
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Patent number: 9261650Abstract: 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: GrantFiled: January 30, 2014Date of Patent: February 16, 2016Assignee: Laser Light Engines, Inc.Inventors: John Arntsen, Barret Lippey
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Publication number: 20150309325Abstract: 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: ApplicationFiled: April 23, 2014Publication date: October 29, 2015Applicant: Laser Light Engines, Inc.Inventors: Ian Lee, Barret Lippey, John Arntsen
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Publication number: 20150277136Abstract: 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: ApplicationFiled: March 31, 2014Publication date: October 1, 2015Applicant: Laser Light Engines, Inc.Inventors: Barret Lippey Lippey, Ian Lee
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Patent number: 8928970Abstract: 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: GrantFiled: February 14, 2012Date of Patent: January 6, 2015Assignee: Laser Light EnginesInventors: John Arntsen, Barret Lippey
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Patent number: 8786940Abstract: 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: GrantFiled: December 7, 2010Date of Patent: July 22, 2014Assignee: Laser Light Engines, Inc.Inventors: Barret Lippey, William Beck, Ian Turner
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Publication number: 20140185130Abstract: 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: ApplicationFiled: December 12, 2013Publication date: July 3, 2014Applicant: Laser Light Engines, Inc.Inventors: John Arntsen, Barret Lippey
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Publication number: 20140185016Abstract: A stereoscopic projection system and method of generating light that include two or three infrared lasers, two optical parametric oscillators, and six or seven second harmonic generators. Six colors of visible light are produced. Three bands of red, green, and blue form an image for the left eye of the viewer, while the other three bands of red, green, and blue form an image for the right eye of the viewer.Type: ApplicationFiled: March 4, 2014Publication date: July 3, 2014Applicant: Laser Light Engines, Inc.Inventor: Ian Turner
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Publication number: 20140177049Abstract: An optical system and method that utilize multiple low-etendue lasers to illuminate multiple spots one or more spatial light modulators. Stereoscopic systems may be formed by using different wavelengths or different polarizations for each spot. Light from each spot is guided to each eye of the viewer by wearing 3D glasses.Type: ApplicationFiled: February 28, 2014Publication date: June 26, 2014Applicant: Laser Light Engines, Inc.Inventor: William Brady Beck
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Publication number: 20140176912Abstract: A stereoscopic display system and method of stereoscopic projection that include a polarization-switching light source and a polarization-preserving projector. The polarization state of the polarization-switching light source is synchronized with alternate projection of left-eye images and right-eye images. The polarization-switching light source may include a laser and a rotating disk, and the disk may include a waveplate that switches the polarization state as the disk rotates.Type: ApplicationFiled: March 4, 2014Publication date: June 26, 2014Applicant: Laser Light Engines, Inc.Inventor: Ian Turner
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Publication number: 20140177036Abstract: An optical system and method that use a pump laser, an optical parametric oscillator, and two second harmonic generators to generate three colors of laser light. A recirculating optical sub-system includes a gain-guided optical parametric oscillator and one of the second harmonic generators and has four lenses that form two collimated optical beams between the optical parametric oscillator and the second harmonic generator.Type: ApplicationFiled: March 3, 2014Publication date: June 26, 2014Applicant: Laser Light Engines, Inc.Inventor: David Coppeta
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Publication number: 20140111847Abstract: 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: ApplicationFiled: December 23, 2013Publication date: April 24, 2014Applicant: LASER LIGHT ENGINES, INC.Inventors: Barret Lippey, Ian Turner, William Brady Beck, Katherine Snell
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Patent number: 8687272Abstract: 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: GrantFiled: April 19, 2013Date of Patent: April 1, 2014Assignee: Laser Light Engines, Inc.Inventors: Barret Lippey, Ian Turner
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Publication number: 20130329755Abstract: 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: ApplicationFiled: August 12, 2013Publication date: December 12, 2013Applicant: Laser Light Engines, Inc.Inventors: John Arntsen, Barret Lippey
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Publication number: 20130250401Abstract: 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: ApplicationFiled: May 13, 2013Publication date: September 26, 2013Applicant: Laser Light Engines, Inc.Inventors: John O'Hara, John Arntsen, Barret Lippey
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Publication number: 20130162952Abstract: A method and apparatus for despeckling that includes a green laser diode, a DPSS laser, 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 output of the optical fiber may be split into two spectrums. The projected digital image may be stereoscopic with one image formed from the laser diode light and one spectrum, and the other image formed from the other spectrum.Type: ApplicationFiled: February 25, 2013Publication date: June 27, 2013Applicant: LASER LIGHT ENGINES, INC.Inventor: LASER LIGHT ENGINES, INC.