US 12,013,487 B2
Positional tracking systems and methods
Alan Yates, Bellevue, WA (US); and Jeremy Adam Selan, Kirkland, WA (US)
Assigned to Valve Corporation, Bellevue, WA (US)
Filed by Valve Corporation, Bellevue, WA (US)
Filed on Jun. 13, 2022, as Appl. No. 17/839,185.
Application 17/839,185 is a continuation of application No. 16/408,263, filed on May 9, 2019, granted, now 11,378,655.
Application 16/408,263 is a continuation of application No. 14/937,844, filed on Nov. 10, 2015, granted, now 10,338,186, issued on Jul. 2, 2019.
Claims priority of provisional application 62/126,358, filed on Feb. 27, 2015.
Claims priority of provisional application 62/077,374, filed on Nov. 10, 2014.
Prior Publication US 2022/0308167 A1, Sep. 29, 2022
Int. Cl. G01S 7/481 (2006.01); G01S 7/4912 (2020.01); G01S 17/00 (2020.01); G02B 27/01 (2006.01)
CPC G01S 7/481 (2013.01) [G01S 7/4917 (2013.01); G01S 7/4814 (2013.01); G01S 17/003 (2013.01); G02B 27/0172 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical tracking system comprising:
a plurality of optical sensors to be located in a tracking volume as a plurality of fixed optical sensors;
a movable object to be tracked; and
an optical transmitter disposed on the movable object and configured to emit an omnidirectional optical signal and one or more additional optical signals,
wherein individual ones of the plurality of fixed optical sensors are configured to:
scan a field of view to detect the omnidirectional optical signal, and
detect the one or more additional optical signals for computing an angular location within the tracking volume.