Green 5mw laser pointer problem

[j0ku]

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?

 

[TimTom]

maybe a problem with the driver.. but i think your problem are the batteries. ;o

 

[Livinloud]

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

 

[j0ku]

Hmm strange, when it heats up then it works perfectly.

 

[mortuus]

do you use it out in the cold? its normal if its a bit cold they need heat up before work proper.

 

[Zeebit]

Hmm strange, when it heats up then it works perfectly.

Normal. These lasers work best within a specific temperature range.

 

[trencheel303]

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.

 

[j0ku]

maybe a problem with the driver.. but i think your problem are the batteries. ;o

Oh, just changed the batteries and it works without needing to warm up.

By the way, thanks for all replies!