Re: GB for OEM Laser Systems protective eyewear
But OD1.5 reduces light by a factor of 10^1.5=31.6, and 500mW / 31.6 turns out to be 15.8, which is still above the Class IIIa limits and not safe (or is my understanding of OD or "safe" messed up)?
Also, the reason I want both in one goggle is to...