EYE TRACKING WITH SWITCHABLE GRATINGS

A pupil-replicating lightguide includes a slab of transparent material, a switchable out-coupling grating for out-coupling portions of image light to propagate towards an eyebox, and a switchable tracking grating for redirecting tracking light carrying an eye image towards an eye tracking camera. On...

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Bibliographic Details
Main Authors Amirsolaimani, Babak, Diorio, Nicholas John, He, Sihui, Landig, Renate Eva Klementine, Shi, Zhimin, Greif, Daniel Guenther, Feng, Xiayu, Yang, Yang, Calafiore, Giuseppe, Malhotra, Tanya, Peng, Fenglin, Chi, Wanli, Ouderkirk, Andrew John, Gollier, Jacques, Parsons, Maxwell
Format Patent
LanguageEnglish
Published 08.06.2023
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:A pupil-replicating lightguide includes a slab of transparent material, a switchable out-coupling grating for out-coupling portions of image light to propagate towards an eyebox, and a switchable tracking grating for redirecting tracking light carrying an eye image towards an eye tracking camera. One of the two gratings may be turned ON while the other is turned OFF, in a time-sequential manner, allowing the combined use of the pupil-replicating lightguide for carrying image light and eye tracking light.
Bibliography:Application Number: US202217697592