Elenco Snap Circuits® Deluxe Sound & Light Combo - Manual (Page 91)

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Project 180 3D Pictures
These pictures contain separate red &
blue images, taken from slightly different
viewpoints, combined together. When
you view them through the red & blue
filters, each eye sees only one image.
Your brain combines the two images
into the single picture that you “see”, but
the differences between the two images
make the combined picture seem three-
dimensional.
How 3D works:
Most people have two eyes, spaced
about 2 inches apart. So each eye sees
the world a little differently, and your
brain uses the difference in views to
calculate distance. For each object in
view, the greater the difference between
the two scenes, the closer it must be. If
you close one eye, you will have a
harder time judging distance – try
catching a ball with just one eye! (Be
sure to use a soft ball if you try playing
catch with one eye.)
When you watch a 3D movie in a
theater, you wear 3D glasses so that
each eye will see a different image. The
movie screen actually shows two
images, and the glasses filter them so
that only one image enters each eye.
Most movie theaters use polarized
images and glasses with polarized
lenses, so that each eye sees a different
image.
Another way to make 3D is using red &
blue images, then view using glasses
with red & blue filters, as you are doing
in this project. Unfortunately this method
does not give you the color quality that
the polarization method has.
Look at the pictures here; they probably look blurry. Now place
the red filter in front of your left eye and the blue filter in front of
your right eye, and look at the pictures again. Now the pictures
look clearer, and you can see them in three dimensions (3D).
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