Yeps, I've already check these pictures... It looks like he tried to reproduce the display (360° panorama vision) of the famous GH-28 model (Galaxian³ for 28 players, see
here), but I don't really understand which source has been used for this test? I would say he used one static picture, that one
...and display that picture, divided by 16 and projected into that 360 concave lens/mirror, and this is the result
Maybe some Japanese Galaxian³ experts here may translate 'that experiment' in English?