The plastic 3DIQ viewer was first
manufactured by the XM Corporation in Rochester, New York, USA in 1999.
The model shown below is known as the Premier 3D Viewer, but there were
also folding cardboard viewers available. The product was primarily
marketed as an economically priced toy and children's educational aid,
but it was also intended to be used as a business promotional tool. The
stereo views, referred to as 'trading cards', came in packs of 20. Each
set had an explanatory booklet included.
HOW DOES IT WORK?
 The 3DIQ Viewer uses a really unusual method to obtain a 3D image. A
card with one half of the stereo pair printed on each side is slotted in
to the viewer from the top. The images are then reflected from the side
mirrors onto the mirrors on the back wall of the viewer and are subsequently
viewed through the lenses. Light enters the viewer through the clear
plastic top.
A couple of 'Trading Cards'.
Use 'parallel' or 'cross eyed method'
of viewing to see the stereo effect.
 
Each set of cards included a Fact
Book
The device is covered by Patent no.
5517355, which was originally placed in November 1994 by Katharyne
Sullivan and John R. McCart under the title 'Card adapted for use in
stereoscope'.
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