Patents by Inventor Alireza Moheghi
Alireza Moheghi 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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Publication number: 20230199167Abstract: An apparatus, system, and method for an eye-tracking optical verification tester are described herein. In some aspects, a heating element such as a Peltier or Thermoelectric Cooler “TEC” includes a see-through void and may be used to control a temperature of an eye-tracking optical element. An environmental enclosure that is configured to assist in simulation of an environmental condition may hold the eye-tracking optical element. The eye-tracking optical element is to receive reflected light from an eye-tracking target and direct the reflected light to an eye-tracking camera.Type: ApplicationFiled: March 31, 2022Publication date: June 22, 2023Inventors: Alireza Moheghi, Peter Jasinski, Justin Grimes
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Patent number: 11592681Abstract: A device includes a waveguide, an in-coupling element, and an out-coupling element coupled with the waveguide. The waveguide, the in-coupling element, and the out-coupling element are configured to deliver a plurality of portions of an image light to an eye-box of the device. At least one of the in-coupling element or the out-coupling element includes a polarization selective diffractive element. The polarization selective diffractive element includes a grating including a plurality of microstructures defining a plurality of grooves filled with a passive optically anisotropic material having a first effective refractive index along a groove direction of the grooves and a second effective refractive index along an in-plane direction perpendicular to the groove direction. One of the first effective refractive index or the second effective refractive index substantially matches with a refractive index of the microstructures.Type: GrantFiled: September 23, 2020Date of Patent: February 28, 2023Assignee: META PLATFORMS TECHNOLOGIES, LLCInventors: Oleg Yaroshchuk, Giuseppe Calafiore, Alireza Moheghi, Andrew Maimone, Barry David Silverstein
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Patent number: 11570413Abstract: An apparatus may include (1) a planar liquid-crystal structure including a plurality of liquid crystals, and (2) a plurality of electrodes coupled to the planar liquid-crystal structure such that (a) when a first plurality of voltages are applied to at least some of the plurality of electrodes, the plurality of liquid crystals are oriented such that the planar liquid-crystal structure operates as a diffraction grating having a first pitch, and (2) when a second plurality of voltages are applied to at least some of the plurality of electrodes, the plurality of liquid crystals are oriented such that the planar liquid-crystal structure operates as a diffraction grating having a second pitch different from the first pitch.Type: GrantFiled: July 28, 2020Date of Patent: January 31, 2023Assignee: Meta Platforms Technologies, LLCInventors: Erik Shipton, Alireza Moheghi, Giuseppe Calafiore, Hee Yoon Lee
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Patent number: 11435585Abstract: An optical device having suppressed rainbow effect is provided. The optical device includes a light source configured to generate an image light, an optical combiner coupled with the light source and configured to direct the image light to an eye-box of the optical device, and a dimming element disposed at the optical combiner. The optical combiner includes at least one diffractive element. The optical combiner has a first side facing the eye-box and an opposing second side facing a real world, and the dimming element is disposed at the second side of the optical combiner. The dimming element is configured to receive a light from the real world and significantly attenuate an intensity of the light having an incidence angle in a predetermined range.Type: GrantFiled: October 29, 2019Date of Patent: September 6, 2022Assignee: META PLATFORMS TECHNOLOGIES, LLCInventors: Oleg Yaroshchuk, Barry David Silverstein, Alireza Moheghi, Gang Li
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Patent number: 11428977Abstract: A configurable occluder/dimmer for a near-eye display includes an array of polarization rotators and a polarization-selective scatterer downstream of the array of polarization rotators. The array of rotators and the polarization-selective scatterer are disposed between a pair of polarizers. The polarization-selective scatterer only scatters light at one of two orthogonal polarizations, thereby enhancing the achieved extinction ratio of the configurable occluder/dimmer. The configurable occluder/dimmer may be used in the near-eye display to provide occlusion effects rendering added virtual objects opaque, and/or to equalize contrast of the generated virtual imagery across the field of view of the display.Type: GrantFiled: April 5, 2021Date of Patent: August 30, 2022Assignee: Meta Platforms Technologies LLCInventors: Nathan Matsuda, Douglas Robert Lanman, Afsoon Jamali, Jasmine Soria Sears, Oleg Yaroshchuk, Alireza Moheghi
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Patent number: 11428938Abstract: An optical device includes a light source assembly configured to generate an image light; and at least one waveguide including an in-coupling element and an out-coupling element configured to transmit, via the at least one waveguide, a plurality of light fields of the image light to an eye-box of the optical device, in a time-multiplexing manner. At least one of the in-coupling element or the out-coupling element includes at least one switchable diffractive optical grating, which includes a surface relief grating (SRG) filled with an optically anisotropic material having a first principal refractive index along a groove direction of the SRG and a second principal refractive index along an in-plane direction perpendicular to the groove direction. One of the first and second refractive principal refractive indices substantially matches a refractive index of the SRG, and the other mismatches.Type: GrantFiled: December 23, 2019Date of Patent: August 30, 2022Assignee: META PLATFORMS TECHNOLOGIES, LLCInventors: Oleg Yaroshchuk, Giuseppe Calafiore, Alireza Moheghi, Andrew Maimone, Barry David Silverstein
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Publication number: 20220091323Abstract: A device includes a waveguide, an in-coupling element, and an out-coupling element coupled with the waveguide. The waveguide, the in-coupling element, and the out-coupling element are configured to deliver a plurality of portions of an image light to an eye-box of the device. At least one of the in-coupling element or the out-coupling element includes a polarization selective diffractive element. The polarization selective diffractive element includes a grating including a plurality of microstructures defining a plurality of grooves filled with a passive optically anisotropic material having a first effective refractive index along a groove direction of the grooves and a second effective refractive index along an in-plane direction perpendicular to the groove direction. One of the first effective refractive index or the second effective refractive index substantially matches with a refractive index of the microstructures.Type: ApplicationFiled: September 23, 2020Publication date: March 24, 2022Inventors: Oleg YAROSHCHUK, Giuseppe CALAFIORE, Alireza MOHEGHI, Andrew MAIMONE, Barry David SILVERSTEIN
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Publication number: 20220026721Abstract: A near eye display (NED) includes an electronic display configured to output image light. Further, the NED includes an eye tracking module and multiple optical elements that are combined to form an optical system to allow for changes in position of one or both eyes of a user of the NED. Various types of such optical elements, which may have optical states that are switchable, may be used to steer a light beam toward the user's eye. A direction of the steering may be based on eye tracking information measured by the eye tracking module.Type: ApplicationFiled: October 6, 2021Publication date: January 27, 2022Inventors: Afsoon JAMALI, Lu LU, Andrew MAIMONE, Alireza MOHEGHI, Wai Sze Tiffany LAM, Scott Charles MCELDOWNEY, Douglas Robert LANMAN
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Patent number: 11181741Abstract: A method to suppress a rainbow effect and an optical device thereof are provided. The method includes receiving, by a dimming element, a light from a real world. The method further includes attenuating, by the dimming element, an intensity of the light with a degree of attenuation growing with an incidence angle. The dimming element includes a liquid crystal (LC) dimming element.Type: GrantFiled: September 9, 2019Date of Patent: November 23, 2021Assignee: FACEBOOK TECHNOLOGIES, LLCInventors: Oleg Yaroshchuk, Barry David Silverstein, Alireza Moheghi
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Patent number: 11175507Abstract: A near eye display (NED) includes an electronic display configured to output image light. Further, the NED includes an eye tracking module and multiple optical elements that are combined to form an optical system to allow for changes in position of one or both eyes of a user of the NED. Various types of such optical elements, which may have optical states that are switchable, may be used to steer a light beam toward the user's eye. A direction of the steering may be based on eye tracking information measured by the eye tracking module.Type: GrantFiled: February 11, 2019Date of Patent: November 16, 2021Assignee: Facebook Technologies, LLCInventors: Afsoon Jamali, Lu Lu, Andrew Maimone, Alireza Moheghi, Wai Sze Tiffany Lam, Scott Charles McEldowney, Douglas Robert Lanman
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Publication number: 20210263317Abstract: An augmented reality/mixed reality/virtual reality (AR/MR/VR) display configured to output artificial reality content comprising an angularly selective diffusive combiner and a projector configured to project a virtual image on the angularly selective diffusive combiner is disclosed. The angularly selective diffusive combiner comprises first and second opposing surfaces with a first material disposed in between. The angularly selective diffusive combiner also comprises a second material disposed between the first and second opposing surfaces, the second material having an optical index of refraction substantially matching the optical index of refraction of the first material for light normally incident to the first and second surfaces at a first angle and an optical index of refraction different from the optical index of refraction of the first material for light incident to the first and second surfaces at an angle.Type: ApplicationFiled: February 25, 2020Publication date: August 26, 2021Inventors: Oleg Yaroshchuk, Alireza Moheghi, Yusufu Njoni Bamaxam Sulai
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Patent number: 11073700Abstract: A display device includes a display having optically anisotropic molecules disposed between a front surface and a back surface. The display is configurable to either receive image light and diffuse the image light to output diffused image light from the front surface, or to transmit ambient light from the back surface to the front surface. The display device also includes an optical assembly that has a substrate, a reflector, and a beam splitter. The optical assembly is configurable to transmit a portion of the diffused image light at a first optical power via an optical path including reflections at the reflector and at the beam splitter and to transmit a portion of the ambient light output from the front surface of the display at a second optical power without reflection at the reflector. The second optical power is less than the first optical power.Type: GrantFiled: March 5, 2020Date of Patent: July 27, 2021Assignee: Facebook Technologies, LLCInventors: Yusufu Njoni Bamaxam Sulai, Brian Wheelwright, Weichuan Gao, Alireza Moheghi, Ying Geng, Oleg Yaroshchuk
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Publication number: 20210191122Abstract: An optical device includes a light source assembly configured to generate an image light; and at least one waveguide including an in-coupling element and an out-coupling element configured to transmit, via the at least one waveguide, a plurality of light fields of the image light to an eye-box of the optical device, in a time-multiplexing manner. At least one of the in-coupling element or the out-coupling element includes at least one switchable diffractive optical grating, which includes a surface relief grating (SRG) filled with an optically anisotropic material having a first principal refractive index along a groove direction of the SRG and a second principal refractive index along an in-plane direction perpendicular to the groove direction. One of the first and second refractive principal refractive indices substantially matches a refractive index of the SRG, and the other mismatches.Type: ApplicationFiled: December 23, 2019Publication date: June 24, 2021Inventors: Oleg YAROSHCHUK, Giuseppe CALAFIORE, Alireza MOHEGHI, Andrew MAIMONE, Barry David SILVERSTEIN
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Patent number: 11009737Abstract: A configurable occluder/dimmer for a near-eye display includes an array of polarization rotators and a polarization-selective scatterer downstream of the array of polarization rotators. The array of rotators and the polarization-selective scatterer are disposed between a pair of polarizers. The polarization-selective scatterer only scatters light at one of two orthogonal polarizations, thereby enhancing the achieved extinction ratio of the configurable occluder/dimmer. The configurable occluder/dimmer may be used in the near-eye display to provide occlusion effects rendering added virtual objects opaque, and/or to equalize contrast of the generated virtual imagery across the field of view of the display.Type: GrantFiled: September 17, 2019Date of Patent: May 18, 2021Assignee: FACEBOOK TECHNOLOGIES, LLCInventors: Nathan Matsuda, Douglas Robert Lanman, Afsoon Jamali, Jasmine Soria Sears, Oleg Yaroshchuk, Alireza Moheghi
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Patent number: 10989926Abstract: A near-eye display based on a polarization-selective diffusive combiner includes a polarizer for polarizing impinging ambient light to have a first polarization state, and a polarization-selective scatterer downstream of the polarizer, for passing through the ambient light having the first polarization state substantially without scattering, while scattering impinging display light having a second polarization state orthogonal to the first polarization state. The display light at the second polarization state may be provided by a projector, the polarization-selective scatterer playing the role of a projector screen. A polarization-selective ocular lens may be disposed downstream of the polarization-selective scatterer for viewing images generated by the projector while propagating through orthogonally polarized light from outside environment.Type: GrantFiled: September 23, 2019Date of Patent: April 27, 2021Assignee: FACEBOOK TECHNOLOGIES, LLCInventors: Nathan Matsuda, Yusufu Njoni Bamaxam Sulai, Ying Geng, Brian Wheelwright, Douglas Robert Lanman, Afsoon Jamali, Jasmine Soria Sears, Alireza Moheghi
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Publication number: 20210080763Abstract: A display device includes a display having optically anisotropic molecules disposed between a front surface and a back surface. The display is configurable to either receive image light and diffuse the image light to output diffused image light from the front surface, or to transmit ambient light from the back surface to the front surface. The display device also includes an optical assembly that has a substrate, a reflector, and a beam splitter. The optical assembly is configurable to transmit a portion of the diffused image light at a first optical power via an optical path including reflections at the reflector and at the beam splitter and to transmit a portion of the ambient light output from the front surface of the display at a second optical power without reflection at the reflector. The second optical power is less than the first optical power.Type: ApplicationFiled: March 5, 2020Publication date: March 18, 2021Inventors: Yusufu Njoni Bamaxam SULAI, Brian WHEELWRIGHT, Weichuan GAO, Alireza MOHEGHI, Ying GENG, Oleg YAROSHCHUK
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Patent number: 10867451Abstract: An example device may include an electronic display configured to generate an augmented reality image element and an optical combiner configured to receive the augmented reality image element along with ambient light from outside the device. The optical combiner may be configured to provide an augmented reality image having the augmented reality image element located within a portion of an ambient image formed from the ambient light. The device may also include a dimmer element configured to selectively dim the portion of the ambient image in which the augmented reality image element is located.Type: GrantFiled: July 3, 2019Date of Patent: December 15, 2020Assignee: Facebook Technologies, LLCInventors: Jasmine Soria Sears, Alireza Moheghi, Oleg Yaroshchuk, Douglas Robert Lanman, Andrew Maimone, Kavitha Ratnam, Nathan Matsuda
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Patent number: 10839609Abstract: An example device may include an electronic display configured to generate an augmented reality image element and an optical combiner configured to receive the augmented reality image element along with ambient light from outside the device. The optical combiner may be configured to provide an augmented reality image having the augmented reality image element located within a portion of an ambient image formed from the ambient light. The device may also include a dimmer element configured to selectively dim the portion of the ambient image in which the augmented reality image element is located.Type: GrantFiled: July 3, 2019Date of Patent: November 17, 2020Assignee: Facebook Technologies, LLCInventors: Jasmine Soria Sears, Alireza Moheghi, Oleg Yaroshchuk, Douglas Robert Lanman, Andrew Maimone, Kavitha Ratnam, Nathan Matsuda, Lu Lu, Nicholas Diorio, Mengfei Wang
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Patent number: 10750145Abstract: An apparatus may include a projector that switches from emitting monochromatic light of a first color to emitting monochromatic light of a second color that is different from the first color. The apparatus may also include one or more variable-pitch diffraction gratings that diffract monochromatic light emitted from the projector. The apparatus may further include a controller that changes a pitch of at least one of the one or more variable-pitch diffraction gratings from a first pitch used when the projector is emitting monochromatic light of the first color to a second pitch used when the projector is emitting monochromatic light of the second color.Type: GrantFiled: May 24, 2018Date of Patent: August 18, 2020Assignee: Facebook Technologies, LLCInventors: Erik Shipton, Alireza Moheghi, Giuseppe Calafiore, Hee Yoon Lee
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Publication number: 20200111258Abstract: An example device may include an electronic display configured to generate an augmented reality image element and an optical combiner configured to receive the augmented reality image element along with ambient light from outside the device. The optical combiner may be configured to provide an augmented reality image having the augmented reality image element located within a portion of an ambient image formed from the ambient light. The device may also include a dimmer element configured to selectively dim the portion of the ambient image in which the augmented reality image element is located.Type: ApplicationFiled: July 3, 2019Publication date: April 9, 2020Inventors: Jasmine Soria Sears, Alireza Moheghi, Oleg Yaroshchuk, Douglas Robert Lanman, Andrew Maimone, Kavitha Ratnam, Nathan Matsuda