Quoted from Zitt:

That doesn't jive with my understanding.
So your saying; that OSHA would not care about the bar employee serving drinks to "players" in a bar? Or than janitorial staff? or the random vendor on premise?
I'm not saying *IN THIS CASE* they would care. That said; OSHA has complained about some trivial stuff before... so; no, I don't believe at all that this QR code reader could not be a source of issues for the pinbar operator.
To the others; no, I haven't seen this QR reader in person and probably wont for the foreseeable future.
That said; others here have voiced concerns - so, it probably is a concern. After Ball 1 is finishes - Stern needs to turn off the reader until Last ball drains. Solves the problem for all parties.
I legitimately didn't know if its a laser or a LED; hence, the reason I asked.
Super bright LEDs directly in the eye aren't as bad as lasers; but they aren't trivial either. I'd be amazed if OSHA didn't have some rule about the Coherentancy of light vs power vs distance.