公开(公告)号：US20230341692A1

公开(公告)日：2023-10-26

申请号：US18319745

申请日：2023-05-18

Applicant: Magic Leap, Inc.

Inventor： 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

IPC: G02B27/01 ,  G02B27/42 ,  F21V8/00 ,  G02B27/10 ,  G02B6/26 ,  G06T19/00

CPC classification number: G02B27/0172 ,  G02B6/0026 ,  G02B6/26 ,  G02B27/1046 ,  G02B27/4233 ,  G06T19/006 ,  G02B6/10

Abstract: 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. The in-coupling optical element can be truncated or have reduced diffraction efficiency along the propagation direction to reduce the occurrence of light loss due to re-bounce of in-coupled light, resulting in less in-coupled light being prematurely out-coupled and/or absorbed during subsequent interactions with the in-coupling optical element.

公开(公告)号：US20230296993A1

公开(公告)日：2023-09-21

申请号：US18014327

申请日：2021-08-06

Applicant: Magic Leap, Inc.

Inventor： Jeremy Lee SEVIER ,  Satish SADAM ,  Joseph Michael IMHOF ,  Kang LUO ,  Kangkang WANG ,  Roy Matthew PATTERSON ,  Qizhen XUE ,  Brett William BEST ,  Charles Scott CARDEN ,  Matthew S. SHAFRAN ,  Michael Nevin MILLER

IPC: G03F9/00 ,  G03F7/00

CPC classification number: G03F9/7042 ,  G03F7/0002 ,  G03F9/7011 ,  G03F9/7046

Abstract: Systems and methods for managing multi-objective alignments in imprinting (e.g., single-sided or double-sided) are provided. An example system includes rollers for moving a template roll, a stage for holding a substrate, a dispenser for dispensing resist on the substrate, a light source for curing the resist to form an imprint on the substrate when a template of the template roll is pressed into the resist on the substrate, a first inspection system for registering a fiducial mark of the template to determine a template offset, a second inspection system for registering the imprint on the substrate to determine a wafer registration offset between a target location and an actual location of the imprint, and a controller for controlling to move the substrate with the resist below the template based on the template offset, and determine an overlay bias of the imprint on the substrate based on the wafer registration offset.

公开(公告)号：US20230258943A1

公开(公告)日：2023-08-17

申请号：US18308404

申请日：2023-04-27

Applicant: Magic Leap, Inc.

Inventor： Kang LUO ,  Vikramjit SINGH ,  Nai-Wen PI ,  Shuqiang YANG ,  Frank Y. XU

IPC: G02B27/01 ,  G02B6/34

CPC classification number: G02B27/0172 ,  G02B27/0176 ,  G02B6/34 ,  G02B2027/0178

Abstract: Blazed diffraction gratings provide optical elements in head-mounted display systems to, e.g., incouple light into or out-couple light out of a waveguide. These blazed diffraction gratings may be configured to have reduced polarization sensitivity. Such gratings may, for example, incouple or outcouple light of different polarizations with similar level of efficiency. The blazed diffraction gratings and waveguides may be formed in a high refractive index substrate such as lithium niobate. In some implementations, the blazed diffraction gratings may include diffractive features having a feature height of 40 nm to 120 nm, for example, 80 nm. The diffractive features may be etched into the high index substrate, e.g., lithium niobate.

公开(公告)号：US20220075118A1

公开(公告)日：2022-03-10

申请号：US17416248

申请日：2019-12-20

Applicant: Magic Leap, Inc.

Inventor： Xiaopei DENG ,  Vikramjit SINGH ,  Shuqiang YANG ,  Kang LUO ,  Nai-Wen PI ,  Frank Y. XU

IPC: G02B6/13 ,  G02B6/122 ,  G02B27/01

Abstract: Recesses are formed on a front side and a rear side of a waveguide. A solid porogen material is spun onto the front side and the rear side and fills the recesses. First front and rear cap layers are then formed on raised formations of the waveguide and on the solid porogen material. The entire structure is then heated and the solid porogen material decomposes to a porogen gas. The first front and rear cap layers are porous to allow the porogen gas to escape and air to enter into the recesses. The air maximizes a difference in refractive indices between the high-index transparent material of the waveguide and the air to promote reflection in the waveguide from interfaces between the waveguide and the air.