Take one Round Silver Christmas Tree Bauble circa. 60mm and one simple ordinary webcam camera.
Mount the Camera pointing up at the ceiling (or Heavens).
Place the bauble Circa. 150mm above the Camera and Hey Presto you have 360° field of View.
The arrangement can be reversed depending on "Point of View".
Ok its distorted but should be enough to detect IR signals (look at the ceiling light for example).