Holograms And Holography

8 Pages 1985 Words

I. Introduction
Holograms are objects that exist in a two dimensional state, but can be perceived by the human eyes to be in a three dimensional state. They make you want to reach out and touch it, but only come to find this two dimensional object. This is the entire purpose of a hologram, to convince the human eye that there is an object where one does not exist.
Holograms have been a known technology for a while, but understanding how they work is a whole other story. You hold a hologram up to yourself and look at it thinking, “Am I seeing things?....Is someone pulling a Jedi Mind Trick on me?….Is there really an object there?” How is this possible? This paper will cover how this is possible and various other aspects of holography.
II. Creating Holograms
A. The Idea
Holograms are kept on a holographic film sheets. This film is similar to regular photography film, only with special properties in its chemical make up that allow multiple different angle patterns to be recorded onto the film. The film does not record light waves. If it recorded light waves, then it would be nothing more than photographic film. What is of interest about this hologram film is collecting interference patterns of light. After this pattern of interference is recorded onto the film it can be called a hologram. The film acts like a lens after it has been developed with the interference pattern of the object you want to create a hologram of. This lens stores the information about the object like the data stored on a computer, except in this case it is stored as a pattern of interference on the film. When light is passed through this “lens” it uses a process of diffraction upon the recorded interference pattern to reproduce the object recorded. This effect can be achieved by either reflecting light from the surface of the film, or shining light through the film from the opposite side. Metallic films require that you reflect the lig...