公开(公告)号：US20220096168A1

公开(公告)日：2022-03-31

申请号：US17485081

申请日：2021-09-24

Applicant: Northern Digital Inc.

Inventor： Shaulaine White ,  Elsabe Coetzer ,  Larry Chen ,  Athanasios Tommy Balkos

IPC: A61B34/20 ,  G06F3/03 ,  A61B90/00

Abstract: A marker for an optical tracking system includes an object having a curved surface and a plurality of beads adhered to the curved surface with an adhesive. The beads of the plurality of beads are configured for being retroreflectors. A bead of the plurality of beads can include a first portion having a reflective surface and a second portion that is substantially transparent. The first portion of the bead is oriented toward the curved surface of the object. The second portion of the bead is oriented away from the curved surface of the object. The beads are applied to the marker. A bead of the plurality of beads can be transparent and embedded in a reflective medium on the marker surface.