Recording and reconstruction of holograms

Principle

In contrast to normal photography a hologram can store information about the three-dimensionality of an object. To capture the three-dimensionality of an object, the film stores not only the amplitude but also the phase of the light rays. To achieve this, a coherent light beam (laser light) is split into an object and a reference beam by being passed through a beam splitter. These beams interfere in the plane of the holographic film. The hologram is reconstructed with the reference beam which was also used to record the hologram.

Tasks

1. Record a laser light hologram and process it to get a phase hologram. Reconstruct it by verifying the virtual and the real image.
2. Record a white light reflectionhologram and process it to get a phase hologram. Laminate it for reconstruction by a white light source.

What you can learn about

• Object beam
• Reference beam
• Real and virtual image
• Phase holograms
• Amplitude holograms
• Interference
• Diffraction
• Coherence
• Developing of film

Literature for this article als follows

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