The objective of this apparatus is to demonstrate transmission holograms in class room and laboratory.

Fringe pattern in the hologram appears meaningless to the naked eye. However, it has the property of recreating the object beam's wavefrontwhen it is illuminated with a beam of light coming from the same direction as the original reference beam. When a viewer looks at the illuminated hologram, sees the wavefront and interprets it as if it were light coming from the original object. Unlike the case of a photograph, the threedimensionality of the original object is preserved by the hologram.

A5mW RED diode laser is used in this setup, which is the most common colour used for creating holograms. The laser beam is set at expanded mode, so that we can achieve full illumination in the plate and students can clearly see a 3-D image of hologram.