公开(公告)号：US20210302636A1

公开(公告)日：2021-09-30

申请号：US17211457

申请日：2021-03-24

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh ,  Ravi Kumar Komanduri ,  David Kleinman ,  Vaibhav Mathur ,  David Manly

IPC: G02B5/30 ,  G02B5/08 ,  G02F1/1335 ,  G02B27/01 ,  F21V8/00

Abstract: In some implementations, an optical device includes a one-way mirror formed by a polarization selective mirror and an absorptive polarizer. The absorptive polarizer has a transmission axis aligned with the transmission axis of the reflective polarizer. The one-way mirror may be provided on the world side of a head-mounted display system. Advantageously, the one-way mirror may reflect light from the world, which provides privacy and may improve the cosmetics of the display. In some implementations, the one-way mirror may include one or more of a depolarizer and a pair of opposing waveplates to improve alignment tolerances and reduce reflections to a viewer. In some implementations, the one-way mirror may form a compact integrated structure with a dimmer for reducing light transmitted to the viewer from the world.

公开(公告)号：US10890769B2

公开(公告)日：2021-01-12

申请号：US16171111

申请日：2018-10-25

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：US12249141B2

公开(公告)日：2025-03-11

申请号：US18582405

申请日：2024-02-20

Applicant: Magic Leap, Inc.

Inventor： Ravi Kumar Komanduri ,  Chulwoo Oh ,  Kevin Messer ,  Ioannis Papadopoulos

IPC: G06V20/20 ,  G02B27/01 ,  G06F18/21 ,  G06F18/22 ,  G06N20/00 ,  G06T3/18 ,  G06V20/62 ,  G06V30/10

Abstract: A pupil separation system includes an input surface and a central portion including one or more dichroic mirrors. The pupil separation system also includes a reflective surface disposed laterally with respect to the central portion and an output surface including a central surface operable to transmit light in a first wavelength range and a peripheral surface operable to transmit light in a second wavelength range different from the first wavelength range. The light in the second wavelength range is reflected by the one or more dichroic mirrors before being reflected by the reflective surface.

公开(公告)号：US12007652B2

公开(公告)日：2024-06-11

申请号：US17252169

申请日：2019-06-13

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh ,  Ravi Kumar Komanduri

IPC: G02F1/1337 ,  G02F1/01 ,  G02B27/01 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1347

CPC classification number: G02F1/133757 ,  G02F1/0136 ,  G02B27/0172 ,  G02F1/133528 ,  G02F1/133633 ,  G02F1/133638 ,  G02F1/133761 ,  G02F1/133776 ,  G02F1/13378 ,  G02F1/13471

Abstract: A switchable optical assembly comprises a switchable waveplate configured to be electrically activated and deactivated to selectively alter the polarization state of light incident thereon. The switchable waveplate comprises first and second surfaces and a first liquid crystal layer disposed between the first and second surfaces. The first liquid crystal layer comprises a plurality of liquid crystal molecules that are rotated about respective axes parallel to a central axis, where the rotation varies with an azimuthal angle about the central axis. The switchable waveplate additionally comprises a plurality of electrodes to apply an electrical signal across said first liquid crystal layer.

公开(公告)号：US11815854B2

公开(公告)日：2023-11-14

申请号：US17100387

申请日：2020-11-20

Applicant: Magic Leap, Inc.

Inventor： Ravi Kumar Komanduri ,  Chulwoo Oh

IPC: G03H1/02

CPC classification number: G03H1/0276 ,  G03H1/0244 ,  G03H2222/31 ,  G03H2222/34 ,  G03H2222/36 ,  G03H2250/38

Abstract: An optical master is created by using a nanoimprint alignment layer to pattern a liquid crystal layer. The nanoimprint alignment layer and the liquid crystal layer constitute the optical master. The optical master is positioned above a photo-alignment layer. The optical master is illuminated and light propagating through the nanoimprinted alignment layer and the liquid crystal layer is diffracted and subsequently strikes the photo-alignment layer. The incident diffracted light causes the pattern in the liquid crystal layer to be transferred to the photo-alignment layer. A second liquid crystal layer is deposited onto the patterned photo-alignment layer, which subsequently is used to align the molecules of the second liquid crystal layer. The second liquid crystal layer in the patterned photo-alignment layer may be utilized as a replica optical master, or as a diffractive optical element for directing light in optical devices such as augmented reality display devices.

公开(公告)号：US20230084882A1

公开(公告)日：2023-03-16

申请号：US17988598

申请日：2022-11-16

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh ,  Ravi Kumar Komanduri ,  Gary Sharp

IPC: G02F1/137 ,  G02B27/01 ,  G02F1/01 ,  G02B30/34 ,  G02F1/13

Abstract: A switchable optical assembly comprises a switchable waveplate configured to be electrically activated and deactivated to selectively alter the polarization state of light incident thereon. The switchable waveplate comprises first and second surfaces and a liquid crystal layer disposed between the first and second surfaces. The first liquid crystal layer comprises a plurality of liquid crystal molecules. Said first and second surfaces may be curved. Said plurality of liquid crystal molecules may vary in tilt with respect to said first and second surfaces with outward radial distance from an axis through said first and second surfaces and said liquid crystal layer in a plurality of radial directions. The switchable waveplate additionally comprises a first plurality of electrodes to apply an electrical signal across said first liquid crystal layer.

公开(公告)号：US11531244B2

公开(公告)日：2022-12-20

申请号：US17252024

申请日：2019-06-13

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh ,  Ravi Kumar Komanduri ,  Gary Sharp

IPC: G02F1/1337 ,  G02F1/1343 ,  G02F1/137 ,  G02B30/34 ,  G02B27/01 ,  G02F1/01 ,  G02F1/13

Abstract: A switchable optical assembly comprises a switchable waveplate configured to be electrically activated and deactivated to selectively alter the polarization state of light incident thereon. The switchable waveplate comprises first and second surfaces and a liquid crystal layer disposed between the first and second surfaces. The first liquid crystal layer comprises a plurality of liquid crystal molecules. Said first and second surfaces may be curved. Said plurality of liquid crystal molecules may vary in tilt with respect to said first and second surfaces with outward radial distance from an axis through said first and second surfaces and said liquid crystal layer in a plurality of radial directions. The switchable waveplate additionally comprises a first plurality of electrodes to apply an electrical signal across said first liquid crystal layer.

公开(公告)号：US11231612B2

公开(公告)日：2022-01-25

申请号：US16171290

申请日：2018-10-25

Applicant: Magic Leap, Inc.

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

IPC: G02F1/1335 ,  G09G5/00 ,  G02B6/12 ,  G09G3/00 ,  G09G5/14 ,  G02B1/00 ,  G02B5/30 ,  G02B5/18 ,  G02B6/122 ,  G02B27/01 ,  G02F1/1337 ,  G06K9/00 ,  G06T19/00

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：US20210356670A1

公开(公告)日：2021-11-18

申请号：US17320060

申请日：2021-05-13

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh ,  Ravi Kumar Komanduri ,  Vikramjit Singh ,  Shuqiang Yang ,  Frank Y. Xu

IPC: G02B6/26 ,  G02B25/00

Abstract: An eyepiece waveguide includes a set of waveguide layers having a world side and a user side. The eyepiece waveguide also includes a first cover plate having a first optical power and disposed adjacent the world side of the set of waveguide layers and a second cover plate having a second optical power and disposed adjacent the user side of the set of waveguide layers.

公开(公告)号：US20210318566A1

公开(公告)日：2021-10-14

申请号：US17252169

申请日：2019-06-13

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh ,  Ravi Kumar Komanduri

IPC: G02F1/1337 ,  G02F1/1347 ,  G02B27/01 ,  G02F1/13363

Abstract: A switchable optical assembly comprises a switchable waveplate configured to be electrically activated and deactivated to selectively alter the polarization state of light incident thereon. The switchable waveplate comprises first and second surfaces and a first liquid crystal layer disposed between the first and second surfaces. The first liquid crystal layer comprises a plurality of liquid crystal molecules that are rotated about respective axes parallel to a central axis, where the rotation varies with an azimuthal angle about the central axis. The switchable waveplate additionally comprises a plurality of electrodes to apply an electrical signal across said first liquid crystal layer.