Patents by Inventor Alban N Lescure
Alban N Lescure 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).
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Patent number: 9030749Abstract: A bifocal head-up display system includes a projector, at least one projection surface in an intermediate image plane, and relay optics to direct a display image to a reflector in a vehicle operator's field of view. The display image includes two image portions focused at different distances from the vehicle operator. A first image portion focused at a first distance may include information related to vehicle operation, and a second image portion focused at a second distance may include to information related to extra-vehicular objects.Type: GrantFiled: August 1, 2012Date of Patent: May 12, 2015Assignee: Microvision, Inc.Inventors: Alban N. Lescure, Markus Duelli, Joshua O. Miller, Lansing B. Evans
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Publication number: 20140036374Abstract: A bifocal head-up display system includes a projector, at least one projection surface in an intermediate image plane, and relay optics to direct a display image to a reflector in a vehicle operator's field of view. The display image includes two image portions focused at different distances from the vehicle operator. A first image portion focused at a first distance may include information related to vehicle operation, and a second image portion focused at a second distance may include to information related to extra-vehicular objects.Type: ApplicationFiled: August 1, 2012Publication date: February 6, 2014Applicant: MICROVISION INC.Inventors: Alban N. Lescure, Markus Duelli, Joshua O. Miller, Lansing B. Evans
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Patent number: 8567957Abstract: A laser-based imaging system (200) is configured to reduce perceived speckle in images (201). The imaging system (200) includes one or more laser sources (207), a light modulator (204) configured to produce the images (201) with light (205) from the laser sources (207), and one or more active polarization switches (206) disposed in an optical path of the imaging system (200). The active polarization switch (206) is configured to alternate a polarization orientation of the light in synchrony with an image refresh cycle of the system. The active polarization switch can be clocked in accordance with a clocking angle to optimize speckle reduction. Additionally, one or more light preconditioners (991,992) may be used to help optimize speckle reduction.Type: GrantFiled: July 11, 2011Date of Patent: October 29, 2013Assignee: Microvision, Inc.Inventors: Markus Duelli, Mark O. Freeman, Christian Dean DeJong, Alban N. Lescure
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Patent number: 8395714Abstract: An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). Optional optical alignment devices (220) can be used to orient the light beams (204) into a combined light beam (205). A beam separator (221), which can be any of a birefringent wedge, compensated birefringent wedge, or a polymerized liquid crystal layer, is disposed between at least one of the laser sources (201) and the light modulator (203). The beam separator (221) is configured to receive light from the laser sources (201) and deliver two angularly separated and orthogonally polarized light beams (223) to the light modulator (203) so as to reduce speckle appearing when the images (206) are displayed on a display surface (207).Type: GrantFiled: September 4, 2009Date of Patent: March 12, 2013Assignee: Microvision, Inc.Inventors: Alban N. Lescure, Markus Duelli, Mark O. Freeman
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Publication number: 20130016321Abstract: A laser-based imaging system (200) is configured to reduce perceived speckle in images (201). The imaging system (200) includes one or more laser sources (207), a light modulator (204) configured to produce the images (201) with light (205) from the laser sources (207), and one or more active polarization switches (206) disposed in an optical path of the imaging system (200). The active polarization switch (206) is configured to alternate a polarization orientation of the light in synchrony with an image refresh cycle of the system. The active polarization switch can be clocked in accordance with a clocking angle to optimize speckle reduction. Additionally, one or more light preconditioners (991,992) may be used to help optimize speckle reduction.Type: ApplicationFiled: July 11, 2011Publication date: January 17, 2013Applicant: MICROVISION, INC.Inventors: Markus Duelli, Mark O. Freeman, Christian Dean DeJong, Alban N. Lescure
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Patent number: 8308302Abstract: An imaging system (200) is configured to reduce perceived speckle (106) in images (201) by introducing angular diversity into consecutively projected images. The imaging system (200) includes one or more laser sources (203) that are configured to produce one or more light beams (215). A light modulator (204) scans these light beams (215) to produce images. A light translation element (206) introduces the angular diversity by physically altering a light reception location (208) on the light modulator (204) between refresh sweeps. To preserve image stability, image data (220) in a memory (218) can be correspondingly shifted.Type: GrantFiled: July 13, 2010Date of Patent: November 13, 2012Assignee: Microvision, Inc.Inventors: Alban N. Lescure, Markus Duelli, Mark O. Freeman
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Patent number: 8287128Abstract: An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). A polarization diversity element (221), which can be manufactured from a birefringent material or from a polymerized liquid crystal layer, is disposed within the imaging system (200). The polarization diversity element (221) is configured to alter the polarization of an incident beam to create a transmitted beam comprising diverse polarization patterns, thereby reducing speckle in projected images.Type: GrantFiled: October 5, 2009Date of Patent: October 16, 2012Assignee: Microvision, Inc.Inventors: Alban N. Lescure, Markus Duelli, Mark O. Freeman, Witold R. Teller
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Patent number: 8231224Abstract: Briefly, in accordance with one or more embodiments, beam position diversity or beam offset diversity in pupil space performs the complement to angular diversity by maintaining angular content of a beam while changing its position and/or polarization properties in pupil space over time.Type: GrantFiled: June 11, 2009Date of Patent: July 31, 2012Assignee: Microvision, Inc.Inventors: Karlton D. Powell, Mark O. Freeman, Alban N. Lescure
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Patent number: 8152307Abstract: A optical apparatus (201) for use in an laser imaging system (200) is provided. The optical apparatus (201) includes one or more optical elements (215) that are configured to create an intermediate image plane (217) in the laser imaging system (200). A diffractive optical element (216) is then disposed at the intermediate image plane (217) to reduce speckle. The diffractive optical element (216) includes a periodically repeating phase mask (218) that can be configured in accordance with steps, vortex functions, Hermite-Gaussian functions, and so forth. Smooth grey-level phase transitional surface (337) can be placed between elements (333,334) to improve brightness and image quality. The periodically repeating phase mask (218) makes manufacture simple by reducing alignment sensitivity, and can be used to make applicable safety standards easier to meet as well.Type: GrantFiled: December 21, 2009Date of Patent: April 10, 2012Assignee: Microvision, Inc.Inventors: Markus Duelli, Alban N. Lescure, Mark O. Freeman, Christian Dean DeJong, Joshua M. Hudman
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Publication number: 20120013855Abstract: An imaging system (200) is configured to reduce perceived speckle (106) in images (201) by introducing angular diversity into consecutively projected images. The imaging system (200) includes one or more laser sources (203) that are configured to produce one or more light beams (215). A light modulator (204) scans these light beams (215) to produce images. A light translation element (206) introduces the angular diversity by physically altering a light reception location (208) on the light modulator (204) between refresh sweeps. To preserve image stability, image data (220) in a memory (218) can be correspondingly shifted.Type: ApplicationFiled: July 13, 2010Publication date: January 19, 2012Applicant: MICROVISION, INC.Inventors: Alban N. Lescure, Markus Duelli, Mark O. Freeman
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Publication number: 20120013852Abstract: An imaging system (200) is configured to reduce perceived speckle in images (201) produced by the imaging system. The imaging system (200) includes one or more laser source pairs (205,206), with each laser source pair being configured to produce two beams (209,210) of a color. A spatial light modulator (211) is configured to produce the images (201) with light (212) from the source pairs by scanning the light (212) in a raster pattern (213) along a projection surface (202). A beam translator (225) is configured to cause lines of successive sweeps of the raster pattern (213) to be scanned with the two beams (221,222) on an alternating basis such that a line scanned by a first of the two beams in one sweep is scanned by a second of the two beams in a sequentially subsequent sweep. Other optical elements can introduce angular diversity to further reduce speckle, such as a beam shifter (2200) and a light translation element (990).Type: ApplicationFiled: July 13, 2010Publication date: January 19, 2012Applicant: MICROVISION, INC.Inventors: Mark Champion, Mark O. Freeman, Alban N. Lescure, Markus Duelli
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Patent number: 8049825Abstract: An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). Optional optical alignment devices (220) can be used to orient the light beams (204) into a combined light beam (205). A birefringent wedge (221) is disposed between at least one of the laser sources (201) and the light modulator (203). The birefringent wedge (221) is configured to receive light from the laser sources (201) and deliver two angularly separated and orthogonally polarized light beams (223) to the light modulator (203) so as to reduce speckle appearing when the images (206) are displayed on a display surface (207). An optional glass wedge (1004) can be used to correct optical path deviation (1001) introduced by the birefringent wedge (221).Type: GrantFiled: April 16, 2009Date of Patent: November 1, 2011Assignee: Microvision, Inc.Inventors: Alban N. Lescure, Markus Duelli, Mark O. Freeman
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Patent number: 7972008Abstract: An image producing system (1400) delivers images (1414) having reduced speckle by employing one or more drive circuits (1404, 1405, 1406) that deliver both a direct current drive signal (205) and an alternating current drive signal (405) to one or more lasers (1401, 1402, 1403). Specifically, an alternating current drive circuit (403) is used in conjunction with a direct current drive circuit (203) to modulate a drive signal. The modulation can be at a frequency of between 400 MHz and 600 MHz. When lasers, such as the red laser (1401) or the blue laser (1403) of a multi-laser system are modulated in such a fashion, their emitted spectral widths (407) greatly expand, thereby reducing speckle in projected images (1414).Type: GrantFiled: October 21, 2008Date of Patent: July 5, 2011Assignee: Microvision, Inc.Inventors: Witold R Teller, Alban N Lescure, Mark O. Freeman
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Publication number: 20110149251Abstract: A optical apparatus (201) for use in an laser imaging system (200) is provided. The optical apparatus (201) includes one or more optical elements (215) that are configured to create an intermediate image plane (217) in the laser imaging system (200). A diffractive optical element (216) is then disposed at the intermediate image plane (217) to reduce speckle. The diffractive optical element (216) includes a periodically repeating phase mask (218) that can be configured in accordance with steps, vortex functions, Hermite-Gaussian functions, and so forth. Smooth grey-level phase transitional surface (337) can be placed between elements (333,334) to improve brightness and image quality. The periodically repeating phase mask (218) makes manufacture simple by reducing alignment sensitivity, and can be used to make applicable safety standards easier to meet as well.Type: ApplicationFiled: December 21, 2009Publication date: June 23, 2011Applicant: MICROVISION, INC.Inventors: Markus Duelli, Alban N. Lescure, Mark O. Freeman, Christian Dean DeJong, Joshua M. Hudman
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Publication number: 20100315597Abstract: Briefly, in accordance with one or more embodiments, beam position diversity or beam offset diversity in pupil space performs the complement to angular diversity by maintaining angular content of a beam while changing its position and/or polarization properties in pupil space over time.Type: ApplicationFiled: June 11, 2009Publication date: December 16, 2010Applicant: MICROVISION, INC.Inventors: Karlton D. Powell, Mark O. Freeman, Alban N. Lescure
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Publication number: 20100265467Abstract: An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). A polarization diversity element (221), which can be manufactured from a birefringent material or from a polymerized liquid crystal layer, is disposed within the imaging system (200). The polarization diversity element (221) is configured to alter the polarization of an incident beam to create a transmitted beam comprising diverse polarization patterns, thereby reducing speckle in projected images.Type: ApplicationFiled: October 5, 2009Publication date: October 21, 2010Applicant: MICROVISION, INC.Inventors: Alban N. Lescure, Markus Duelli, Mark O. Freeman, Witold R. Teller
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Publication number: 20100265466Abstract: An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). Optional optical alignment devices (220) can be used to orient the light beams (204) into a combined light beam (205). A birefringent wedge (221) is disposed between at least one of the laser sources (201) and the light modulator (203). The birefringent wedge (221) is configured to receive light from the laser sources (201) and deliver two angularly separated and orthogonally polarized light beams (223) to the light modulator (203) so as to reduce speckle appearing when the images (206) are displayed on a display surface (207). An optional glass wedge (1004) can be used to correct optical path deviation (1001) introduced by the birefringent wedge (221).Type: ApplicationFiled: April 16, 2009Publication date: October 21, 2010Applicant: Microvision, Inc.Inventors: Alban N. Lescure, Markus Duelli, Mark O. Freeman
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Publication number: 20100265420Abstract: An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). Optional optical alignment devices (220) can be used to orient the light beams (204) into a combined light beam (205). A beam separator (221), which can be any of a birefringent wedge, compensated birefringent wedge, or a polymerized liquid crystal layer, is disposed between at least one of the laser sources (201) and the light modulator (203). The beam separator (221) is configured to receive light from the laser sources (201) and deliver two angularly separated and orthogonally polarized light beams (223) to the light modulator (203) so as to reduce speckle appearing when the images (206) are displayed on a display surface (207).Type: ApplicationFiled: September 4, 2009Publication date: October 21, 2010Applicant: MICROVISION, INC.Inventors: Alban N. Lescure, Markus Duelli, Mark O. Freeman
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Publication number: 20100232005Abstract: Briefly, in accordance with one or more embodiments, a scanned beam display comprises one or more light sources to generate one or more light beams, a scanner module to receive the one or more light beams to generate a displayed image via scanning of the light beams onto a projection surface, and a spatial phase modulator disposed between the light source and the scanner module to phase modulate the one or more light beams to provide speckle reduction in the display image projected onto the projection surface.Type: ApplicationFiled: March 12, 2009Publication date: September 16, 2010Applicant: Microvision, Inc.Inventors: Alban N. Lescure, Mark O. Freeman, Christian Dean DeJong, Maarten Niesten, Joshua M. Hudman
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Publication number: 20100097534Abstract: An image producing system (1400) delivers images (1414) having reduced speckle by employing one or more drive circuits (1404, 1405, 1406) that deliver both a direct current drive signal (205) and an alternating current drive signal (405) to one or more lasers (1401, 1402, 1403). Specifically, an alternating current drive circuit (403) is used in conjunction with a direct current drive circuit (203) to modulate a drive signal. The modulation can be at a frequency of between 400 MHz and 600 MHz. When lasers, such as the red laser (1401) or the blue laser (1403) of a multi-laser system are modulated in such a fashion, their emitted spectral widths (407) greatly expand, thereby reducing speckle in projected images (1414).Type: ApplicationFiled: October 21, 2008Publication date: April 22, 2010Applicant: MICROVISION, INC.Inventors: Witold R. Teller, Alban N. Lescure, Mark O. Freeman