What is a Display Hologram?

What Colour is a Hologram?

A display hologram is a 3D print that has been recorded using laser light onto a specialized photographic plate or film resulting in a true three-dimensional image of the original subject. Unlike other 3-D techniques, holography allows the creation of true full-parallax 3-D images of astonishing detail.

The systems depicted in this web-site  produce two principal types of hologram:

• Transmission Holograms

• Reflection Holograms. 

Simply speaking transmission holograms are viewed by the transmission of light as in the viewing of a photographic slide. Reflection holograms are viewed by the reflection of light as in the viewing of a normal photo (see below).

Reflection holograms produced by the systems described in this web-site are generally monochromatic. The hologram colour may be adjusted chemically  from blue right through to red. The spread of colors may also be adjusted using chemistry giving a variety of pleasing visual effects.

Transmission Holograms produced by the systems described in this web-site are what are known as Rainbow Holograms. The perceived colour of a rainbow hologram changes from red to blue as the height of the viewer's head changes. 

Both transmission and rainbow holograms may be generated digitally with Geola's Digital Option.

Is Special Lighting Required for Viewing Holograms?
No - optimal viewing is obtained by simply illuminating the final display hologram with a standard halogen spot lamp.

Pictures showing replay of a reflection (left) and transmission (right) hologram employing a common halogen spotlight