公开(公告)号：US20240295763A1

公开(公告)日：2024-09-05

申请号：US18515795

申请日：2023-11-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Kenneth Alexander Diest ,  Spencer Allan Wells ,  Zhaohui Yang ,  Nihar Ranjan Mohanty ,  Richard Farrell ,  Jilin Yang ,  Ehsan Arbabi

IPC: G02F1/05 ,  C03C17/23 ,  C30B29/30 ,  C30B29/32 ,  G02B6/34 ,  G03F7/00

CPC classification number: G02F1/05 ,  C03C17/23 ,  C30B29/30 ,  C30B29/32 ,  G02B6/34 ,  G03F7/0002 ,  G03F7/0005 ,  C03C2217/228 ,  C03C2217/23 ,  C03C2217/92

Abstract: A device includes a pair of electrodes and a dynamic material disposed between the pair of electrodes, the dynamic material including a crystalline microstructure configured to change between at least two states in response to a change in an electric field between the two electrodes. A material includes tetragonal lead magnesium niobate-lead titanate (PMN-PT) and at least one lanthanide series element. A method includes doping a lead magnesium niobate-lead titanate material with at least one lanthanide series element, and processing the PMN-PT material to form tetragonal PMN-PT. A further method includes forming a low refractive index nanostructured grating over a carrier substrate, forming a high refractive index layer over the low refractive index grating to produce a nanostructured coupling element, forming an adhesive layer over the nanostructured coupling element, and affixing the nanostructured coupling element to a high index waveguide.

公开(公告)号：US20230418070A1

公开(公告)日：2023-12-28

申请号：US18305739

申请日：2023-04-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Randall Scott Toy ,  James Schultz ,  Zhiqiang Liu ,  Jilin Yang

IPC: G02B27/01 ,  G02B27/18

CPC classification number: G02B27/0172 ,  G02B27/18 ,  G02B2027/0178

Abstract: Optical assemblies may include a projector assembly, a waveguide, and at least two standoffs. The projector assembly may include at least one light projector and a housing. The waveguide may include at least one input grating corresponding to the at least one light projector. The standoffs may be between the housing and the waveguide, and may be configured for aligning the at least one light projector with the at least one input grating. Related head-mounted displays, systems, and methods are also disclosed.