- Jan 30, 2009
Albert what have you been smoking? It's obvious that nobody should ever just wave a laser randomly around the room.
Maybe we understand different things from the same sentence. I understand this means that they were a group of people and he was pointing it to dark zones, and the guy was afraid looking at the bright dot might have been harmful. People with blue or green eyes use to feel pain when looking to bright things, so I asumed this is what he described as "headache".waving it around in the dark
Except that of course that this is pretty much exactly what happens with disco laser shows. I'm not condoning reckless use of pointers, but we need to keep the risks in perspective. Laser injuries are almost invariably from multi-watt lasers in an industrial or military context. Injuries even from high power hobby pointers are vanishingly rare.Albert what have you been smoking? It's obvious that nobody should ever just wave a laser randomly around the room.
I doubt that it is valid to make the comparison in this way since you have to take into account the abiility of the eye (in particular the blood vessels in the retina) to dissipate heat. 1W for 1millisecond is thus likely to be more hazardous than 1mw for 1 second.what has disco lasers to do with this? Disco lasers are scanning all the disco at madly high frequencies, a hit in your eye from them lasts literally milliseconds.
One hit from 1W laser at 1Khz shoots in your eye the same energy than 1mW laser for 1 second.
Laser shows are pretty well regulated, I don't know what was your point.
I would not trust the blink reflex on 405. Bluray is so close to invisible that any blink reflect would be very slow or even not present compared to equal exposure to 635 or 532.dont worry even 200mw of blu ray reflected and thus unfocused may not blind you due to the blink reflex
405 is certainly much less visible compared to 532 (by probably a factor of 50). But a direct exposure to even a low power 405 would still look brighter than the sun and certainly enough to trigger the blink reflex.I would not trust the blink reflex on 405. Bluray is so close to invisible that any blink reflect would be very slow or even not present compared to equal exposure to 635 or 532.