In a multi-beam hologram, you get the benefit of higher resolution from the single beam techniques. You can also make bigger hologram, change where the illumination is coming from, and other things. Multi-beam holograms are reflection holograms and as such they can be viewed in normal light. In this setup the beam is split by a (can you guess?) beam splitter. The beam splitter (”BS” in the diagram) splits the beam and half goes through, the other half is reflected. One of the beams is projected directly onto the holographic plate. The other beam is shined on the object and reflected onto the plate, making the pattern. This kind of hologram is developed just like the other kinds of holograms that have been presented so far.
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