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Re: TDC vs. Triad - Stereo Projectors


  • From: P3D Greg Erker <erker@xxxxxxxxxxxxxx>
  • Subject: Re: TDC vs. Triad - Stereo Projectors
  • Date: Thu, 11 Sep 1997 15:55:41 -0600


>Was it actually concluded that "harmful radiation" falls upon the image
>w/o having a polarizer to protect it?  I recall it being more like
>"just in case there is a problem, having it polarized seems a safer bet".

  For the same screen brightness having the polarazers
before the slide will expose them to less light than
having the pol's after.

  The typical polarizer passes 38% of the light, so
a system with the pol after the slide will expose
it to roughly 2.5 times as much light for systems
that have the same screen brightness.

Greg E. (I don't own any projectors :(



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