FoxTrax

FoxTrax, also referred to as the glowing puck, is an augmented reality system that was utilized by Fox Sports' telecasts of the National Hockey League. The system was intended to help television viewers visually follow the puck on the ice; it utilized modified hockey pucks containing shock sensors and infrared emitters, which were then read by sensors and computer systems to generate on-screen graphics to enhance vision of the puck for the television audience, such as a blue "glow" around the puck, and trails to indicate the hardness and speed of shots.

The system was first used during the 1996 NHL All-Star Game, and was used until the end of the 1997-98 season. FoxTrax received mixed reviews from viewers and critics; although some viewers thought that FoxTrax helped them follow the game easier, the concept was criticized for distracting from the game and being a gimmick.

In 1994, Fox won a contract to broadcast NHL games in the United States. David Hill, the head of Fox Sports at the time, believed that if viewers could easily follow the puck, the game would seem less confusing to newcomers, and hence become more appealing to a broader audience. Hill pitched the idea to Rupert Murdoch, who approved the development of FoxTrax under electrical engineer Stan Honey. The FoxTrax puck was first used during the 1996 NHL All-Star Game. It was last used during the first game of the 1998 Stanley Cup Finals. Fox was scheduled to televise Games 5 and 7, but the series ended in four games. In August 1998, the NHL broadcast rights went to ABC, and FoxTrax was not brought back for the final season.

Fox has since used "FoxTrax" as a branding for other on-screen tracking graphics in other sports properties, such as a virtual strike zone during baseball games, and statistics displays during NASCAR events. They are related to the puck in name only.

...
Wikipedia