US 12,130,960 B2
Tracker for a head-mounted display
Andreas Reutter, Berlin (DE); and Christopher Özbek, Berlin (DE)
Assigned to Stryker European Operations Limited, Carrigtwohill (IE)
Filed by Stryker European Operations Limited, Carrigtwohill (IE)
Filed on Nov. 15, 2022, as Appl. No. 18/055,633.
Application 18/055,633 is a continuation of application No. 16/904,634, filed on Jun. 18, 2020, granted, now 11,526,207.
Claims priority of application No. 19184373 (EP), filed on Jul. 4, 2019.
Prior Publication US 2023/0073227 A1, Mar. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/00 (2006.01); A61B 34/20 (2016.01); A61B 90/00 (2016.01); G02B 27/01 (2006.01); G06F 3/01 (2006.01)
CPC G06F 3/012 (2013.01) [A61B 34/20 (2016.02); A61B 90/37 (2016.02); G02B 27/0176 (2013.01); A61B 2034/2055 (2016.02); A61B 2034/2074 (2016.02); A61B 2090/365 (2016.02); A61B 2090/372 (2016.02); A61B 2090/373 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A Head-Mounted Display (“HMD”) for a surgical navigation system, the HMD comprising:
a HMD unit which comprises a head-mountable structure and is configured as or to accommodate a display; and
a tracker separate from the display comprising a carrier element that is carrying at least two markers that are configured to permit determining a position of the tracker and that is detachably attached to the HMD unit or to a base element fixed to the HMD unit, so as to extend in a circumferential direction of the HMD unit, wherein the tracker is detachably attached to the HMD unit;
wherein the at least two markers comprise:
one or more passive flat-shaped markers; and
one or more passive sphere-shaped markers.