公开(公告)号：EP3938819A1

公开(公告)日：2022-01-19

申请号：EP20781216.5

申请日：2020-09-15

Applicant: Apple Inc.

Inventor： PFEIFFER, Jonathan B. ,  URNESS, Adam C.

IPC: G02B5/20 ,  G02B5/22 ,  F21V8/00 ,  G02B27/01

公开(公告)号：EP4332664A3

公开(公告)日：2024-05-15

申请号：EP24150759.9

申请日：2020-05-26

Applicant: Apple Inc.

Inventor： PFEIFFER, Jonathan B. ,  AIETA, Francesco ,  OH, Se Baek ,  SCHLOTTAU, Friso ,  URNESS, Adam C.

IPC: G02B27/42

CPC classification number: G02B27/0081 ,  G02B27/4211 ,  G02B27/0172 ,  G02B27/4272 ,  G02B2027/017420130101 ,  G02B2027/013420130101 ,  G02B6/0011 ,  G02B6/0015

Abstract: An electronic device may include a display that generates light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide, a non-diffractive input coupler, a cross coupler, and an output coupler. The cross coupler may expand the light in a first direction. The cross coupler may perform an even number of diffractions on the light and may couple the light back into the waveguide at an angle suitable for total internal reflection. The output coupler may expand the light in a second direction while coupling the light out of the waveguide. The cross coupler may include surface relief gratings or holographic gratings embedded within the waveguide or formed in a separate substrate. The optical system may direct the light towards the eye box without chromatic dispersion and while supporting an expanded field of view and optical bandwidth.

公开(公告)号：EP4332664A2

公开(公告)日：2024-03-06

申请号：EP24150759.9

申请日：2020-05-26

Applicant: Apple Inc.

Inventor： PFEIFFER, Jonathan B. ,  AIETA, Francesco ,  OH, Se Baek ,  SCHLOTTAU, Friso ,  URNESS, Adam C.

IPC: G02B27/42

Abstract: An electronic device may include a display that generates light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide, a non-diffractive input coupler, a cross coupler, and an output coupler. The cross coupler may expand the light in a first direction. The cross coupler may perform an even number of diffractions on the light and may couple the light back into the waveguide at an angle suitable for total internal reflection. The output coupler may expand the light in a second direction while coupling the light out of the waveguide. The cross coupler may include surface relief gratings or holographic gratings embedded within the waveguide or formed in a separate substrate. The optical system may direct the light towards the eye box without chromatic dispersion and while supporting an expanded field of view and optical bandwidth.