Re: PHOTO-3D digest 1264

[P3D Jim Roberts <xjim@xxxxxxxxxxxxxxxx>]

>From: P3D William Carter  <wc@xxxxxxxxxxxxxxxxxxx>

>A couple of guys who worked for Techtronix, Dennis Hall and Philip 
>Johnson, got a patent last year for some color inks which reflect 
>oppositely polarized light. Their claim is that a single full color 
>print can be made using this stuff to render a stereo picture.

I haven't seen anything about this before, but if true, it sure has
possibilities!  However, my mind boggles at trying to imagine the 
technical details.  Years ago, at Expo '74, in Spokane, WA, I saw a display
which included a painting of a landscape that appeared to be a winter scene,
an autumn scene, or a summer scene, depending on what frequencies of light
illuminated it (I believe they used broad spectrum white, UVA and UVB.)  Has
anyone seen this?  I thought it was mighty cool.

Regarding the stereo print, I suppose that if one gave up any hope of
viewing the print without polarizers, that it would not be too difficult,
technologically, but without the polarizers, the print would be pretty
distorted (place the left and right chips of a Realist pair over each other
and view the resulting image, or just view an anaglyph without filters.)  I
would hope that it would be possible to open a book and see 'flattie'
pictures, but reveal the relief by donning a set of polarizers.  This gets a
little trickier to implement, I am sure.  I, too, would love to hear more if
anyone has details.
-------------------------
Jim Roberts   xjim@xxxxxx
    Texas Instruments
-------------------------


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