That scribbled plate, whatever it is, is an old friend, someone spotted him on the forum some time ago.
I was looking for diagrams of how an optical printer works, but so far I haven't found any.
I wonder if there was any place where a little sheet of acetate might have fallen, and it wasn't spotted because the writing was done with a weak marker. But it showed up in the picture because it shone trough the helmet's white.
It's obviously a different layer to the laser bolts, because it just stays there, stationary.
JEDIT: My mind was almost working there, it was Harmy that first spotted the marker scribbles: