Couple of students were just in my office- they are trying to get an
advertising business started and they want to use poster size images
which show different images from different angles (as you move
realative to the poster you see different images). They also have a
sample that has apparent depth (a real image floating in front of a
background image)- very striking to see. This technique is available
commercially but they want to make their own. The ones they showed me
have Frensel lens like grooves on the front surface only all parallel
(not concentric like a Fresnel magnifying lens). They want to know
exactly how to place the image(s) on the back so that you get the
double image effect. Anyone know how this works? I know this is a
diffraction effect but I don't see how to get different images.
kyle
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No one ever reached death's door and said:
"Darn! I should have gone to more meetings."