P3D Flaming Polaroids!

[John Toeppen <toeppen@xxxxxxxx>]

If we all knew everything we would not need to chat.  The human
condition is faulted.  Get used to it in ourselves and others. When we
flame we rarely gain the respect of others, in spite of how cleaver we
seem in our own minds.

I have made electronicly driven liquid crystal devices and they are
still magic to me.  There are so many variations it is hard to keep
track.  And I still don't know why the Kassan glasses show different
colors in the off position.  Perhaps one is normally open and the other
normally closed. 

Liquid crystal tunable color filters are made by Color Link and CRI -
these allow one to switch from R to G to B sequentially.  If you ad one
to a synced B&W color video camera you can take color pictures.  If you
place one in front of small a B&W CRT you can view those color images. 
Very neat stuff, but not 3D. Useful for "high resolution" color
microscope images using a 768x512 NTSC video camera.

Polarizer material (oriented polyvinylalcohol) is normally clear until
stained.  Traditionally iodine is the staining material.  The
"stereojet" process uses inkjet dyes as the stains.  Pick your color.
This is an extension of the old "vectograph" process used in celestial
navigation books circa 1943 by the US Navy. These were viewed with
polarized glasses.  You could use an iodine marker on unstained sheet
and write an image that would only be seen by one eye.  The other side
of the sheet had the opposite polarization, and you could write on it
and only see it with the other eye.  I have enjoyed the prints that have
been made using both the old and new methods.

John Toeppen
http://members.home.net/toeppen/


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End of PHOTO-3D Digest 3145
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