公开(公告)号：US20240093984A1

公开(公告)日：2024-03-21

申请号：US18088302

申请日：2022-12-23

Applicant: Meta Platforms Technologies, LLC

Inventor： Guohua Wei ,  Petr Markov ,  Qing Chao

IPC: G01B11/25 ,  G02B6/12 ,  G02B27/00 ,  G02B27/01 ,  G06V40/18 ,  H01S5/183 ,  H01S5/40

CPC classification number: G01B11/2513 ,  G02B6/12004 ,  G02B27/0093 ,  G02B27/017 ,  G06V40/18 ,  H01S5/18305 ,  H01S5/4031 ,  G02B2006/12038 ,  G02B2006/1204 ,  G02B2006/12061 ,  G02B2027/0178 ,  G06V2201/12

Abstract: An optical system is configured to support eye tracking operations in a head mounted device. The optical system includes a transparent layer, a laser, and first and second output couplers. The laser is configured to emit light into the transparent layer. The first output coupler is configured to out-couple a first portion of the light from a first location of the transparent layer. The second output coupler is configured to out-couple a second portion of the light from a second location of the transparent layer. The first and second output couplers are in the field-of-view of a user. A combination of the first portion of the light and the second portion of the light out-coupled from the first output coupler and the second output coupler is configured to generate a fringe pattern, for example, on an eye of a user of the head mounted device.

公开(公告)号：US20240295690A1

公开(公告)日：2024-09-05

申请号：US18441693

申请日：2024-02-14

Applicant: Meta Platforms Technologies, LLC

Inventor： Dusan COSO ,  Steven Alexander-Boyd Hickman ,  Giuseppe Calafiore ,  Petr Markov ,  Shermin Arab ,  John Michael Goward ,  Rahul Agarwal ,  Zhujun Shi

IPC: G02B6/12

CPC classification number: G02B6/12 ,  G02B2006/12121

Abstract: According to examples, an apparatus for implementing a hermetically-covered photonic integrated circuit on a substrate having an integrated laser diode is described. The apparatus may include a cover wafer, a housing layer including a waveguide, the waveguide including a photonic integrated circuit, a laser die including a laser cavity, and a base substrate. The base substrate may include an emission window to provide a reflective design and to eliminate a need for a polarized beam splitter, a through-wafer via element to electrical coupling to the laser die and one or more pillars to set a height of the laser die relative to the photonic integrated circuit.