公开(公告)号：US20190339515A1

公开(公告)日：2019-11-07

申请号：US16403027

申请日：2019-05-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vivek Kumar THAKUR ,  John M. FERRI ,  Paul L. RANCURET

IPC: G02B27/00 ,  G02B27/28 ,  G02B27/14 ,  G02B27/12 ,  F21V8/00

Abstract: The pupil formed by an optical apparatus is expanded by use of a beam splitter to replicate the pupil and a waveguide to further replicate the replicated pupil. An optional rotator element can rotate a portion of the light split by the beam splitter to provide consistent polarization of light in the optical apparatus. In some embodiments, the beam splitter replication expands the pupil in one direction, while the waveguide replication expands the pupil in a second direction.