Re: Laser pointers and reflective screens

[P3D Edward Hosey <ehh@xxxxxxxxxxxxx>]

You wrote: 

Norm Goldblatt writes:

> You know, laser pointers are polarized. So wouldn't it be fun to 
> split the beam into two, orthogonally polarized beams and then, 
> by adjusting the separation of the spots on the screen , you 
> could actually point out something in three dimensions!! I'll 
> give it a try and report back.

Both gentlemen I spoke with (when researching my concern about damaging 
my audience's eyes) assured me that the low-powered lasers used in 
pointers were *not* polarized and that the polarization is only done 
for high-power lasers (I have forgotten the explanation of why--but it 
made sense at the time).  At any rate, this was the opinion of two 
people in different organizations working with lasers on a regular 
basis...

Eddie
-- 
Eddie Hosey
ehh@xxxxxxxxxxxxx
Take a second--breathe deeply--and think about what you enjoy most in life.


------------------------------