Patents by Inventor Samarth Bhargava
Samarth Bhargava 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: 20240126166Abstract: Embodiments of the present disclosure generally relate to methods of forming a substrate having a target thickness distribution at one or more eyepiece areas across a substrate. The substrate includes eyepiece areas corresponding to areas where optical device eyepieces are to be formed on the substrate. Each eyepiece area includes a target thickness distribution. A base substrate thickness distribution of a base substrate is measured such that a target thickness change can be determined. The methods described herein are utilized along with the target thickness change to form a substrate with the target thickness distribution.Type: ApplicationFiled: December 28, 2023Publication date: April 18, 2024Inventors: David Alexander SELL, Samarth BHARGAVA
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Publication number: 20240126012Abstract: Embodiments of the present disclosure generally relate to methods for forming a waveguide. Methods may include measuring a waveguide substrate, the waveguide having a substrate thickness distribution; and depositing an index-matched layer onto a surface of the waveguide, the index-matched layer having a first surface disposed on the waveguide substrate and a second surface opposing the first surface, wherein the index-matched layer is disposed only over a portion of the waveguide substrate, and a device slope of a second surface of the index-matched layer is substantially the same as the waveguide slope of the first surface of the waveguide.Type: ApplicationFiled: October 18, 2023Publication date: April 18, 2024Inventors: Yingdong LUO, Zhengping YAO, Daihua ZHANG, David Alexander SELL, Jingyi YANG, Xiaopei DENG, Kevin MESSER, Samarth BHARGAVA, Rami HOURANI, Ludovic GODET
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Patent number: 11947121Abstract: An example waveguide can include a polymer layer having substantially optically transparent material with first and second major surfaces configured such that light containing image information can propagate through the polymer layer being guided therein by reflecting from the first and second major surfaces via total internal reflection. The first surface can include first smaller and second larger surface portions monolithically integrated with the polymer layer and with each other. The first smaller surface portion can include at least a part of an in-coupling optical element configured to couple light incident on the in-coupling optical element into the polymer layer for propagation therethrough by reflection from the second major surface and the second larger surface portion of the first major surface.Type: GrantFiled: October 27, 2022Date of Patent: April 2, 2024Assignee: Magic Leap, Inc.Inventors: Christophe Peroz, Victor Kai Liu, Samarth Bhargava
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Publication number: 20240077676Abstract: A plurality of waveguide display substrates, each waveguide display substrate having a cylindrical portion having a diameter and a planar surface, a curved portion opposite the planar surface defining a nonlinear change in thickness across the substrate and having a maximum height D with respect to the cylindrical portion, and a wedge portion between the cylindrical portion and the curved portion defining a linear change in thickness across the substrate and having a maximum height W with respect to the cylindrical portion. A target maximum height Dt of the curved portion is 10?7 to 10?6 times the diameter, D is between about 70% and about 130% of Dt, and W is less than about 30% of Dt.Type: ApplicationFiled: November 9, 2023Publication date: March 7, 2024Inventors: Samarth Bhargava, Christophe Peroz, Victor Kai Liu
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Publication number: 20240045209Abstract: A method, includes providing a wafer including a first surface grating extending over a first area of a surface of the wafer and a second surface grating extending over a second area of the surface of the wafer; de-functionalizing a portion of the surface grating in at least one of the first surface grating area and the second surface grating area; and singulating an eyepiece from the wafer, the eyepiece including a portion of the first surface grating area and a portion of the second surface grating area. The first surface grating in the eyepiece corresponds to an input coupling grating for a head-mounted display and the second surface grating corresponds to a pupil expander grating for the head-mounted display.Type: ApplicationFiled: August 28, 2023Publication date: February 8, 2024Inventors: Chieh Chang, Christophe Peroz, Ryan Jason Ong, Ling Li, Sharad D. Bhagat, Samarth Bhargava
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Publication number: 20240036332Abstract: This disclosure describes a wearable display system configured to project light to the eye(s) of a user to display virtual (e.g., augmented reality) image content in a vision field of the user. The system can include light source(s) that output light, spatial light modulator(s) that modulate the light to provide the virtual image content, and an eyepiece configured to convey the modulated light toward the eye(s) of the user. The eyepiece can include waveguide(s) and a plurality of in-coupling optical elements arranged on or in the waveguide(s) to in-couple the modulated light received from the spatial light modulator(s) into the waveguide(s) to be guided toward the user's eye(s). The spatial light modulator(s) may be movable, and/or may include movable components, to direct different portions of the modulated light toward different ones of the in-coupling optical elements at different times.Type: ApplicationFiled: October 10, 2023Publication date: February 1, 2024Inventors: Bradley Jay SISSOM, Kevin Richard CURTIS, Hui-Chuan CHENG, Miller Harry SCHUCK, III, Samarth BHARGAVA
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Patent number: 11886111Abstract: Embodiments of the present disclosure generally relate to methods of forming a substrate having a target thickness distribution at one or more eyepiece areas across a substrate. The substrate includes eyepiece areas corresponding to areas where optical device eyepieces are to be formed on the substrate. Each eyepiece area includes a target thickness distribution. A base substrate thickness distribution of a base substrate is measured such that a target thickness change can be determined. The methods described herein are utilized along with the target thickness change to form a substrate with the target thickness distribution.Type: GrantFiled: March 21, 2022Date of Patent: January 30, 2024Assignee: Applied Materials, Inc.Inventors: David Sell, Samarth Bhargava
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Publication number: 20240027767Abstract: An eyepiece waveguide for an augmented reality display system. The eyepiece waveguide can include an input coupling grating (ICG) region. The ICG region can couple an input beam into the substrate of the eyepiece waveguide as a guided beam. A first combined pupil expander-extractor (CPE) grating region can be formed on or in a surface of the substrate. The first CPE grating region can receive the guided beam, create a first plurality of diffracted beams at a plurality of distributed locations, and out-couple a first plurality of output beams. The eyepiece waveguide can also include a second CPE grating region formed on or in the opposite surface of the substrate. The second CPE grating region can receive the guided beam, create a second plurality of diffracted beams at a plurality of distributed locations, and out-couple a second plurality of output beams.Type: ApplicationFiled: June 22, 2023Publication date: January 25, 2024Inventors: Samarth Bhargava, Victor Kai Liu, Kevin Messer
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Patent number: 11860416Abstract: A plurality of waveguide display substrates, each waveguide display substrate having a cylindrical portion having a diameter and a planar surface, a curved portion opposite the planar surface defining a nonlinear change in thickness across the substrate and having a maximum height D with respect to the cylindrical portion, and a wedge portion between the cylindrical portion and the curved portion defining a linear change in thickness across the substrate and having a maximum height W with respect to the cylindrical portion. A target maximum height Dt of the curved portion is 10?7 to 10?6 times the diameter, D is between about 70% and about 130% of Dt, and W is less than about 30% of Dt.Type: GrantFiled: October 7, 2022Date of Patent: January 2, 2024Assignee: Magic Leap, Inc.Inventors: Samarth Bhargava, Christophe Peroz, Victor Kai Liu
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Publication number: 20230417986Abstract: An eyepiece for an augmented reality display system. The eyepiece can include a waveguide substrate. The waveguide substrate can include an input coupler grating (ICG), an orthogonal pupil expander (OPE) grating, a spreader grating, and an exit pupil expander (EPE) grating. The ICG can couple at least one input light beam into at least a first guided light beam that propagates inside the waveguide substrate. The OPE grating can divide the first guided light beam into a plurality of parallel, spaced-apart light beams. The spreader grating can receive the light beams from the OPE grating and spread their distribution. The spreader grating can include diffractive features oriented at approximately 90° to diffractive features of the OPE grating. The EPE grating can re-direct the light beams from the first OPE grating and the first spreader grating such that they exit the waveguide substrate.Type: ApplicationFiled: July 7, 2023Publication date: December 28, 2023Inventors: Michael Anthony Klug, Robert Dale Tekolste, William Hudson Welch, Eric Browy, Victor Kai Liu, Samarth Bhargava
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Publication number: 20230393401Abstract: A method of operating an eyepiece waveguide includes directing light from a projector to impinge on an incoupling grating (ICG). The method also includes diffracting a first fraction of the light from the projector into a first portion of the eyepiece waveguide, propagating the first fraction of the light into a second portion of the eyepiece waveguide, and diffracting the first fraction of the light out of the eyepiece waveguide. The method further includes diffracting a second fraction of the light from the projector into the second portion of the eyepiece waveguide, propagating the second fraction of the light into the first portion of the eyepiece waveguide, and diffracting the second fraction out of the eyepiece waveguide.Type: ApplicationFiled: August 16, 2023Publication date: December 7, 2023Applicant: Magic Leap, Inc.Inventors: Brian T. Schowengerdt, Mathew D. Watson, Brandon Michael-James Born, Samarth Bhargava, Victor Kai Liu
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Patent number: 11828942Abstract: A viewing optics assembly comprising a spatial light modulator is configured to rotate the spatial light modulator.Type: GrantFiled: March 12, 2019Date of Patent: November 28, 2023Assignee: Magic Leap, Inc.Inventors: Bradley Jay Sissom, Kevin Richard Curtis, Hui-Chuan Cheng, Miller Harry Schuck, III, Samarth Bhargava
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Publication number: 20230341597Abstract: An eyepiece waveguide for an augmented reality display system. The eyepiece waveguide can include an optically transmissive substrate with an input coupling grating (ICG) region. The ICG region can receive a beam of light and couple the beam into the substrate in a guided propagation mode. The eyepiece waveguide can also include a combined pupil expander-extractor (CPE) grating region that receives the beam of light from the ICG region and alters the propagation direction of the beam with a first interaction and out-couples the beam with a second interaction. The diffractive features of the CPE grating region can be arranged in rows and columns of alternating higher and lower quadrilateral surfaces or the diffractive features can comprise diamond shaped raised ridges. The eyepiece waveguide can also include one or more recycler grating regions.Type: ApplicationFiled: September 14, 2021Publication date: October 26, 2023Inventors: Victor Kai LIU, Samarth BHARGAVA, Brandon Michael-James BORN, Dianmin LIN, Pierre ST. HILAIRE, Vikramjit SINGH, Kang LUO
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Publication number: 20230341692Abstract: Display devices include waveguides with in-coupling optical elements that mitigate re-bounce of in-coupled light to improve overall in-coupling efficiency and/or uniformity. A waveguide receives light from a light source and/or projection optics and includes an in-coupling optical element that in-couples the received light to propagate by total internal reflection in a propagation direction within the waveguide. Once in-coupled into the waveguide the light may undergo re-bounce, in which the light reflects off a waveguide surface and, after the reflection, strikes the in-coupling optical element. Upon striking the in-coupling optical element, the light may be partially absorbed and/or out-coupled by the optical element, thereby effectively reducing the amount of in-coupled light propagating through the waveguide.Type: ApplicationFiled: May 18, 2023Publication date: October 26, 2023Inventors: Jeffrey Dean SCHMULEN, Neal Paul RICKS, Samarth BHARGAVA, Kevin MESSER, Victor Kai LIU, Matthew Grant DIXON, Xiaopei DENG, Marlon Edward MENEZES, Shuqiang YANG, Vikramjit SINGH, Kang LUO, Frank Y. XU
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Publication number: 20230333466Abstract: Embodiments of the present disclosure generally relate to methods of forming a substrate having a target thickness distribution at one or more eyepiece areas across a substrate. The substrate includes eyepiece areas corresponding to areas where optical device eyepieces are to be formed on the substrate. Each eyepiece area includes a target thickness distribution. A base substrate thickness distribution of a base substrate is measured such that a target thickness change can be determined. The methods described herein are utilized along with the target thickness change to form a substrate with the target thickness distribution.Type: ApplicationFiled: June 19, 2023Publication date: October 19, 2023Inventors: David Alexander SELL, Samarth BHARGAVA
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Patent number: 11783805Abstract: Techniques for ordering the output of notification summaries are described. A system may receive multiple notifications intended for a same user or group of users. In response to receiving a user input requesting output of notifications (or in response to multiple notifications expiring soon), the system may identify multiple notifications intended for the user or group of users. The system generates natural language summaries of the notifications, and orders the natural language summaries based on one or more default ordering rules, one or more user preferences, one or more notification provider preference, and/or user feedback. The system then outputs the ordered natural language summaries to the user.Type: GrantFiled: September 21, 2020Date of Patent: October 10, 2023Assignee: Amazon Technologies, Inc.Inventors: Vinaya Nadig, Samarth Bhargava, Bhaskara Kiran Kumar Kommalapati, Zheng Zheng
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Patent number: 11774765Abstract: A method of operating an eyepiece waveguide having a first region and a second region includes directing light from a first projector to impinge on a first incoupling grating (ICG) and light from a second projector to impinge on a second ICG. Light from the first projector is diffracted into a first portion and a second portion of the first region of the eyepiece waveguide and out of the eyepiece waveguide. Light from the second projector is diffracted into a first portion and a second portion of the second region of the eyepiece waveguide and out of the eyepiece waveguide.Type: GrantFiled: November 28, 2022Date of Patent: October 3, 2023Assignee: Magic Leap, Inc.Inventors: Brian T. Schowengerdt, Mathew D. Watson, Brandon Michael-James Born, Samarth Bhargava, Victor Kai Liu
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Patent number: 11754841Abstract: An eyepiece waveguide for an augmented reality display system. The eyepiece waveguide can include an input coupling grating (ICG) region. The ICG region can couple an input beam into the substrate of the eyepiece waveguide as a guided beam. A first combined pupil expander-extractor (CPE) grating region can be formed on or in a surface of the substrate. The first CPE grating region can receive the guided beam, create a first plurality of diffracted beams at a plurality of distributed locations, and out-couple a first plurality of output beams. The eyepiece waveguide can also include a second CPE grating region formed on or in the opposite surface of the substrate. The second CPE grating region can receive the guided beam, create a second plurality of diffracted beams at a plurality of distributed locations, and out-couple a second plurality of output beams.Type: GrantFiled: January 14, 2022Date of Patent: September 12, 2023Assignee: Magic Leap, Inc.Inventors: Samarth Bhargava, Victor Kai Liu, Kevin Messer
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Patent number: 11740469Abstract: A method, includes providing a wafer including a first surface grating extending over a first area of a surface of the wafer and a second surface grating extending over a second area of the surface of the wafer; de-functionalizing a portion of the surface grating in at least one of the first surface grating area and the second surface grating area; and singulating an eyepiece from the wafer, the eyepiece including a portion of the first surface grating area and a portion of the second surface grating area. The first surface grating in the eyepiece corresponds to an input coupling grating for a head-mounted display and the second surface grating corresponds to a pupil expander grating for the head-mounted display.Type: GrantFiled: June 25, 2021Date of Patent: August 29, 2023Assignee: Magic Leap, Inc.Inventors: Chieh Chang, Christophe Peroz, Ryan Jason Ong, Ling Li, Sharad D. Bhagat, Samarth Bhargava
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Patent number: 11733456Abstract: An eyepiece for an augmented reality display system. The eyepiece can include a waveguide substrate. The waveguide substrate can include an input coupler grating (ICG), an orthogonal pupil expander (OPE) grating, a spreader grating, and an exit pupil expander (EPE) grating. The ICG can couple at least one input light beam into at least a first guided light beam that propagates inside the waveguide substrate. The OPE grating can divide the first guided light beam into a plurality of parallel, spaced-apart light beams. The spreader grating can receive the light beams from the OPE grating and spread their distribution. The spreader grating can include diffractive features oriented at approximately 90° to diffractive features of the OPE grating. The EPE grating can re-direct the light beams from the first OPE grating and the first spreader grating such that they exit the waveguide substrate.Type: GrantFiled: November 23, 2021Date of Patent: August 22, 2023Assignee: Magic Leap, Inc.Inventors: Michael Anthony Klug, Robert Dale Tekolste, William Hudson Welch, Eric C. Browy, Victor Kai Liu, Samarth Bhargava