Patents by Inventor Sumanta Talukdar
Sumanta Talukdar 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: 20230251411Abstract: An optical device for controlling light in an augmented reality display is provided. The optical device includes a waveguide and a diffractive optical element to couple light into the waveguide. The diffractive optical element includes an array of structured grating elements. The structured grating elements are arranged based on a repeating unit cell, each unit cell including at least two grating elements defining an irregular grating structure such that the diffractive optical element produces an asymmetrical diffraction response. Methods of manufacturing the optical device are also provided.Type: ApplicationFiled: June 29, 2021Publication date: August 10, 2023Inventors: Gleb Siroki, Sebastien De Cunsel, Sumanta Talukdar, Cheng Shi, Tom Vidar Michalsen, David Poussin, Mohmed Salim Valera
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Patent number: 10634925Abstract: A display system is disclosed for use in an augmented reality display (30), the system comprises a waveguide (32) having a front surface and a rear surface. A front input projector (34) projects polychromatic light through a front surface, and a back input projector (36) projects polychromatic light through the rear surface. Input light impinges on an input grating (38) on a rear surface of the waveguide (32), and light travels through the waveguide by total internal reflection. An output grating (40) is provided for coupling light out of the waveguide. A plurality of front and back input projectors (34, 36) are provided in a staggered configuration along the width of the waveguide (32) and respective edges of adjacent front and back input projectors are aligned along the width of the waveguide to permit a continuous projection of light.Type: GrantFiled: December 22, 2015Date of Patent: April 28, 2020Assignee: Wave Optics Ltd.Inventors: David Grey, Sumanta Talukdar
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Patent number: 10359635Abstract: An optical device is disclosed for expanding input light in two dimensions in an augmented reality display. The device comprises a waveguide (12) and three linear diffraction grat-ings H0, H1, H2. An incident beam from a projector illuminates an input grating H0 with polychromatic light, and the light is coupled into the waveguide (12). The other two gratings H1, H2 are overlaid on top of one another. Light can be diffracted by one grating H1 into a first diffracted order and towards the other grating H2 which can couple the light out of the waveguide (12) towards a viewer. In another arrangement the crossed gratings H1, H2 may be replaced by a photonic crystal (19) having a regular array of pillars (20) which create a number effective diffraction gratings.Type: GrantFiled: August 14, 2018Date of Patent: July 23, 2019Assignee: Wave Optics Ltd.Inventors: David Grey, Sumanta Talukdar
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Publication number: 20190004321Abstract: An optical device is disclosed for expanding input light in two dimensions in an augmented reality display. The device comprises a waveguide (12) and three linear diffraction grat-ings H0, H1, H2. An incident beam from a projector illuminates an input grating H0 with polychromatic light, and the light is coupled into the waveguide (12). The other two gratings H1, H2 are overlaid on top of one another. Light can be diffracted by one grating H1 into a first diffracted order and towards the other grating H2 which can couple the light out of the waveguide (12) towards a viewer. In another arrangement the crossed gratings H1, H2 may be replaced by a photonic crystal (19) having a regular array of pillars (20) which create a number effective diffraction gratings.Type: ApplicationFiled: August 14, 2018Publication date: January 3, 2019Inventors: David Grey, Sumanta Talukdar
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Patent number: 10114220Abstract: An optical device is disclosed for expanding input light in two dimensions in an augmented reality display. The device comprises a waveguide (12) and three linear diffraction gratings H0, H1, H2. An incident beam from a projector illuminates an input grating H0 with polychromatic light, and the light is coupled into the waveguide (12). The other two gratings H1, H2 are overlaid on top of one another. Light can be diffracted by one grating H1 into a first diffracted order and towards the other grating H2 which can couple the light out of the waveguide (12) towards a viewer. In another arrangement the crossed gratings H1, H2 may be replaced by a photonic crystal (19) having a regular array of pillars (20) which create a number effective diffraction gratings.Type: GrantFiled: July 28, 2015Date of Patent: October 30, 2018Assignee: WAVE OPTICS LTDInventors: David Grey, Sumanta Talukdar
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Publication number: 20180210205Abstract: An optical device is disclosed for expanding input light in two dimensions in an augmented reality display. The device comprises a waveguide (12) and three linear diffraction gratings H0, H1, H2. An incident beam from a projector illuminates an input grating H0 with polychromatic light, and the light is coupled into the waveguide (12). The other two gratings H1, H2 are overlaid on top of one another. Light can be diffracted by one grating H1 into a first diffracted order and towards the other grating H2 which can couple the light out of the waveguide (12) towards a viewer. In another arrangement the crossed gratings H1, H2 may be replaced by a photonic crystal (19) having a regular array of pillars (20) which create a number effective diffraction gratings.Type: ApplicationFiled: July 28, 2015Publication date: July 26, 2018Inventors: David Grey, Sumanta Talukdar
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Publication number: 20180003994Abstract: A display system is disclosed for use in an augmented reality display (30), the system comprises a waveguide (32) having a front surface and a rear surface. A front input projector (34) projects polychromatic light through a front surface, and a back input projector (36) projects polychro matic light through the rear surface. Input light impinges on an input grating (38) on a rear surface of the waveguide (32), and light travels through the waveguide by total internal reflection. An output grating (40) is provided for coupling light out of the waveguide. A plurality of front and back input projectors (34, 36) are provided in a staggered configuration along the width of the waveguide (32) and respective edges of adjacent front and back input projectors are aligned along the width of the waveguide to permit a continuous projection of light.Type: ApplicationFiled: December 22, 2015Publication date: January 4, 2018Applicant: Wave Optics Ltd.Inventors: David GREY, Sumanta TALUKDAR
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Patent number: 8558853Abstract: A single view display of reduced power consumption is provided. The display comprises a display device for displaying the single view and an optical system for concentrating light modulated by the single view into a reduced angular range. A viewer direction determining system determines the direction of a viewer relative to the display and controls the display device and the optical system so that the angular range includes the direction of the viewer.Type: GrantFiled: February 19, 2009Date of Patent: October 15, 2013Assignee: Sharp Kabushiki KaishaInventors: Michel Sagardoyburu, Allan Evans, Alistair Paul Curd, Sumanta Talukdar, Harry Garth Walton, Nathan James Smith
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Publication number: 20100238367Abstract: A light output arrangement is provided and may be used as a backlight for a display. The arrangement comprises a bendable light-outputting layer (51), for example, comprising a light-guide, and a bendable light-directing layer (50), for example, comprising a lens array. The layers (50, 51) are fixed together so as to prevent relative lateral movement at the mid-points but otherwise are constrained to bend in conformance with each other. The light-directing layer comprises a plurality of structures, such as lenses (81), which cooperate with, for example, light extraction features (80) in the light guide (51) so as to direct light output from the light-directing layer (50) in substantially the same direction (82, 83) irrespective of bending of the layers (50, 51).Type: ApplicationFiled: September 5, 2008Publication date: September 23, 2010Inventors: David James Montgomery, Sumanta Talukdar
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Publication number: 20090213147Abstract: A single view display of reduced power consumption is provided. The display comprises a display device for displaying the single view and an optical system for concentrating light modulated by the single view into a reduced angular range. A viewer direction determining system determines the direction of a viewer relative to the display and controls the display device and the optical system so that the angular range includes the direction of the viewer.Type: ApplicationFiled: February 19, 2009Publication date: August 27, 2009Applicant: SHARP KABUSHIKI KAISHAInventors: Michel Sagardoyburu, Allan Evans, Alistair Paul Curd, Sumanta Talukdar, Harry Garth Walton, Nathan James Smith