公开(公告)号：US20250035836A1

公开(公告)日：2025-01-30

申请号：US18226069

申请日：2023-07-25

Applicant: GOOGLE LLC

Inventor： Ahmed Drammeh ,  Christophe Peroz ,  Constantin-Christian A. Voll ,  Ali Karbasi

IPC: F21V8/00 ,  G02B27/01

Abstract: Overmolding or overcasting one portion of a reflective waveguide to another portion achieves bonding of components of the reflective waveguide without the need for an index-matched adhesive or an alignment platform for bonding. In embodiments in which one portion is overmolded to the other, the materials used to form the portions are selected such that the material used to form a first portion has a glass transition temperature (Tg) that is higher than the Tg of the material used to form a second portion. In embodiments in which one portion is overcasted to the other, the materials used to form the first portion and the second portion are thermosetting resins and are selected such that both materials have solubility parameters that approximately match each other.

公开(公告)号：US20230341688A1

公开(公告)日：2023-10-26

申请号：US18137397

申请日：2023-04-20

Applicant: GOOGLE LLC

Inventor： Joseph Daniel Lowney ,  Ali Karbasi

IPC: G02B27/01 ,  G02B27/00

CPC classification number: G02B27/0172 ,  G02B27/0081 ,  G02B2027/0178

Abstract: A first waveguide of a stacked waveguide located closest to the eye of a user operates in a reflection mode such that the set of grating structures of the first waveguide are disposed on a surface of the first waveguide opposite the eye of the user and towards the interior of the stacked waveguide. Additionally, a second waveguide of the stacked waveguide located further from the eye of the user operates in a transmission mode such that the grating structures of the second waveguide are disposed on a surface of the second waveguide facing the eye of the user and facing the interior of the stacked waveguide.

公开(公告)号：US12276792B2

公开(公告)日：2025-04-15

申请号：US17854825

申请日：2022-06-30

Applicant: GOOGLE LLC

Inventor： Syed Moez Haque ,  Shreyas Potnis ,  Ali Karbasi ,  Timothy Paul Bodiya ,  Daniel Adema ,  Ian Andrews

IPC: G02B27/01 ,  G02B1/115 ,  G02B6/42

Abstract: A head-mounted display (HMD) system includes a lens element supported by a support structure. The lens element includes a waveguide that includes an incoupler, an outcoupler, and an exit pupil expander. The incoupler is disposed within a first area of the waveguide. The outcoupler is disposed within a second area of the waveguide. The exit pupil expander is disposed within a third area of the waveguide. An anti-reflection coating is formed via fabrication used to form the incoupler, the outcoupler, and the exit pupil expander. The anti-reflection coating is disposed within a fourth area of the waveguide different than the first, second, and third areas of the waveguide.

公开(公告)号：US20230003953A1

公开(公告)日：2023-01-05

申请号：US17854825

申请日：2022-06-30

Applicant: GOOGLE LLC

Inventor： Syed Moez Haque ,  Shreyas Potnis ,  Ali Karbasi ,  Timothy Paul Bodiya ,  Daniel Adema ,  Ian Andrews

IPC: G02B6/42 ,  G02B27/01

Abstract: A head-mounted display (HMD) system includes a lens element supported by a support structure. The lens element includes a waveguide that includes an incoupler, an outcoupler, and an exit pupil expander. The incoupler is disposed within a first area of the waveguide. The outcoupler is disposed within a second area of the waveguide. The exit pupil expander is disposed within a third area of the waveguide. An anti-reflection coating is formed via fabrication used to form the incoupler, the outcoupler, and the exit pupil expander. The anti-reflection coating is disposed within a fourth area of the waveguide different than the first, second, and third areas of the waveguide.