公开(公告)号：US20240411060A1

公开(公告)日：2024-12-12

申请号：US18798883

申请日：2024-08-09

Applicant: Meta Platforms Technologies, LLC

Inventor： Andrew John Ouderkirk ,  Nagi Hosni Elabbasi ,  Spencer Allan Wells ,  Christopher Stipe ,  Kenneth Alexander Diest ,  Christopher Yuan Ting Liao ,  Liliana Ruiz Diaz ,  Laura Cressman ,  Taha Masood ,  James Howard Thomas Ransley

IPC: G02B3/14

Abstract: A liquid lens includes a substrate, a transparent elastic membrane forming a cavity with the substrate, and a transparent fluid filling the cavity between the substrate and the membrane. The membrane has a pre-distorted, rotationally asymmetric shape in absence of the fluid in the cavity. When the cavity is filled with the fluid and the substrate is disposed vertically w.r.t. gravity at a pre-defined clocking angle, the membrane adopts a substantially rotationally symmetric shape due to elasticity of the membrane counteracting gravity exerting a downward force on the fluid in the cavity, reducing the effect of the gravity sag on optical performance of the liquid lens.

公开(公告)号：US12092844B2

公开(公告)日：2024-09-17

申请号：US17193921

申请日：2021-03-05

Applicant: Meta Platforms Technologies, LLC

Inventor： Andrew John Ouderkirk ,  Nagi Hosni Elabbasi ,  Spencer Allan Wells ,  Christopher Stipe ,  Kenneth Alexander Diest ,  Christopher Yuan Ting Liao ,  Liliana Ruiz Diaz ,  Laura Cressman ,  Taha Masood ,  James Howard Thomas Ransley

IPC: G02B3/14

CPC classification number: G02B3/14

Abstract: A liquid lens includes a substrate, a transparent elastic membrane forming a cavity with the substrate, and a transparent fluid filling the cavity between the substrate and the membrane. The membrane has a pre-distorted, rotationally asymmetric shape in absence of the fluid in the cavity. When the cavity is filled with the fluid and the substrate is disposed vertically w.r.t. gravity at a pre-defined clocking angle, the membrane adopts a substantially rotationally symmetric shape due to elasticity of the membrane counteracting gravity exerting a downward force on the fluid in the cavity, reducing the effect of the gravity sag on optical performance of the liquid lens.

公开(公告)号：US20220348730A1

公开(公告)日：2022-11-03

申请号：US17582574

申请日：2022-01-24

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Sheng Ye ,  Arman Boromand ,  Christopher Yuan Ting Liao ,  Laura Cressman ,  Emma Rae Mullen ,  Andrew John Ouderkirk ,  Hao Mei ,  Cody Wayne Weyhrich ,  Rui Jian

IPC: C08J5/18 ,  H01L41/193 ,  H01L41/333 ,  H01L41/08

Abstract: A polymer thin film includes polyvinylidene fluoride (PVDF) and is characterized by a Young's modulus along an in-plane dimension of at least 4 GPa, an electromechanical coupling factor (k31) of at least 0.1 at room temperature. A method of manufacturing such a polymer thin film may include forming a polymer composition into a polymer thin film, applying a tensile stress to the polymer thin film along at least one in-plane direction and in an amount effective to induce a stretch ratio of at least approximately 5 in the polymer thin film, and applying an electric field across a thickness dimension of the polymer thin film. Annealing and poling steps may separately or simultaneously accompany and/or follow the act of stretching of the polymer thin film.

公开(公告)号：US11889763B2

公开(公告)日：2024-01-30

申请号：US17183302

申请日：2021-02-23

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Andrew John Ouderkirk ,  Spencer Allan Wells ,  Christopher Stipe ,  Kenneth Alexander Diest ,  Christopher Yuan Ting Liao ,  Nagi Hosni Elabbasi ,  James Howard Thomas Ransley ,  Taha Masood ,  Liliana Ruiz Diaz ,  Laura Cressman

IPC: G02B3/12 ,  H10N30/20 ,  G02B26/00 ,  H02N2/04 ,  H10N30/05 ,  H10N30/067 ,  H10N30/87

CPC classification number: H10N30/20 ,  G02B3/12 ,  G02B26/004 ,  H02N2/04 ,  H10N30/05 ,  H10N30/067 ,  H10N30/871

Abstract: An actuator may be integrated into an optical element such as a liquid lens and configured to create spherical curvature as well as a variable cylinder radius and axis in a surface of the optical element. An example actuator may include a stack of electromechanical layers, and electrodes configured to apply an electric field independently across each of the electromechanical layers. Within the stack, an orientation of neighboring electromechanical layers may differ, e.g., stepwise, by at least approximately 10°.