公开(公告)号：US20230228934A1

公开(公告)日：2023-07-20

申请号：US18185032

申请日：2023-03-16

Applicant: Magic Leap, Inc.

Inventor： Sharad D. Bhagat ,  Brian George Hill ,  Christophe Peroz ,  Chieh Chang ,  Ling Li

IPC: G02B27/01 ,  F21V8/00

CPC classification number: G02B27/0172 ,  G02B6/0065 ,  G02B6/0076 ,  G02B6/0038 ,  G02B2027/0112

Abstract: A diffractive waveguide stack includes first, second, and third diffractive waveguides for guiding light in first, second, and third visible wavelength ranges, respectively. The first diffractive waveguide includes a first material having first refractive index at a selected wavelength and a first target refractive index at a midpoint of the first visible wavelength range. The second diffractive waveguide includes a second material having a second refractive index at the selected wavelength and a second target refractive index at a midpoint of the second visible wavelength range. The third diffractive waveguide includes a third material having a third refractive index at the selected wavelength and a third target refractive index at a midpoint of the third visible wavelength range. A difference between any two of the first target refractive index, the second target refractive index, and the third target refractive index is less than 0.005 at the selected wavelength.

公开(公告)号：US20210405372A1

公开(公告)日：2021-12-30

申请号：US17359195

申请日：2021-06-25

Applicant: Magic Leap, Inc.

Inventor： Chieh Chang ,  Christophe Peroz ,  Ryan Jason Ong ,  Ling Li ,  Sharad D. Bhagat ,  Samarth Bhargava

IPC: G02B27/01 ,  G02B27/00 ,  G02B6/02

Abstract: 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.

公开(公告)号：US20240377644A1

公开(公告)日：2024-11-14

申请号：US18779810

申请日：2024-07-22

Applicant: Magic Leap, Inc.

Inventor： Chieh Chang ,  Christophe Peroz ,  Ryan Jason Ong ,  Ling Li ,  Sharad D. Bhagat ,  Samarth Bhargava

IPC: G02B27/01 ,  G02B5/18 ,  G02B6/02 ,  G02B27/00

Abstract: 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.

公开(公告)号：US20240302652A1

公开(公告)日：2024-09-12

申请号：US18654811

申请日：2024-05-03

Applicant: MAGIC LEAP, INC.

Inventor： Sharad D. Bhagat ,  David Carl Jurbergs ,  Ryan Jason Ong ,  Christophe Peroz ,  Chieh Chang ,  Ling Li

IPC: G02B27/00 ,  B29D11/00 ,  G02B5/22

CPC classification number: G02B27/0025 ,  B29D11/00663 ,  G02B5/22 ,  G02B6/0026 ,  G02B6/0065 ,  G02B27/0081 ,  B29K2995/002

Abstract: Color-selective waveguides, methods for fabricating color-selective waveguides, and augmented reality (AR)/mixed reality (MR) applications including color-selective waveguides are described. The color-selective waveguides can advantageously reduce or block stray light entering a waveguide (e.g., red, green, or blue waveguide), thereby reducing or eliminating back-reflection or back-scattering into the eyepiece.

公开(公告)号：US20240173930A1

公开(公告)日：2024-05-30

申请号：US18388660

申请日：2023-11-10

Applicant: Magic Leap, Inc.

Inventor： Mauro MELLI ,  Chieh Chang ,  Ling Li ,  Melanie Maputol WEST ,  Christophe Peroz ,  Ali KARBASI ,  Sharad D. Bhagat ,  Brian George HILL

IPC: B29D11/00 ,  B29C33/42 ,  G02B6/12 ,  G02B6/136

CPC classification number: B29D11/00682 ,  B29C33/424 ,  G02B6/136 ,  G02B2006/12107 ,  G02B2006/12173 ,  G02B2006/12176

Abstract: Methods are disclosed for fabricating molds for forming eyepieces having waveguides with integrated spacers. The molds are formed by etching deep holes (e.g., 5 μm to 1000 μm deep) into a substrate using a wet etch or dry etch. The etch masks for defining the holes may be formed with a thick metal layer and/or multiple layers of different metals. A resist layer may be disposed over the etch mask. The resist layer may be patterned to form a pattern of holes, the pattern may be transferred to the etch mask, and the etch mask may be used to transfer the pattern into the underlying substrate. The patterned substrate may be utilized as a mold onto which a flowable polymer may be introduced and allowed to harden. Hardened polymer in the holes may form integrated spacers. The hardened polymer may be removed from the mold to form a waveguide with integrated spacers.

公开(公告)号：US20240159956A1

公开(公告)日：2024-05-16

申请号：US18394211

申请日：2023-12-22

Applicant: Magic Leap, Inc.

Inventor： Christophe Peroz ,  Chieh Chang ,  Sharad D. Bhagat ,  Victor Kai Liu ,  Roy Matthew Patterson ,  David Carl Jurbergs ,  Mohammadreza Khorasaninejad ,  Ling Li ,  Michael Nevin Miller ,  Charles Scott Carden

IPC: F21V8/00 ,  B29D11/00 ,  G02B27/42

CPC classification number: G02B6/0088 ,  B29D11/00673 ,  G02B6/0016 ,  G02B6/0036 ,  G02B6/0076 ,  G02B27/4277 ,  G02B5/003

Abstract: In some embodiments, a head-mounted, near-eye display system comprises a stack of waveguides having integral spacers separating the waveguides. The waveguides may each include diffractive optical elements that are formed simultaneously with the spacers by imprinting. The spacers are disposed on one major surface of each of the waveguides and indentations are provided on an opposite major surface of each of the waveguides. The indentations are sized and positioned to align with the spacers, thereby forming a self-aligned stack of waveguides. Tops of the spacers may be provided with light scattering features, anti-reflective coatings, and/or light absorbing adhesive to prevent light leakage between the waveguides. As seen in a top-down view, the spacers may be elongated along the same axis as the diffractive optical elements. The waveguides may include structures (e.g., layers of light absorbing materials, rough surfaces, light out-coupling optical elements, and/or light trapping microstructures) along their edges to mitigate reflections and improve the display contrast.

公开(公告)号：US11840034B2

公开(公告)日：2023-12-12

申请号：US17186902

申请日：2021-02-26

Applicant: Magic Leap, Inc.

Inventor： Mauro Melli ,  Chieh Chang ,  Ling Li ,  Melanie Maputol West ,  Christophe Peroz ,  Ali Karbasi ,  Sharad D. Bhagat ,  Brian George Hill

IPC: B29D11/00 ,  B29C33/42 ,  G02B6/136 ,  G02B6/12

CPC classification number: B29D11/00682 ,  B29C33/424 ,  G02B6/136 ,  G02B2006/12107 ,  G02B2006/12173 ,  G02B2006/12176

Abstract: Methods are disclosed for fabricating molds for forming eyepieces having waveguides with integrated spacers. The molds are formed by etching deep holes (e.g., 5 μm to 1000 μm deep) into a substrate using a wet etch or dry etch. The etch masks for defining the holes may be formed with a thick metal layer and/or multiple layers of different metals. A resist layer may be disposed over the etch mask. The resist layer may be patterned to form a pattern of holes, the pattern may be transferred to the etch mask, and the etch mask may be used to transfer the pattern into the underlying substrate. The patterned substrate may be utilized as a mold onto which a flowable polymer may be introduced and allowed to harden. Hardened polymer in the holes may form integrated spacers. The hardened polymer may be removed from the mold to form a waveguide with integrated spacers.

公开(公告)号：US11726317B2

公开(公告)日：2023-08-15

申请号：US16909922

申请日：2020-06-23

Applicant: Magic Leap, Inc.

Inventor： Ling Li ,  Ali Karbasi ,  Christophe Peroz ,  Chieh Chang ,  Sharad D. Bhagat ,  Brian George Hill ,  Melanie Maputol West ,  Ryan Jason Ong ,  Xiaopei Deng ,  Shuqiang Yang ,  Frank Y. Xu

IPC: G02B27/00 ,  G02B27/01

CPC classification number: G02B27/0006 ,  G02B27/0172 ,  G02B27/0176 ,  G02B2027/0161 ,  G02B2027/0169

Abstract: A head-mounted, near-eye display system comprises a stack of waveguides having integral spacers separating the waveguides. The waveguides may each include diffractive optical elements that are formed simultaneously with the spacers by imprinting or casting. The spacers are disposed on one or more major surfaces of the waveguides and define a distance between immediately adjacent waveguides. Adjacent waveguides may be bonded using adhesives on the spacers. The spacers may fit within indentations of overlying waveguides. In some cases, the spacers may form one or more walls of material substantially around a perimeter of an associated waveguide. Vent holes may be provided in the walls to allow gas flow into and out from an interior volume defined by the spacers. Debris trapping structures may be provided between two walls of spacers to trap and prevent debris from entering into the interior volume.

公开(公告)号：US11630256B2

公开(公告)日：2023-04-18

申请号：US17409163

申请日：2021-08-23

Applicant: Magic Leap, Inc.

Inventor： Sharad D. Bhagat ,  Brian George Hill ,  Christophe Peroz ,  Chieh Chang ,  Ling Li

IPC: G02B27/01 ,  F21V8/00

Abstract: A diffractive waveguide stack includes first, second, and third diffractive waveguides for guiding light in first, second, and third visible wavelength ranges, respectively. The first diffractive waveguide includes a first material having first refractive index at a selected wavelength and a first target refractive index at a midpoint of the first visible wavelength range. The second diffractive waveguide includes a second material having a second refractive index at the selected wavelength and a second target refractive index at a midpoint of the second visible wavelength range. The third diffractive waveguide includes a third material having a third refractive index at the selected wavelength and a third target refractive index at a midpoint of the third visible wavelength range. A difference between any two of the first target refractive index, the second target refractive index, and the third target refractive index is less than 0.005 at the selected wavelength.

公开(公告)号：US20220229290A1

公开(公告)日：2022-07-21

申请号：US17715730

申请日：2022-04-07

Applicant: Magic Leap, Inc.

Inventor： Sharad D. Bhagat ,  David Carl Jurbergs ,  Ryan Jason Ong ,  Christophe Peroz ,  Chieh Chang ,  Ling Li

IPC: G02B27/00 ,  G02B5/22 ,  F21V8/00 ,  B29D11/00

Abstract: Color-selective waveguides, methods for fabricating color-selective waveguides, and augmented reality (AR)/mixed reality (MR) applications including color-selective waveguides are described. The color-selective waveguides can advantageously reduce or block stray light entering a waveguide (e.g., red, green, or blue waveguide), thereby reducing or eliminating back-reflection or back-scattering into the eyepiece.