>>106265916
>What is the impact on human eyes?
IR is just as capable, if not more so, at destroying human retinas compared to visible wavelength laser light. If anything, they don't trigger the reflexive blink that visible laser light triggers, so you could be damaging your retinas without even knowing it from a stray reflection.
It's a particular concern of poorly manufacturered 532nm wavelength lasers that you can buy from Amazon, as the process for forming even a weak beam of visible green light involves an IR diode hundreds of times more powerful than the output of the resultant beam. And at even somewhat cold ambient temperatures, the crystals that convert the wavelength can let IR light pass, releasing damaging, but practically invisible light out into the environment.
t. I build lasers for fun