公开(公告)号：US20230296812A1

公开(公告)日：2023-09-21

申请号：US18042147

申请日：2021-08-16

Applicant: Snap Inc.

Inventor： Jonathan Paul Freeman ,  Rory Thomas Alexander Mills

IPC: G02B1/18 ,  F21V8/00 ,  G02B27/01

CPC classification number: G02B1/18 ,  G02B6/0093 ,  G02B6/0016 ,  G02B27/0172

Abstract: In various embodiments, the disclosed subject-matter includes an optical waveguide for a look-through display is disclosed. The optical waveguide includes a light guiding layer and an anti-contaminant layer. The anti-contaminant layer has substantially no impact on the total internal reflection of light at an interface of the light guiding layer. Other devices and apparatuses are also disclosed.