Surface-relief hologram

a hologram which all the details of the image are recorded as an interference pattern on the surface, rather than through the volume, of a material. The value of such surface relief holograms is that they can be mass replicated by mechanical transfer from a master...

Stereogram

a type of hologram prepared using the sequential images from a piece of movie footage. Each frame of the movie is converted into a vertical slit image and stacked against another slit image of the adjacent frame. The result is a hologram which, when the viewing angle...

Special effects

a whole range of optical special effects including Peppers Ghost, projection optics and image processing are combined to bring film footage of usually deceased celebrities (eg. Tupac Shakur, Michael Jackson, Robert Kardashian) back to life in an orchestrated...

Shim line

at some point in the hologram replication process, one or more metal shims need to be mounted around the circumference of a metal cylinder (the embossing cylinder). The point at which the shims join often produces a visible line in the resulting embossed film. This...

Shim

a thin plate of metal, usually nickel, which is attached to a cylinder in preparation for the embossing process. The shim is produced by an electro-deposition process whereby the plate with the recombined images is immersed into a galvanic tank and metallic nickel is...