Holography is the technique of creating holograms - that
is special kind of images on 2-dimensional surfaces that create the effect of 3
dimensional objects.
The basic principle of holography is
to create the image using two simultaneous beams of light, that interfere with each
other to form a complex image on a suitable photographic film. These two beams of
lights are created by splitting a light source in two with one source reflecting light
from the object to be photographed on the film and the other falling directly on it from
the source. The image developed in this way is the hologram. The light source used for
holography is usually a laser light.
When light from any
source falls on the film hologram, it changes this light to reconstruct the light
pattern of original object, creating a three dimensional image.
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