Class 4 lasers produce very strong beams. The properties of this laser are significantly different from ordinary light, such as that emitted by ordinary flashlights. Lasers (also laser pointers) are classified according to the European standard EN 60825 according to the emitted radiant power. Cats' eyes are more sensitive to light, and the beam of a high power laser pointer can damage them much faster than human eyes. You can't generalize. Under no circumstances should you point the laser pointer directly into the cat's eyes, this also applies to flashlights (especially LED lights) as there is also light bundled here.
How far can a high-power laser pointer go?
Do you really know how far such a powerful green laser pointer can go? Because about 50m. We did a recent attempt and at 15 miles we could still see a bright red blob with nothing nearby. 40km will be in it or more. Like I said, a laser pointer. It would be cheaper to buy a 10mw laser pointer that can be left on or off at the push of a button (or if you can't find such a laser pointer, just add another switch) and simply build one that fits it the small housing that you attach to assemble the saw
The 500mw laser pointer goes further, but the beam is more visible on the blue laser pointer. The fact that green continues to glow is simply due to the poor beam quality of the blue laser. This doesn't produce a real point, but a small line. Laser pointers are used for a variety of purposes, such as visual aids, balloon popping, matches and torches, military use or just for fun. The price is very affordable, the quality is guaranteed, more similar products suggest 300mw laser pointer.