Holography

Holography is a technique for recording and reconstructing three-dimensional images using lasers and photographic plates or water. It works by capturing the light waves scattered from an object and encoding them onto a medium.

The Process

• Recording: A laser beam is split into two parts: an object beam and a reference beam. The object beam illuminates the object, while the reference beam is directed at the photographic plate.
• Interference: The light waves scattered from the object (object beam) and the reference beam intersect at the photographic plate, creating an interference pattern.
• Encoding: The interference pattern is recorded on the photographic plate, or other medium, encoding the light waves scattered from the object.
• Reconstruction: When the recorded plate is illuminated with laser light, the encoded light waves are reconstructed, creating a three-dimensional image of the object.