Hello, i have this strange problem with my green laser pointer. So, when i use it the dot is very bright at first. After a while the dot is so small. What could be causing this?
Problem is you bought a crappy laser and its normal. It isnt a problem, its normal. Buy crap and get crap for performance. Welcome to lasers, lasers are NOT cheap
hard to say without a video but if performance is better when warm it sounds like it's just a result of the DPSS process and it being particularly unstable on your laser. On all my DPSS greens I see a short burst of power when I first push the button and then a reduction, much worse if cold, but only really noticeable on the pen lasers. Higher quality lasers don't seem to be affected as much and can still be quite stable.