Polariscope

To: neon-l@netcom.com
Subject: Polariscope
From: sandie@almaden.ibm.com
Date: Tue, 20 Feb 96 10:06:01 PST
Reply-To: neon-l@netcom.com
Sender: owner-neon-l@netcom.com

Kenny writes:
>John, I think you get the award for the first sucessful ascii drawing of 1996!


I second that! Nice job!!

John writes:
>I have about a 6" space between the two sheets, which are sandwiched
>between glass for durability.  If the two polarizing sheets are
>perpendicular, then they cancel out the light from below.  Strain in glass
>defracts this light, showing up as bright-white streaks & patterns.
>
>

I've made a polariscope pretty much like what John described.
The project was for a kinetic sculpture on strain in glass for
some school kids. I wanted a little more flexibiltiy on viewing
the various colors, so I sandwiched the top piece of polorizing
sheet (marked "camera store" on John's drawing) between two pieces
of plate glass in a 4"x6" picture frame. Then I screwed a wooden
handle from an old wood carving tool on the bottom part of the frame
to hold the piece while viewing the glass.
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                  (       )
                   (     )
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                   |     | *My drawing isn't as good as
                   |     |John's, but I think you get the
                   |     |idea.**
                   |     |
                   (_____)


    Have fun!
         Sandie