公开(公告)号：US11789186B1

公开(公告)日：2023-10-17

申请号：US17216038

申请日：2021-03-29

Applicant: Meta Platforms Technologies, LLC

Inventor： Giuseppe Calafiore ,  Austin Lane ,  Matthew E. Colburn

IPC: G02B5/18 ,  G02B6/34 ,  G03F7/00

CPC classification number: G02B5/1857 ,  G02B6/34 ,  G03F7/0005

Abstract: An optical device with a variable index of refraction is formed by exposing a film to an energy gradient. The optical device has angular selectivity. The optical device can be used as an output coupler for a waveguide used in a virtual-reality and/or augmented-reality apparatus.

公开(公告)号：US11780819B2

公开(公告)日：2023-10-10

申请号：US17098130

申请日：2020-11-13

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Lafe Purvis ,  Austin Lane ,  Matthew E. Colburn

IPC: C07D303/18 ,  C07C321/28 ,  C07C271/54 ,  C07C271/58 ,  C07C333/04 ,  G03H1/02 ,  C07C321/20 ,  C08L33/14

CPC classification number: C07D303/18 ,  C07C271/54 ,  C07C271/58 ,  C07C321/20 ,  C07C321/28 ,  C07C333/04 ,  C08L33/14 ,  G03H1/0248 ,  G03H2001/0264 ,  G03H2223/24 ,  G03H2260/12

Abstract: The disclosure provides recording materials including aromatic substituted alkane-core derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several structures are disclosed, including Formula I. When used in Bragg gratings applications, the monomers and polymers disclosed lead to materials with higher refractive index, low birefringence, and high transparency. The disclosed derivatized monomers and polymers can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer.

公开(公告)号：US11718580B2

公开(公告)日：2023-08-08

申请号：US16865073

申请日：2020-05-01

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Austin Lane ,  Matthew E. Colburn ,  Lafe Purvis

IPC: G03H1/02 ,  C07C69/54 ,  C07C271/48 ,  C07C323/62 ,  G03F7/035 ,  G03F7/027 ,  G03F7/025

CPC classification number: C07C271/48 ,  C07C69/54 ,  C07C323/62 ,  G03F7/025 ,  G03F7/027 ,  G03H1/0248 ,  G03H2001/0264 ,  G03H2260/12

Abstract: The disclosure provides recording materials include fluorene derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several fluorene structures are disclosed: simply substituted fluorenes, cardo-fluorenes, and spiro-fluorenes. Fluorene derivatized polymers in Bragg gratings applications lead to materials with higher refractive index, low birefringence, and high transparency. Fluorene derivatized monomers/polymers can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer.

公开(公告)号：US11709422B2

公开(公告)日：2023-07-25

申请号：US17024081

申请日：2020-09-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Elliott Franke ,  Nihar Ranjan Mohanty ,  Ankit Vora ,  Austin Lane ,  Matthew E. Colburn

IPC: G03F7/00 ,  G03F7/09 ,  G03F7/11 ,  G02B27/01 ,  G03F7/12 ,  F21V8/00

CPC classification number: G03F7/0005 ,  G02B6/0016 ,  G02B6/0038 ,  G02B6/0065 ,  G02B27/0172 ,  G03F7/091 ,  G03F7/11 ,  G03F7/12 ,  G02B2027/0178

Abstract: Gray-tone lithography techniques for controlling the thickness profile of an overcoat layer on a surface-relief grating that has a non-uniform grating parameter (e.g., depth, duty cycle, or period), compensating for the non-uniform etch rate in a large area, defining etch/block regions, and/or controlling the thickness of the grating layer.

公开(公告)号：US11634528B2

公开(公告)日：2023-04-25

申请号：US16865022

申请日：2020-05-01

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Austin Lane ,  Matthew E. Colburn

IPC: C08F283/00 ,  C08F2/48 ,  G02B1/04 ,  G02B5/02 ,  G02B5/18 ,  G02B5/20

Abstract: Initiator/mediator chemistry for latent imaging polymers for volume Bragg gratings is provided. Light mediated chemistry including the use of nitroxides allows a first step imaging to occur, where a light induced pattern is recorded in the material, without the grating being apparent. A second bleaching/developing step completes the curing process and reveals the grating.

公开(公告)号：US20230152500A1

公开(公告)日：2023-05-18

申请号：US18097973

申请日：2023-01-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Marvin Dion Alim ,  Austin Lane ,  Kavous Jorabchi ,  Yang Yang ,  Janee Ashley McNeil

IPC: G02B5/18 ,  G02B6/34 ,  G02B1/04

CPC classification number: G02B5/1857 ,  G02B6/34 ,  G02B1/04

Abstract: A grating coupler may be fabricated by exposing a photopolymer layer to grating forming light for forming periodic refractive index variations in the photopolymer layer. The photopolymer layer may be exposed to apodization light for reducing an amplitude of the periodic refractive index variations in a spatially-selective manner. The apodization may also be achieved or facilitated by subjecting outer surface(s) of the photopolymer layer to a chemically reactive agent that causes the refractive index contrast to be reduced near the surface(s) of application. The apodized refractive index profile of the gratings facilitates the reduction of optical crosstalk between different gratings of the grating coupler.

公开(公告)号：US11733647B2

公开(公告)日：2023-08-22

申请号：US16840124

申请日：2020-04-03

Applicant: Meta Platforms Technologies, LLC

Inventor： Austin Lane ,  Matthew E. Colburn

IPC: G03H1/02 ,  C08L75/04 ,  C08F2/48 ,  C08F20/18

CPC classification number: G03H1/02 ,  C08F2/48 ,  C08F20/18 ,  C08L75/04 ,  C08F2438/01 ,  C08F2438/03 ,  G03H2001/0264

Abstract: Techniques disclosed herein relate to holographic optical materials and elements. An example of a holographic recording material includes matrix monomers characterized by a first refractive index and configured to polymerize to form a polymer matrix, writing monomers dispersed in the matrix monomers and characterized by a second refractive index different from the first refractive index, and a photocatalyst for controlled radical polymerization of the writing monomers. The writing monomers are configured to polymerize upon exposed to recording light. The photocatalyst is dispersed in the matrix monomers. The photocatalyst includes, for example, a transition metal photocatalyst or a metal-free organic photocatalyst, such as a photocatalyst for atom transfer radical polymerization or a transition metal photocatalyst for addition fragmentation chain transfer polymerization.