Interference3D

[@thorsvedenborg3456]

May be what you see is a speckle pattern formed on the retina of your eye due to reflection of coherent beam from the rough surface of the screen. The speckle pattern observed like that would depend on the angle of observation and on the diameter of pupil and roughness of the surface.

[@martinsoos]

I would rule out roughness of surface, since I see it on many different surfaces. And I think we are talking about the interference that moves as we move. You can also produce the opposite by reflecting a laser against a wall. When the light comes back to the wall behind the laser, the green dots move in the same pattern as I move the laser. Like walking by one picket fence that is behind another.

[@YawnGod]

You should take two different color lasers and cross them and put the lens at the intersection, and then adjust what needs adjusting. Go big or go home, as they say.

[@martinsoos]

I tried, they don't overlap and the red, blue, and purple lasers I have are too dim. Ya, I just went home.

[@m.c.4674]

I see it too.