公开(公告)号：US20230296822A1

公开(公告)日：2023-09-21

申请号：US17695995

申请日：2022-03-16

Applicant: GOOGLE LLC

Inventor： Shreyas Potnis ,  Timothy Paul Bodiya ,  Dan Adema

IPC: F21V8/00 ,  G02B26/10 ,  G02B26/08

CPC classification number: G02B6/005 ,  G02B26/101 ,  G02B26/0816

Abstract: A system includes a feedback loop that includes a light engine to generate light, a light engine controller to control operation of the light engine, a scanning device to scan a light beam across a range of scan angles to an incoupler of a waveguide, a photo-sensor to measure an amount of light outcoupled through the incoupler of the waveguide at the range of incident angles. The light engine controller adjusts one or more of a pulse duration, a phase, or a pulse frequency of the scanned light, based on an incident angle of the scanned light and the measured amount of light.