ELECTROMAGNETIC TRACKING WITH AUGMENTED REALITY SYSTEMS

Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM em...

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Bibliographische Detailangaben
Hauptverfasser:	BUCKNOR, Brian, RYNK, Evan Francis, WOODS, Michael, PALMER, James William, ALY, Aly H.M, LOPEZ, Christopher
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AMUSEMENTS ANALOGOUS ARRANGEMENTS USING OTHER WAVES APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING,CLIMBING, OR FENCING BALL GAMES CALCULATING CARD, BOARD, OR ROULETTE GAMES COMPUTING COUNTING DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC DIGITAL DATA PROCESSING GAMES GAMES NOT OTHERWISE PROVIDED FOR HUMAN NECESSITIES INDOOR GAMES USING SMALL MOVING PLAYING BODIES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION SPORTS TESTING TRAINING EQUIPMENT VIDEO GAMES
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Beschreibung
Zusammenfassung:	Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and/or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.