公开(公告)号：US11782305B1

公开(公告)日：2023-10-10

申请号：US17878442

申请日：2022-08-01

Applicant: Meta Platforms Technologies, LLC

Inventor： Changwon Jang ,  Afsoon Jamali ,  Zhimin Shi ,  Arman Boromand

IPC: G02F1/1335 ,  G02F1/1334 ,  G02F1/1343 ,  G02F1/1341 ,  G02B27/01 ,  G02F1/1337

CPC classification number: G02F1/133548 ,  G02B27/0172 ,  G02F1/1334 ,  G02F1/1341 ,  G02F1/133711 ,  G02F1/134309 ,  G02B2027/0178

Abstract: A device is provided. The device includes a first liquid crystal (“LC”) cell configured to modulate an amplitude of a light beam. The device also includes a second LC cell stacked with the first LC cell and configured to modulate a phase of the light beam. The device includes a sandwiched electrode layer disposed between the first LC cell and the second LC cell. The sandwiched electrode layer includes a conductive polymer film configured to function as a common electrode layer for driving at least one of the first LC cell or the second LC cell.

公开(公告)号：US20230288731A1

公开(公告)日：2023-09-14

申请号：US18120004

申请日：2023-03-10

Applicant: Kent State University ,  META PLATFORMS TECHNOLOGIES, LLC

Inventor： Amit Kumar Bhowmick ,  Doug Bryant ,  Philip Bos ,  Afsoon Jamali

IPC: G02C7/08

CPC classification number: G02C7/083 ,  G02C2202/22 ,  G02C2202/18

Abstract: A non-mechanical, electrically tunable optical system provides both focus and astigmatism power correction with an adjustable axis. The optical system includes three liquid crystal based cylindrical lenses which are simple, low cost, and have compact flat structure.

公开(公告)号：US11747655B2

公开(公告)日：2023-09-05

申请号：US17122311

申请日：2020-12-15

Applicant: Meta Platforms Technologies, LLC

Inventor： Changwon Jang ,  Afsoon Jamali

IPC: G02F1/01 ,  G02F1/139 ,  G02F1/133

CPC classification number: G02F1/0136 ,  G02F1/1396 ,  G02F1/13306

Abstract: A device includes a segmented polarization switch including a plurality of polarization switch segments. The device also includes a polarization selective optical element (“PSOE”) optically coupled to the segmented polarization switch and including a plurality of polarization selective segments. The device further includes a controller configured to control the polarization switch segments to operate in a switching state or a non-switching state to control optical states of the polarization selective segments.

公开(公告)号：US11686942B2

公开(公告)日：2023-06-27

申请号：US16730293

申请日：2019-12-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Yang Zhao ,  Afsoon Jamali ,  Junren Wang ,  Wai Sze Tiffany Lam ,  Lu Lu ,  Douglas Robert Lanman

IPC: G02F1/137 ,  G02B27/01 ,  G03B13/36

CPC classification number: G02B27/0172 ,  G02F1/13718 ,  G03B13/36

Abstract: A display system includes a source of unpolarized image light, and a stack of polarization-selective optical elements operable to switchably convert the unpolarized image light into two orthogonally polarized light beams, each of which being switchable in at least one beam characteristic. An output polarizer selects one of the two orthogonally polarized light beams for providing to a user. A depolarizer may be disposed between an electronic display emitting polarized light and the stack. The depolarizer may be in the form of an LC bilayer with randomized in-plane optic axis.

公开(公告)号：US11598964B2

公开(公告)日：2023-03-07

申请号：US16854528

申请日：2020-04-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Gang Li ,  Changwon Jang

IPC: G02B27/01 ,  G02F1/137 ,  G02B15/16 ,  G02B27/00 ,  G02B5/30 ,  G02F1/29

Abstract: A freeform varifocal optical assembly includes at least three optical modules including a first plurality of optical elements including Pancharatnam-Berry phase (PBP) lenses, polarization sensitive hologram (PSH) lenses, metamaterials, or combinations thereof. The plurality of optical elements of each optical module include a property associated with a Zernike polynomial. Each of the first and the three optical modules are configurable between a plurality of optical powers. The freeform varifocal optical assembly is configurable to output a predetermined wavefront in response to an input wavefront.

公开(公告)号：US11435641B1

公开(公告)日：2022-09-06

申请号：US17137916

申请日：2020-12-30

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Afsoon Jamali ,  Arman Boromand ,  Jasmine Soria Sears ,  Sandro Pintz

IPC: G02F1/139 ,  G02F1/133

Abstract: A switchable optical retardation device includes a switchable retardation element including liquid crystals and an electrical driver circuit. While in a first state, the switchable retardation element modifies light transmitted through the switchable retardation element by causing a phase shift of a first retardation angle. While in a second state, the switchable retardation element modifies the light transmitted through the switchable retardation element by causing a phase shift of a second retardation angle distinct from the first retardation angle. The electrical driver circuit provides a first voltage for placing the switchable retardation element in the first state and a second voltage for placing the switchable retardation element in the second state. The first voltage is greater than the second voltage, the second voltage is a non-zero voltage, and the electrical driver circuit alternatingly provides the first voltage and the second voltage with a predefined frequency.