公开(公告)号：US20250035929A1

公开(公告)日：2025-01-30

申请号：US18716025

申请日：2022-12-05

Applicant: Snap Inc.

Inventor： Alexandra Crai ,  Ciaran Padraic Phelan ,  Christian William Olavi Sol ,  David Louis Maxime Poussin ,  Mohmed Salim Valera ,  Kai Wang ,  Alison Laura Smith ,  Simeng Jia

IPC: G02B27/01

Abstract: An optical assembly is disclosed in which two input pupils of light are projected onto an input grating. The input pupils can be overlapping or non-overlapping. The input grating is configured to receive the input pupils and to diffract them so that they are coupled towards an output element in parallel directions that are laterally separated from one another. The input pupils can be received respectively at a first portion and a second portion of an output element, on either side of a dividing line. The input pupils are received at positions that are symmetrically displaced from the dividing line. The first portion and the second portion are mirror-images of one another, and each can expand light from respective input pupils in an equal and opposite way.