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image that changes with viewing angle

a simple method of making a picture that changes with viewing angle
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Lenticular prints display a different image depending upon the angle you look at them.

To form a lenticular print, two images are interlaced and then overlayed with a lenticular lens screen.

The problem with lenticular printing is the need for a lenticular lens screen. It'd be good if the same effect could be achieved without the need to overlay a screen.

I propose a simpler method of forming a lenticular effect. Basically this would involve an array of closely spaced coloured dimples pressed into a surface. The dimples would be coloured such that different images would be formed depending on the angle at which the surface is viewed. see illustration.

This could be manufactured with by colour debossing (the reverse of embossing).

Admittedly this is a pretty obvious invention, but I couldn't find an example on the internet.

xaviergisz, Aug 21 2007

illustration http://imgur.com/a/d6m6c
[xaviergisz, Aug 21 2007, last modified Dec 13 2011]

Not the same as this, but interesting... http://www.yunghologram.com/
3D display from a color printer, no laser needed [ldischler, Aug 21 2007]

[link]






       I've seen this with 2D arrays of embossed prisms, but not with dots.
ldischler, Aug 21 2007
  

       they dimple out, not in, huh? that is essentially what i imagined when you described this idea. hard to believe it's not baked. needs trying. i was thinking if you colored each peg (dimple) differently on different sides of its dimple you would get a different look as you moved 180 around the perimeter of the art. means you could view art not just from in front or below, but all around, up, down, side to side... fascinating.
k_sra, Aug 21 2007
  

       If you used pegs rather than dimples, coloured them with a full spectrum round the edge (red, magenta, blue, cyan, green, yellow, red) and allowed them to be rotated then you could create your own image which could only be viewed from one angle. From all other angles it would be the same image but a different hue.   

       Nothing to do with this but quite cool.
miasere, Aug 21 2007
  

       you will need a media that can be deformed sufficiently to make a dimple deep enough to allow multiple viewing angles which would mean some sort of plastic, also you would need some pretty small dimples(im thinking 1 dimple per pixel) Also what would it look like from strait on? if the dimples were hemispherical as opposed to cylindrical?   

       Another concern would be paralax errors depending on the viewing angle and distance.
jhomrighaus, Aug 21 2007
  
      
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