Patents by Inventor Evgeni Poliakov
Evgeni Poliakov 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: 11231544Abstract: A display system comprises a waveguide having light incoupling or light outcoupling optical elements formed of a metasurface. The metasurface is a multilevel (e.g., bi-level) structure having a first level defined by spaced apart protrusions formed of a first optically transmissive material and a second optically transmissive material between the protrusions. The metasurface also includes a second level formed by the second optically transmissive material. The protrusions on the first level may be patterned by nanoimprinting the first optically transmissive material, and the second optically transmissive material may be deposited over and between the patterned protrusions. The widths of the protrusions and the spacing between the protrusions may be selected to diffract light, and a pitch of the protrusions may be 10-600 nm.Type: GrantFiled: November 2, 2016Date of Patent: January 25, 2022Assignee: Magic Leap, Inc.Inventors: Dianmin Lin, Mauro Melli, Pierre St. Hilaire, Christophe Peroz, Evgeni Poliakov
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Publication number: 20210176440Abstract: This disclosure relates to the use of variable-pitch light-emitting devices for display applications, including for displays in augmented reality, virtual reality, and mixed reality environments. In particular, it relates to small (e.g., micron-size) light emitting devices (e.g., micro-LEDs) of variable pitch to provide the advantages, e.g., of compactness, manufacturability, color rendition, as well as computational and power savings. Systems and methods for emitting multiple lights by multiple panels where a pitch of one panel is different than pitch(es) of other panels are disclosed. Each panel may comprise a respective array of light emitters. The multiple lights may be combined by a combiner.Type: ApplicationFiled: December 4, 2020Publication date: June 10, 2021Inventors: Pierre ST. HILAIRE, Evgeni POLIAKOV, Sundeep Kumar JOLLY
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Publication number: 20200150437Abstract: An optical system comprises an optically transmissive substrate comprising a metasurface which comprises a grating comprising a plurality of unit cells. Each unit cell comprises a laterally-elongated first nanobeam having a first width; and a laterally-elongated second nanobeam spaced apart from the first nanobeam by a gap, the second nanobeam having a second width larger than the first width. A pitch of the unit cells is 10 nm to 1 ?m. The heights of the first and the second nanobeams are: 10 nm to 450 nm where a refractive index of the substrate is more than 3.3; and 10 nm to 1 ?m where the refractive index is 3.3 or less.Type: ApplicationFiled: January 2, 2020Publication date: May 14, 2020Inventors: Dianmin Lin, Mauro Melli, Pierre St. Hilaire, Christophe Peroz, Evgeni Poliakov
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Publication number: 20200142110Abstract: Metasurfaces provide compact optical elements in head-mounted display systems to, e.g., incouple light into or outcouple light out of a waveguide. The metasurfaces may be formed by a plurality of repeating unit cells, each unit cell comprising two sets or more of nanobeams elongated in crossing directions: one or more first nanobeams elongated in a first direction and a plurality of second nanobeams elongated in a second direction. As seen in a top-down view, the first direction may be along a y-axis, and the second direction may be along an x-axis. The unit cells may have a periodicity in the range of 10 nm to 1 ?m, including 10 nm to 500 nm or 300 nm to 500 nm. Advantageously, the metasurfaces provide diffraction of light with high diffraction angles and high diffraction efficiencies over a broad range of incident angles and for incident light with circular polarization.Type: ApplicationFiled: November 4, 2019Publication date: May 7, 2020Inventors: Dianmin Lin, Michael Anthony Klug, Pierre St. Hilaire, Mauro Melli, Christophe Peroz, Evgeni Poliakov
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Patent number: 10527851Abstract: An optical system comprises an optically transmissive substrate comprising a metasurface which comprises a grating comprising a plurality of unit cells. Each unit cell comprises a laterally-elongated first nanobeam having a first width; and a laterally-elongated second nanobeam spaced apart from the first nanobeam by a gap, the second nanobeam having a second width larger than the first width. A pitch of the unit cells is 10 nm to 1 ?m. The heights of the first and the second nanobeams are: 10 nm to 450 nm where a refractive index of the substrate is more than 3.3; and 10 nm to 1 ?m where the refractive index is 3.3 or less.Type: GrantFiled: May 5, 2017Date of Patent: January 7, 2020Assignee: Magic Leap, Inc.Inventors: Dianmin Lin, Mauro Melli, Pierre St. Hilaire, Christophe Peroz, Evgeni Poliakov
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Patent number: 10466394Abstract: Metasurfaces provide compact optical elements in head-mounted display systems to, e.g., incouple light into or outcouple light out of a waveguide. The metasurfaces may be formed by a plurality of repeating unit cells, each unit cell comprising two sets or more of nanobeams elongated in crossing directions: one or more first nanobeams elongated in a first direction and a plurality of second nanobeams elongated in a second direction. As seen in a top-down view, the first direction may be along a y-axis, and the second direction may be along an x-axis. The unit cells may have a periodicity in the range of 10 nm to 1 ?m, including 10 nm to 500 nm or 300 nm to 500 nm. Advantageously, the metasurfaces provide diffraction of light with high diffraction angles and high diffraction efficiencies over a broad range of incident angles and for incident light with circular polarization.Type: GrantFiled: January 25, 2018Date of Patent: November 5, 2019Assignee: Magic Leap, Inc.Inventors: Dianmin Lin, Michael Anthony Klug, Pierre St. Hilaire, Mauro Melli, Christophe Peroz, Evgeni Poliakov
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Patent number: 10444419Abstract: A device includes an input coupling grating having a first grating structure characterized by a first set of grating parameters. The input coupling grating is configured to receive light from a light source. The device also includes an expansion grating having a second grating structure characterized by a second set of grating parameters varying in at least two dimensions. The second grating structure is configured to receive light from the input coupling grating. The device further includes an output coupling grating having a third grating structure characterized by a third set of grating parameters. The output coupling grating is configured to receive light from the expansion grating and to output light to a viewer.Type: GrantFiled: August 22, 2017Date of Patent: October 15, 2019Assignee: Magic Leap, Inc.Inventors: Samarth Bhargava, Robert D. TeKolste, Victor K. Liu, Christophe Peroz, Pierre St. Hilaire, Evgeni Poliakov, Jason Schaefer, Mauro Melli, Melanie West, Kang Luo, Vikramjit Singh, Frank Y. Xu
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Patent number: 10085652Abstract: An optical sensor and a method of using the optical sensor in an optical measuring device that measures cardiovascular properties and compensates for movement artifacts by directing a sheet of light towards an artery. The optical sensor may include one or more light sources, one or more transmit light guides coupled to the one or more light sources and configured to direct light from the one or more light sources as a sheet of light towards an artery, such that the cross-sectional profile of the sheet of light may have a length transverse to a longitudinal direction of the artery that is longer than the diameter of the artery. The optical sensor may include one or more light detectors configured to receive backscattered light and generate an output based on the received backscattered light that is a reflection of the sheet of light from the artery and surrounding tissues.Type: GrantFiled: March 18, 2016Date of Patent: October 2, 2018Assignee: QUALCOMM IncorporatedInventors: David Boettcher Baek, Russell Gruhlke, Evgeni Poliakov, Khurshid Alam, Lars Lading
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Publication number: 20180231702Abstract: Metasurfaces provide compact optical elements in head-mounted display systems to, e.g., incouple light into or outcouple light out of a waveguide. The metasurfaces may be formed by a plurality of repeating unit cells, each unit cell comprising two sets or more of nanobeams elongated in crossing directions: one or more first nanobeams elongated in a first direction and a plurality of second nanobeams elongated in a second direction. As seen in a top-down view, the first direction may be along a y-axis, and the second direction may be along an x-axis. The unit cells may have a periodicity in the range of 10 nm to 1 ?m, including 10 nm to 500 nm or 300 nm to 500 nm. Advantageously, the metasurfaces provide diffraction of light with high diffraction angles and high diffraction efficiencies over a broad range of incident angles and for incident light with circular polarization.Type: ApplicationFiled: January 25, 2018Publication date: August 16, 2018Inventors: Dianmin Lin, Michael Anthony Klug, Pierre St. Hilaire, Mauro Melli, Christophe Peroz, Evgeni Poliakov
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Publication number: 20180217395Abstract: Antireflection coatings for metasurfaces are described herein. In some embodiments, the metasurface may include a substrate, a plurality of nanostructures thereon, and an antireflection coating disposed over the nanostructures. The antireflection coating may be a transparent polymer, for example a photoresist layer, and may have a refractive index lower than the refractive index of the nanostructures and higher than the refractive index of the overlying medium (e.g., air). Advantageously, the antireflection coatings may reduce or eliminate ghost images in an augmented reality display in which the metasurface is incorporated.Type: ApplicationFiled: January 24, 2018Publication date: August 2, 2018Inventors: Dianmin Lin, Michael Anthony Klug, Pierre St. Hilaire, Mauro Melli, Christophe Peroz, Evgeni Poliakov
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Publication number: 20180059304Abstract: A device includes an input coupling grating having a first grating structure characterized by a first set of grating parameters. The input coupling grating is configured to receive light from a light source. The device also includes an expansion grating having a second grating structure characterized by a second set of grating parameters varying in at least two dimensions. The second grating structure is configured to receive light from the input coupling grating. The device further includes an output coupling grating having a third grating structure characterized by a third set of grating parameters. The output coupling grating is configured to receive light from the expansion grating and to output light to a viewer.Type: ApplicationFiled: August 22, 2017Publication date: March 1, 2018Applicant: Magic Leap, Inc.Inventors: Samarth Bhargava, Robert D. TeKolste, Victor K. Liu, Christophe Peroz, Pierre St. Hilaire, Evgeni Poliakov, Jason Schaefer, Mauro Melli, Melanie West, Kang Luo, Vikramjit Singh, Frank Y. Xu
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Publication number: 20170322418Abstract: An optical system comprises an optically transmissive substrate comprising a metasurface which comprises a grating comprising a plurality of unit cells. Each unit cell comprises a laterally-elongated first nanobeam having a first width; and a laterally-elongated second nanobeam spaced apart from the first nanobeam by a gap, the second nanobeam having a second width larger than the first width. A pitch of the unit cells is 10 nm to 1 ?m. The heights of the first and the second nanobeams are: 10 nm to 450 nm where a refractive index of the substrate is more than 3.3; and 10 nm to 1 ?m where the refractive index is 3.3 or less.Type: ApplicationFiled: May 5, 2017Publication date: November 9, 2017Inventors: Dianmin Lin, Mauro Melli, Pierre St. Hilaire, Christophe Peroz, Evgeni Poliakov
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Publication number: 20170265753Abstract: An optical sensor and a method of using the optical sensor in an optical measuring device that measures cardiovascular properties and compensates for movement artifacts by directing a sheet of light towards an artery. The optical sensor may include one or more light sources, one or more transmit light guides coupled to the one or more light sources and configured to direct light from the one or more light sources as a sheet of light towards an artery, such that the cross-sectional profile of the sheet of light may have a length transverse to a longitudinal direction of the artery that is longer than the diameter of the artery. The optical sensor may include one or more light detectors configured to receive backscattered light and generate an output based on the received backscattered light that is a reflection of the sheet of light from the artery and surrounding tissues.Type: ApplicationFiled: March 18, 2016Publication date: September 21, 2017Inventors: David Boettcher Baek, Russell Gruhlke, Evgeni Poliakov, Khurshid Alam, Lars Lading
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Publication number: 20170131460Abstract: A display system comprises a waveguide having light incoupling or light outcoupling optical elements formed of a metasurface. The metasurface is a multilevel (e.g., bi-level) structure having a first level defined by spaced apart protrusions formed of a first optically transmissive material and a second optically transmissive material between the protrusions. The metasurface also includes a second level formed by the second optically transmissive material. The protrusions on the first level may be patterned by nanoimprinting the first optically transmissive material, and the second optically transmissive material may be deposited over and between the patterned protrusions. The widths of the protrusions and the spacing between the protrusions may be selected to diffract light, and a pitch of the protrusions may be 10-600 nm.Type: ApplicationFiled: November 2, 2016Publication date: May 11, 2017Inventors: Dianmin Lin, Mauro Melli, Pierre St. Hilaire, Christophe Peroz, Evgeni Poliakov
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Publication number: 20170079591Abstract: Methods, systems, computer-readable media, and apparatuses for obtaining vital measurements are presented. The vital measurements may include a blood pressure value that can be obtained by determining a pulse-transit time (PTT) as a function of a photoplethysmography (PPG) measurement and electrocardiogram (ECG) measurement. A mobile device includes an outer body sized to be portable for a user, a processor contained within the outer body, a display coupled to a light guide, and at least one first sensor coupled to the light guide. The display is configured to display an illumination pattern directing light toward blood vessels within the user. The at least one first sensor is configured to measure reflected light from the illumination pattern reflected off of the blood vessels within the user, wherein the processor is configured to obtain a first measurement indicative of changes in blood volume based at least in part on the measured reflected light.Type: ApplicationFiled: September 21, 2015Publication date: March 23, 2017Inventors: Russell GRUHLKE, Igor TCHERTKOV, Russel Allyn MARTIN, Evgeni POLIAKOV, Evgeni GOUSEV, Liang SHEN, Alok GOVIL
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Patent number: 9360596Abstract: Provided are methods of depositing polymer solutions on substrates to form various optical elements. A polymer solution may include about 0.1%-30% by weight of a specific polymer having rigid rod-like molecules. The molecules may include various cores, spacers, and sides groups to ensure their solubility, viscosity, and cross-linking ability. The deposition techniques may include slot die, spray, molding, roll coating, and so forth. Pre-deposition techniques may be used to improve wettability and adhesion of substrates. Post-deposition techniques may include ultraviolet cross-linking, specific drying techniques, evaporation of solvent, treating with salt solutions, and shaping. The disclosed polymers and deposition processes may yield optical elements with high refractive index values, such as greater than 1.6. These optical elements may be used as +A plates, ?C plates, or biaxial polymers and used as retarders in LCD active panels or as light collimators and light guides.Type: GrantFiled: April 24, 2013Date of Patent: June 7, 2016Assignee: LIGHT POLYMERS HOLDINGInventors: Irina Kasyanova, Mary Parent, Evgeni Poliakov, Valery Kuzmin
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Publication number: 20150123911Abstract: Provided are multilayered touch panel stacks and methods for forming thereof. The stacks include refractive index matching layers to minimize light losses. Specifically, the stacks may comprise a substrate, one, two, three, or four refractive index matching layers deposited on the substrate, and one or two transparent conductive layers such as indium tin oxide electrode layers. The stack may be attached to a light emitting element or be a part of an LCD or OLED displays. The refractive index matching interlayers may be based on a polymer solution having about 0.1%-30% by weight of specific rigid rod-like polymer molecules. The molecules may include various cores, spacers, and side groups to ensure their solubility, viscosity, and cross-linking ability. The refractive index matching interlayer may have a refractive index in between of about 1.60-1.80.Type: ApplicationFiled: November 6, 2013Publication date: May 7, 2015Applicant: Light Polymers HoldingInventors: Evgeni Poliakov, Samuel Miller, Evgeny Morozov
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Publication number: 20150086799Abstract: An organic polymer solution may include about 0.1%-30% by weight of a specific polymer having rigid rod-like molecules. These molecules may include various cores, spacers, and sides groups to ensure their solubility, viscosity, and cross-linking ability. The rigid rod-like molecules are selected in such a way that they form self-assembling structures in the polymer solution, which makes it a lyotropic liquid crystal. The organic polymer solution, when properly deposited on a substrate and dried to remove solvents, forms a solid optical retardation layer of positive A-type substantially transparent to electromagnetic radiation in the visible spectral range.Type: ApplicationFiled: September 20, 2013Publication date: March 26, 2015Applicant: LIGHT POLYMERS HOLDINGInventors: Irina Kasyanova, Evgeni Poliakov, Valery Kuzmin, Mary Parent
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Publication number: 20140322452Abstract: Provided are methods of depositing polymer solutions on substrates to form various optical elements. A polymer solution may include about 0.1%-0% by weight of a specific polymer having rigid rod-like molecules. The molecules may include various cores, spacers, and sides groups to ensure their solubility, viscosity, and cross-linking ability. The deposition techniques may include slot die, spray, molding, roll coating, and so forth. Pre-deposition techniques may be used to improve wettability and adhesion of substrates. Post-deposition techniques may include ultraviolet cross-linking, specific drying techniques, evaporation of solvent, treating with salt solutions, and shaping. The disclosed polymers and deposition processes may yield optical elements with high refractive index values, such as greater than 1.6. These optical elements may be used as +A plates, ?C plates, or biaxial polymers and used as retarders in LCD active panels or as light collimators and light guides.Type: ApplicationFiled: April 24, 2013Publication date: October 30, 2014Applicant: LIGHT POLYMERS HOLDINGInventors: Irina Kasyanova, Mary Parent, Evgeni Poliakov, Valery Kuzmin
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Publication number: 20140133177Abstract: Provided are multilayer stacks for backlight units in LCD panels and methods for forming thereof. The stacks include refractive index matching layers and pressure sensitive adhesives to minimize light losses. More particularly, the stacks comprise a reflector, a light guide, a course diffuser, one or more brightness enhancing films, and a fine diffuser. A refractive index matching layer is deposited onto at least one surface of the backlight components. A pressure sensitive adhesive is deposited onto the refractive index matching layers. Alternatively, the stacks comprise two or more refractive index matching layers on each surface of the backlight components and retain an air gap between the backlight components. The refractive index matching interlayers are based on a polymer solution having about 0.1%-30% by weight of specific rigid rod-like polymer molecules. The molecules may include various cores, spacers, and sides groups to ensure their solubility, viscosity, and cross-linking ability.Type: ApplicationFiled: January 21, 2014Publication date: May 15, 2014Applicant: LIGHT POLYMERS HOLDINGInventors: Samuel Miller, Marc McConnaughey, Evgeny Morozov, Evgeni Poliakov