US 11,836,283 B2
Method of operating a directed emitter/sensor for electromagnetic tracking in augmented reality systems
Richmond B. Chan, Arlington Heights, IL (US)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Filed by Magic Leap, Inc., Plantation, FL (US)
Filed on Aug. 26, 2022, as Appl. No. 17/896,917.
Application 17/896,917 is a continuation of application No. 17/145,177, filed on Jan. 8, 2021, granted, now 11,460,913.
Application 17/145,177 is a continuation of application No. 16/561,669, filed on Sep. 5, 2019, granted, now 10,915,164, issued on Feb. 9, 2021.
Claims priority of provisional application 62/727,489, filed on Sep. 5, 2018.
Prior Publication US 2022/0404904 A1, Dec. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/01 (2006.01); G01B 7/004 (2006.01)
CPC G06F 3/011 (2013.01) [G01B 7/004 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of operating a head mounted augmented reality display system, the method comprising:
producing an electromagnetic field using an electromagnetic emitter, positioned in a handheld controller;
reflecting the electromagnetic field using a first electromagnetic reflector, positioned adjacent to the electromagnetic emitter, to form a modified electromagnetic field, wherein:
the first electromagnetic reflector defines a first coordinate space and a first corner vertex of a first cube lies at the origin of the first coordinate space; and
the electromagnetic emitter is positioned along a line directed at point (1,1,1) in the first coordinate space;
reflecting a portion of the modified electromagnetic field using a second electromagnetic reflector positioned in a headset; and
detecting the reflected portion of the modified electromagnetic field by an electromagnetic sensor positioned adjacent to the second electromagnetic reflector.