公开(公告)号：US10983356B2

公开(公告)日：2021-04-20

申请号：US16020007

申请日：2018-06-27

Applicant: GOOGLE LLC

Inventor： Stefan Alexander ,  Douglas Raymond Dykaar ,  John Otto Vieth ,  Timothy Paul Bodiya

IPC: G02B27/01 ,  F21V8/00 ,  G02B26/10

Abstract: Systems, devices, and methods for optical waveguides that are well-suited for use in wearable heads-up displays (WHUDs) are described. An optical waveguide includes a volume of optically transparent material, a first holographic optical element (HOE) and a second holographic optical element, wherein the first HOE and the second HOE are carried by the volume of optically transparent material, and the first HOE is positioned across a width of the volume of optically transparent material from the second HOE. Light enters the optical waveguide and is propagated down a length of the waveguide by reflection between the first HOE and the second HOE. Propagation of the light within the optical waveguide does not require total internal reflection. The optical waveguide may include means to in-couple the light into the waveguide and means to out-couple the light from the waveguide. WHUDs that employ such optical waveguides are also described.

公开(公告)号：US10976557B2

公开(公告)日：2021-04-13

申请号：US16020002

申请日：2018-06-27

Applicant: GOOGLE LLC

Inventor： Stefan Alexander ,  Douglas Raymond Dykaar ,  John Otto Vieth ,  Timothy Paul Bodiya

IPC: G02B27/01 ,  F21V8/00 ,  G02B26/10

Abstract: Systems, devices, and methods for optical waveguides that are well-suited for use in wearable heads-up displays (WHUDs) are described. An optical waveguide includes a volume of optically transparent material, a first holographic optical element (HOE) and a second holographic optical element, wherein the first HOE and the second HOE are carried by the volume of optically transparent material, and the first HOE is positioned across a width of the volume of optically transparent material from the second HOE. Light enters the optical waveguide and is propagated down a length of the waveguide by reflection between the first HOE and the second HOE. Propagation of the light within the optical waveguide does not require total internal reflection. The optical waveguide may include means to in-couple the light into the waveguide and means to out-couple the light from the waveguide. WHUDs that employ such optical waveguides are also described.