🚀 go-pugleaf

In article <DLBRES10.90Sep20174906@pc.usl.edu>, dlbres10@pc.usl.edu (Fraering Philip) writes:
> In article <30638@nigel.ee.udel.edu> berryh@udel.edu (John Berryhill) writes:
> 
> jb>Followup-To: sci.garbage 
> 
> (nice try)
>   
> jb>In other words, let the HeNe stay on all the time and use something
> jb>in beam path that can either deflect the beam (an acousto-optic
> jb>modulator for instance) or vary its opacity (an LCD window with a
> jb>polarizer crossed wrt the LCD).
> 
> Isn't the laser beam polarized already?

Only some lasers are polarized.  How do they polarize a HeNe laser?  simple.
Put a small pirce of polarized glass (for lack of a better term..) in
the beam path.  (very thin, very high quality).  Take a look at any Edmund
catalog... only about half of the lasers they sell are polarized.

Most modulated lasers use something that sticks right inbetween the
power supply and the tube, thus modulating the intensity of the beam.
(I think..)
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