Mirrors, movement, dispersion lens, etc.
Yes, they all would work to a certain extent.
But with a powerful enough laser, the tiny defects of any of these defenses eventually fail.
The reason we don’t see these as battlefield weapons is that the power sources necessary are prohibitive.
I recall in one of these military laser stories a general asked a tech guy what would happen if they cover missiles with a reflective surface and then spin them. The tech guy replied with something like ‘Imagine the laser like a huge shotgun. Would spinning and mirrors stop a giant shotgun?’ I have no idea if that’s scientifically right or not.
FReegards