US 12,111,981 B2
Method and system utilizing phased array beamforming for six degree of freedom tracking for an emitter in augmented reality systems
Michael Janusz Woods, Mountain View, CA (US)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Filed by Magic Leap, Inc., Plantation, FL (US)
Filed on Jun. 21, 2023, as Appl. No. 18/212,645.
Application 18/212,645 is a continuation of application No. 17/458,890, filed on Aug. 27, 2021, granted, now 11,726,582.
Application 17/458,890 is a continuation of application No. PCT/US2020/020178, filed on Feb. 27, 2020.
Claims priority of provisional application 62/811,914, filed on Feb. 28, 2019.
Prior Publication US 2023/0333670 A1, Oct. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/0346 (2013.01); G01S 13/02 (2006.01); G02B 27/00 (2006.01); G06F 3/01 (2006.01)
CPC G06F 3/0346 (2013.01) [G02B 27/0087 (2013.01); G06F 3/012 (2013.01); G06F 3/016 (2013.01); G01S 2013/0245 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electromagnetic tracking system comprising:
a handheld controller including an electromagnetic emitter, the electromagnetic emitter including:
a first phased array element characterized by a first phase; and
a second phased array element characterized by a second phase different than the first phase wherein the first phased array element and the second phased array element are configured to generate a steerable electromagnetic beam characterized by an electromagnetic field pattern; and
a head mounted display including an electromagnetic sensor configured to sense the electromagnetic field pattern;
wherein the electromagnetic tracking system is configured to:
control the first phase and the second phase to steer the electromagnetic beam to increase received power at the electromagnetic sensor; and
determine a pose of the handheld controller relative to the electromagnetic sensor using the electromagnetic field pattern sensed at the electromagnetic sensor.