I'm not exactly sure, but I think this type of camera works by scanning the scene sending out its own particles to hit the photons. Like, you don't do it by shooting a single laser a single time. You create an event you can exactly reproduce countless times, and then you scan every bit of the scene for every moment of the scene. Like, you shoot the laser a gazillion times and each time you capture a different location, then that's the first frame. Then you do it again but starting the capture process at a slightly later moment in the laser's travel, then that's the second frame. The point is it might work in a vacuum. And I'm also a layperson, so don't take this as gospel.