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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Bibliographische Detailangaben
Hauptverfasser:	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
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS
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Beschreibung
Zusammenfassung:	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.