ok
Thank you very much for this explanation very clear now I understand
but this is not really necessary to have a filter or better to have one?
Thank you for all your information that I'm pretty boring I always ask a question.
Thank you for everything.
It's better to have an
Infrared filter, so you know that
all of the laser light (power) is just
Green light. For powers less than 50mW, you don't really
need an
IR filter. For powers greater than 50mW, you want an IR filter because of the the higher quantity of IR light.
A 100mW
Green without
IR filter can have as much as 25mW of "invisible laser radiation" that can damage your vision.
Example: Last year, I got one of my first +100mW
Green lasers, and it did not have an
IR filter. I was using
these safety glasses while ignighting matches and burning wood around the house, but the safety glasses only protect against
Green, and I noticed that my eyes were actually aching after only a few seconds of looking at the point of "burning".
I then ordered
these safety glasses that protect against
IR and Green, and my eyes no longer hurt when burning with my non-
IR filtered
Green lasers.
So, either purchase a laser with an
IR filter, or purchase safety glasses with
Green and
IR protection.