Holography

Holography is the technique of optical recording by examining the patterns of light waves that are scattered from an object and then using that information to reconstruct a three-dimensional replica image.

The image offers the ability to be viewed completely in 3D from many angles and even stereoscopically. The process depends on the interference of the scattered monochromatic light and another reference beam which are brought together at the point where the hologram is recorded onto the medium. Re-illumination of the recording with the reference beam reveals the holographic image.

Usually long coherence length monochromatic light is required for effective holographic recording. Stable single frequency lasers are therefore a necessity. KLASTECH lasers, inherently designed to generate such light with coherence lengths in excess of 100m in most cases are ideal for these applications.

Holograms have been used over the years for art, entertainment, security and high density optical recording.