center of laser is center of laser. Not bending

Not how this works.

measured in micrometers

Seriously? Why do you say things you know nothing about? You're just a jack-ass the type of guy who claims knowledge but you're just an uneducated tool. Support your statement with facts. For my statement see: https://en.wikipedia.org/wiki/Beam_divergence

experiments confirming this science, over and over.

No, there isn't.

And some people have used targets,

Show me.