公开(公告)号：US11067860B2

公开(公告)日：2021-07-20

申请号：US15795067

申请日：2017-10-26

Applicant: MAGIC LEAP, INC.

Inventor： Chulwoo Oh ,  Mauro Melli ,  Christophe Peroz ,  Vikramjit Singh ,  Frank Xu ,  Michael Anthony Klug

IPC: G02F1/1347

Abstract: An optical device includes a liquid crystal layer having a first plurality of liquid crystal molecules arranged in a first pattern and a second plurality of liquid crystal molecules arranged in a second pattern. The first and the second pattern are separated from each other by a distance of about 20 nm and about 100 nm along a longitudinal or a transverse axis of the liquid crystal layer. The first and the second plurality of liquid crystal molecules are configured as first and second grating structures that can redirect light of visible or infrared wavelengths.

公开(公告)号：US20210132394A1

公开(公告)日：2021-05-06

申请号：US17145181

申请日：2021-01-08

Applicant: Magic Leap, Inc.

Inventor： Roy Matthew Patterson ,  Chulwoo Oh ,  Ravi Kumar Komanduri ,  Charles Scott Carden ,  Michael Nevin Miller ,  Vikramjit Singh ,  Shuqiang Yang

IPC: G02B27/01 ,  G02F1/29 ,  F21V8/00

Abstract: A display device includes a waveguide assembly comprising a waveguide configured to outcouple light out of a major surface of the waveguide to form an image in the eyes of a user. An adaptive lens assembly has a major surface facing the output surface and a waveplate lens and a switchable waveplate assembly. The switchable waveplate assembly includes quarter-wave plates on opposing sides of a switchable liquid crystal layer, and electrodes on the quarter-wave plates in the volume between the quarter-wave plates. The electrodes can selectively establish an electric field and may serve as an alignment structure for molecules of the liquid crystal layer. Portions of the adaptive lens assembly may be manufactured by roll-to-roll processing in which a substrate roll is unwound, and alignment layers and liquid crystal layers are formed on the substrate as it moves towards a second roller, to be wound on that second roller.

公开(公告)号：US10976632B2

公开(公告)日：2021-04-13

申请号：US16673652

申请日：2019-11-04

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh

IPC: G02F1/137 ,  G02F1/29 ,  G02F1/1335 ,  G02F1/01 ,  G02B27/01 ,  G06F3/038

Abstract: Examples of diffractive devices comprise a cholesteric liquid crystal (CLC) layer comprising a plurality of chiral structures, wherein each chiral structure comprises a plurality of liquid crystal molecules that extend in a layer depth direction by at least a helical pitch and are successively rotated in a first rotation direction. Arrangements of the liquid crystal molecules of the chiral structures vary periodically in a lateral direction perpendicular to the layer depth direction to provide a diffraction grating. The diffractive devices can be configured to reflect light having a particular wavelength range and sense of circular polarization. The diffractive devices can be used in waveguides and imaging systems in augmented or virtual reality systems.

公开(公告)号：US20210041703A1

公开(公告)日：2021-02-11

申请号：US16978165

申请日：2019-03-05

Applicant: Magic Leap, Inc.

Inventor： Ravi Kumar Komanduri ,  Chulwoo Oh

IPC: G02B27/01 ,  G06T19/00

Abstract: The present disclosure relates to display systems and, more particularly, to augmented reality display systems. In one aspect, an adaptive lens assembly includes a lens stack configured to exert polarization-dependent optical power to linearly polarized light. The lens stack includes a birefringent lens and an isotropic lens contacting each other to form a conformal interface therebetween. The adaptive lens assembly is configured to be selectively switched between a plurality of states having different optical powers.

公开(公告)号：US10466561B2

公开(公告)日：2019-11-05

申请号：US15835108

申请日：2017-12-07

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh

IPC: G02F1/137 ,  G02F1/29 ,  G02F1/1335 ,  G02F1/01

Abstract: Examples of diffractive devices comprise a cholesteric liquid crystal (CLC) layer comprising a plurality of chiral structures, wherein each chiral structure comprises a plurality of liquid crystal molecules that extend in a layer depth direction by at least a helical pitch and are successively rotated in a first rotation direction. Arrangements of the liquid crystal molecules of the chiral structures vary periodically in a lateral direction perpendicular to the layer depth direction to provide a diffraction grating. The diffractive devices can be configured to reflect light having a particular wavelength range and sense of circular polarization. The diffractive devices can be used in waveguides and imaging systems in augmented or virtual reality systems.

公开(公告)号：US20190227375A1

公开(公告)日：2019-07-25

申请号：US16171290

申请日：2018-10-25

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh ,  Ravi Kumar Komanduri ,  Roy Patterson ,  Charles Scott Carden ,  Michael Nevin Miller ,  Vikramjit Singh

IPC: G02F1/1335 ,  G02B6/122 ,  G02F1/1337 ,  G02B5/18 ,  G06K9/00 ,  G06T19/00 ,  G02B27/01

Abstract: A display device comprises a waveguide configured to guide light in a lateral direction parallel to an output surface of the waveguide. The waveguide is further configured to outcouple the guided light through the output surface. The display device additionally comprises a broadband adaptive lens assembly configured to incouple and to diffract therethrough the outcoupled light from the waveguide. The broadband adaptive lens assembly comprises a first waveplate lens comprising a liquid crystal (LC) layer arranged such that the waveplate lens has birefringence (Δn) that varies in a radially outward direction from a central region of the first waveplate lens and configured to diffract the outcoupled light at a diffraction efficiency greater than 90% within a wavelength range including at least 450 nm to 630 nm. The broadband adaptive lens assembly is configured to be selectively switched between a plurality of states having different optical powers.

公开(公告)号：US20180275409A1

公开(公告)日：2018-09-27

申请号：US15925505

申请日：2018-03-19

Applicant: Magic Leap, Inc.

Inventor： Chunyu Gao ,  Chulwoo Oh ,  Michael Anthony Klug ,  Evyatar Bluzer

IPC: G02B27/01 ,  H04N13/383 ,  H04N13/332 ,  G06T19/00

CPC classification number: G02B27/0172 ,  G02B6/0076 ,  G02B27/0093 ,  G02B27/0179 ,  G02B2027/0123 ,  G02B2027/0127 ,  G02B2027/0134 ,  G02B2027/0138 ,  G02B2027/0178 ,  G02B2027/0185 ,  G02B2027/0187 ,  G06T19/006 ,  H04N13/332 ,  H04N13/344 ,  H04N13/383 ,  H04N2213/001

Abstract: Examples of eye-imaging apparatus using diffractive optical elements are provided. For example, an optical device comprises a substrate having a proximal surface and a distal surface, a first coupling optical element disposed on one of the proximal and distal surfaces of the substrate, and a second coupling optical element disposed on one of the proximal and distal surfaces of the substrate and offset from the first coupling optical element. The first coupling optical element can be configured to deflect light at an angle to totally internally reflect (TIR) the light between the proximal and distal surfaces and toward the second coupling optical element, and the second coupling optical element can be configured to deflect at an angle out of the substrate. The eye-imaging apparatus can be used in a head-mounted display such as an augmented or virtual reality display.

公开(公告)号：US20180239177A1

公开(公告)日：2018-08-23

申请号：US15902927

申请日：2018-02-22

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh

IPC: G02F1/137 ,  F21V8/00 ,  G02B27/01 ,  G02F1/133

Abstract: Example display devices include a waveguide configured to propagate visible light under total internal reflection in a direction parallel to a major surface of the waveguide. The waveguide has formed thereon an outcoupling element configured to outcouple a portion of the visible light in a direction normal to the major surface of the waveguide. The example display devices additionally include a polarization-selective notch reflector disposed on a first side of the waveguide and configured to reflect visible light having a first polarization while transmitting the portion of the visible light having a second polarization. The example display devices further include a polarization-independent notch reflector disposed on a second side of the waveguide and configured to reflect visible light having the first polarization and the second polarization, where the polarization-independent notch reflector is configured to convert a polarization of visible light reflecting therefrom.

公开(公告)号：US20180143485A1

公开(公告)日：2018-05-24

申请号：US15815449

申请日：2017-11-16

Applicant: MAGIC LEAP, INC.

Inventor： Chulwoo Oh

IPC: G02F1/1335 ,  G02B27/01

CPC classification number: G02F1/133504 ,  G02B5/1833 ,  G02B5/1847 ,  G02B5/3058 ,  G02B6/0075 ,  G02B27/0172 ,  G02B27/4205 ,  G02B27/4272 ,  G02B2027/0178 ,  G02F1/133524

Abstract: The present disclosure relates to display systems and, more particularly, to augmented reality display systems. A diffraction grating includes a plurality of different diffracting zones having a periodically repeating lateral dimension corresponding to a grating period adapted for light diffraction. The diffraction grating additionally includes a plurality of different liquid crystal layers corresponding to the different diffracting zones. The different liquid crystal layers have liquid crystal molecules that are aligned differently, such that the different diffracting zones have different optical properties associated with light diffraction.

公开(公告)号：US20240337850A1

公开(公告)日：2024-10-10

申请号：US18748804

申请日：2024-06-20

Applicant: Magic Leap, Inc.

Inventor： Chunyu Gao ,  Chulwoo Oh ,  Michael Anthony Klug ,  Evyatar Bluzer

IPC: G02B27/01 ,  G02B27/00 ,  G06T19/00 ,  H04N13/332 ,  H04N13/344 ,  H04N13/383

CPC classification number: G02B27/0172 ,  G02B27/0093 ,  G02B27/0179 ,  G06T19/006 ,  H04N13/332 ,  H04N13/344 ,  H04N13/383 ,  G02B6/0076 ,  G02B2027/0123 ,  G02B2027/0127 ,  G02B2027/0134 ,  G02B2027/0138 ,  G02B2027/0178 ,  G02B2027/0185 ,  G02B2027/0187 ,  H04N2213/001

Abstract: Examples of eye-imaging apparatus using diffractive optical elements are provided. For example, an optical device comprises a substrate having a proximal surface and a distal surface, a first coupling optical element disposed on one of the proximal and distal surfaces of the substrate, and a second coupling optical element disposed on one of the proximal and distal surfaces of the substrate and offset from the first coupling optical element. The first coupling optical element can be configured to deflect light at an angle to totally internally reflect (TIR) the light between the proximal and distal surfaces and toward the second coupling optical element, and the second coupling optical element can be configured to deflect at an angle out of the substrate. The eye-imaging apparatus can be used in a head-mounted display such as an augmented or virtual reality display.