Re: [CAD_CAM_EDM_DRO] Re: Laser specs ? optics ?

--- Anders Wallin <anders.wallin@...> wrote:

> This migh be an urban legend, but I've been told
> that the CO2 (10.2um)
> will be absorbed by the cornea/lens, and the lens of
> the eye can be
> replaced with an artificial lens...(how does
> ackomodation work then?)
> A YAG (1064nm) beam will go through the cornea/lens
> and burn the retina,
> which can't be replaced (yet ;)
>
> still, it's best to wear safety glasses. the good
> ones are OD 9-10 at
> 1064nm.
>
> AW
>

I've heard the same thing, wouldn't want to try it. I
do know for a fact that plexiglass bicarbonates will
stop it. I check the laser mode which is the actual
shape and uniformity by shooting a 2inch thick clear
sheet of plexiglass for 1 sec intervals at 3000watts.
It vaporizes a hole a little over an inch deep and
about 1.25 diameter, this without a condense lens and
at a distance of 12' from the output coupler. We have
found that the use of a hair dryer or other air source
is a must on the target or you end up with a big
fireball. The dangerous part of a laser beam is not
the beam itself in flight as what it hits and the
amount of reflection. I'm thinking that the same
method could be used on smaller wattage CO2 lasers, I
doubt it would work the same on YAG or others as the
wavelengths are different.

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