公开(公告)号：US11726326B1

公开(公告)日：2023-08-15

申请号：US16899455

申请日：2020-06-11

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Adrian Travis ,  Babak Amirsolaimani

IPC: G02B27/01 ,  F21V8/00 ,  G02B27/00 ,  G03H1/02

CPC classification number: G02B27/0172 ,  G02B6/0056 ,  G02B27/0012 ,  G03H1/0248 ,  G02B2027/0174 ,  G02B2027/0178

Abstract: An optical device includes an optical assembly having a first end and a second end, the optical assembly including a first optical component and a second optical component, the first optical component having at least a first optical surface, a second optical surface, and a third optical surface that are non-parallel to one another. The first optical surface is curved and extends between the first end and the second end. A first polarization selective redirector is located between the first optical component and the second optical component, and a first polarization rotating redirector is disposed at the second end.

公开(公告)号：US11719876B2

公开(公告)日：2023-08-08

申请号：US17721282

申请日：2022-04-14

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Ying Geng ,  Adrian Travis ,  Gang Li

IPC: F21V8/00 ,  G02B5/32 ,  G02B27/01

CPC classification number: G02B6/0061 ,  G02B5/32 ,  G02B6/0046 ,  G02B6/0051 ,  G02B6/0068 ,  G02B27/0172 ,  G02B2027/0174

Abstract: A device for illuminating a spatial light modulator includes a light source and an optical element. The light source is configured to provide illumination light. The optical element has a first surface, a second surface that is distinct from and non-parallel to the first surface, and a third surface that is distinct from and non-parallel to the first surface and the second surface. The optical element is configured to receive the illumination light at the first surface, propagate the illumination light via total internal reflection, and output the illumination light from the third surface. Also disclosed is a method performed by the device.