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3D Stamps |
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These stamps from an Arab shiekdom called Umm-Al-Qiwain
(worth 1 something or other) were cheap and interesting to a kid who used to
collect stamps (that would be me when I was a kid). They were put in a
drawer and not seen for 15 or more years until today (in January 1999), when I
was looking for a good stamp to scan in for my email graphic on the front page.
These stamps have the same lenticular surface as 3D baseball cards, or those 3D
pictures you can take with the 3- or 4-lens cameras that you have to send off to
be developed and printed.
The process used (not invented here) was to place the stamp on the left side
of the flatbed scanner first to create the right eye image. Then, the
stamp was moved to the right side of the scanner to create the left eye image.
This process is described as the Scanner method in the
Taking section of this site in
detail. The basic concept is that the actual imaging device (CCD) is small
and in the middle of the scanner. The optics that reduce what you are
scanning to that CCD actually have a parallax problem that is exploited here.
You can also do this with any small 3-dimensional object.
