Considering that laser pointer weapons have minimal recoil and you do not have to guide the target, it has been proposed that laser weapons are suitable for space operations. Will there be any countermeasures for this weapon? There are many science fiction novels about space lasers. I would recommend the series to learn how to attack/defense lasers.
Lasers cause damage by allowing the targets they hit to absorb laser energy. So just avoid absorbing energy. Hitting something in space depends on the time the target must move away compared to the speed at which they move away. Get close enough that they can move away, and far enough you need to guess where they are.
Countermeasures include avoiding or reflecting the laser when the distance is far enough to reduce damage. There are also various sci-fi options. Why don't we use laser guns instead of kinetic energy weapons? Guns are very effective in killing things. Their operating costs are relatively low. The power source required by the laser is currently not portable. Even in the distant future, guns are most likely to be used because of their low production and operating costs. The project has been completed.
Only tools and loading equipment machinery, namely lathes, milling machines, rifling machines, reloading presses, molds, powders, etc., require mass production. With the exception of my autoloader, I load all the ammunition at home, which is a little harder than my rifle and revolver. I just don’t have time to fool those who are my only excuses for not doing the same thing with 9mm and 0.40 S&W.
If I point the green laser pointer at a very fast rotating mirror, will this have any effect on the reflection of the laser or will it not be affected in any way? All this depends on the shape, surface, direction and direction of rotation of the mirror.