US 11,992,272 B2
Optical tracking device with optically distinguishable lines
Gerd Ulrich Gamm, Freiburg (DE); Emeric Umbdenstock, Freiburg (DE); Reinhold Zimmermann, Freiburg (DE); Fabian Riegelsberger, Umkirch (DE); Florian Herrmann, Schwanau (DE); and Jochen Breisacher, Teningen (DE)
Assigned to Stryker European Operations Holdings LLC, Kalamazoo, MI (US)
Filed by Stryker European Operations Holdings LLC, Kalamazoo, MI (US)
Filed on Jan. 17, 2020, as Appl. No. 16/745,660.
Claims priority of application No. 19153075 (EP), filed on Jan. 22, 2019; and application No. 19175876 (EP), filed on May 22, 2019.
Prior Publication US 2020/0229874 A1, Jul. 23, 2020
Int. Cl. A61B 34/20 (2016.01); A61B 17/34 (2006.01); A61B 17/70 (2006.01)
CPC A61B 34/20 (2016.02) [A61B 17/3403 (2013.01); A61B 17/7002 (2013.01); A61B 2034/2055 (2016.02); A61B 2034/2057 (2016.02)] 19 Claims
OG exemplary drawing
 
1. An optical tracking device configured to be used in a surgical navigation system, the optical tracking device comprising:
a body having at least two optically distinguishable lines configured to be detected by an optical detection system of the surgical navigation system simultaneously, wherein the lines have a fixed spatial relationship between each other and at least one of the lines is an edge of the body, and wherein the lines do not lie in a single plane; and
at least one light emitter disposed in the body and configured to illuminate a first of the lines and a surface area of the body having at least one of the lines as a boundary,
wherein the at least one light emitter is configured to illuminate the first line to exhibit a first light emitting behavior and illuminate the surface area to exhibit a second light emitting behavior different from the first light emitting behavior, and
wherein the first light emitting behavior differs from the second light emitting behavior in temporal pattern of emitted light such that a first temporal light pattern of the first light emitting behavior is anticyclic to a second temporal light pattern of the second light emitting behavior.