On Feb 18, 12:12 am, Quixotic Nixotic <[email protected]> wrote: > Instead of the original glass front strip it had some backlit cheesy > semi-clad mexican dancing ladies using those ribbed pictures that > change as you move (do they have a name?).
It's called "lenticular" motion effect or lenticular 3-D, depending on which effect is used; both work nearly the same way. Some products even combine both effects to produce a moving 3-D scene. Each vertical rib is actually a long, thin lens (like a bar magnifier, if you know what that is) and will magnify a very narrow strip of what's behind it greatly in width. The catch is, as your viewing angle changes even slightly, the strip that you're seeing changes position fairly drastically, just like the old alcohol-filled thermometers, with the super skinny capillary tube partly full of red-dyed liquid, that suddenly appears as a very readable wide stripe if you stand facing exactly perpendicular to the face of the thermometer. In the common lenticular motion effect, by interleaving several strips taken from different images in the same sequence behind each lenticular lens, the magnification effect lets you see each lens as being filled to its entire width with a little piece of the same image even though the actual bit of print you're seeing is really only a small fraction of the width of the rib. By changing your horizontal viewing angle, your view through all of the lenses in the panel shifts to the next strip in sequence behind each lens, and it seems as if the whole picture has suddenly changed. For the 3-D effect, the relationship between the printed strips and lens ribs and the geometry of the ribs themselves, are made somewhat differently so that each of your eyes will see a different strip in the sequence across the panel, and the printed strips are made from several different views of the same object or scene. For example, the simplest 3-D lenticular images typically use 5 different views of the scene. Looking directly at it from the proper distance, your left eye may see view 2 while your right eye sees view 4. Shifting your position a bit will let you see views 1 and 3, or 3 and 5. but if you move too far off-axis, you may see views 5 and 2 (for example), and lose the 3-D effect, or even invert it. Some 3-D lenticular images use strategically placed black strips so that by moving too far off-axis, the image simply blacks out. A.J. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
