"photographic works" means artistic works created by recording images of objects on light-sensitive or other materials with the aid of devices;

And then further you put some recording device, which in those days was a photographic plate, far across a room. So you take a tiny, tiny Angle and you go far enough across the room.

The method comprises the following steps: recording a required pattern onto a photographic plate through laser holography and manufacturing an optical mask plate with the holographic pattern;