I bought 2 638nm red laser modules. one was 500mw and the other one was 700nm.
Both of them had an issue.I discovered focusing problem from laser modules.
The dot won't be focused, get bigger and bigger as further from laser module.The beam spreads a lot too.
I couldn't solve this problem If I've tried change focusing lens and cleaning lens, laser diode a lot.There was nothing to be changed, how could it be solved for?
Both of them had an issue.I discovered focusing problem from laser modules.
The dot won't be focused, get bigger and bigger as further from laser module.The beam spreads a lot too.
I couldn't solve this problem If I've tried change focusing lens and cleaning lens, laser diode a lot.There was nothing to be changed, how could it be solved for?