Smart holograms

Have a great holography link? Post it here so we can all use it.
Locked
MichaelH

Smart holograms

Post by MichaelH »

If I'm not very much mistaken, this is what Jeff's been working on.

http://www.economist.com/displaystory.c ... d=10678842
However Smart Holograms, a small firm based in Cambridge, England, has found a way to store not one, but two holograms in a single piece of photosensitive material. The material is a type of superabsorbent synthetic polymer, called a hydrogel, that contains silver halide grains of a sort used in many photographic processes. The hydrogel itself swells and contracts, depending on how much water it contains. In its swollen state it produces one image; in its contracted state, the second.
Locked