公开(公告)号：US20220269083A1

公开(公告)日：2022-08-25

申请号：US17580745

申请日：2022-01-21

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Stuart James Myron Nicholson

IPC: G02B27/01 ,  G02B27/28 ,  G02B27/14

Abstract: Systems, devices, and methods for accommodating multiple sets of laser light sources in an optical engine of a display system such as a laser projection system are described. Laser light beams may be combined via wavelength-, polarization-, and/or angular-separation-based techniques. First and second sets of laser light beams may be angularly separated such that different sets of partially overlapping pixels are projected by the system, thereby increasing the display pixel density and/or an expanding the field of view of the display. One or more laser die may be mounted to each submount of the optical engine. For embodiments with two laser dies on each submount, collimating lenses may introduce angular separation between laser light beams output by each pair of commonly mounted laser dies. A retroreflector prism may be disposed at a beam combiner to provide a compact extension of the optical path through the beam combiner.

公开(公告)号：US20220057637A1

公开(公告)日：2022-02-24

申请号：US17517290

申请日：2021-11-02

Applicant: GOOGLE LLC

Inventor： Stuart James Myron Nicholson ,  Timothy Paul Bodiya ,  Stefan Alexander

IPC: G02B27/01 ,  G02B6/00 ,  F21V8/00 ,  G02B27/00

Abstract: Systems, devices, and methods for eyebox expansion in wearable heads-up displays (“WHUDs”) are described. The WHUDs described herein each include a projector and an optical waveguide positioned in an optical path between the projector and an eye of the user. For any given light signal from the projector, the optical waveguide receives the light signal at an input coupler and outputs multiple instances or copies of the light signal from multiple discrete, spatially-separated output couplers. The multiple instances or copies of the light signal may be converged by the optical waveguide directly to respective exit pupils at the user's eye or may be routed by the optical waveguide to a holographic combiner in the user's field of view from which the light signals may be converged to respective exit pupils at the user's eye. The optical waveguide employs exit pupil replication to expand the eyebox of the WHUD.

公开(公告)号：US11175506B2

公开(公告)日：2021-11-16

申请号：US16143025

申请日：2018-09-26

Applicant: GOOGLE LLC

Inventor： Stuart James Myron Nicholson ,  Timothy Paul Bodiya ,  Stefan Alexander

IPC: G02B27/01 ,  F21V8/00 ,  G02B27/00 ,  G02B6/00

Abstract: Systems, devices, and methods for eyebox expansion in wearable heads-up displays (“WHUDs”) are described. The WHUDs described herein each include a projector and an optical waveguide positioned in an optical path between the projector and an eye of the user. For any given light signal from the projector, the optical waveguide receives the light signal at an input coupler and outputs multiple instances or copies of the light signal from multiple discrete, spatially-separated output couplers. The multiple instances or copies of the light signal may be converged by the optical waveguide directly to respective exit pupils at the user's eye or may be routed by the optical waveguide to a holographic combiner in the user's field of view from which the light signals may be converged to respective exit pupils at the user's eye. The optical waveguide employs exit pupil replication to expand the eyebox of the WHUD.