Rainbow holograms

Other classes of holograms also exist, such as polarization holograms, rainbow holograms, synthetic holograms, and computer-generated holograms. However, these are specialized topics that are best dealt with separately from the central concepts of holography. 

The first form of thin transmission hologram that can be viewed in white light, the rainbow hologram, was developed by Benton in 1969. Another form of hologram that can be viewed in white light, the multiplex hologram, was produced by Cross in 1977. 

In 1968 electrical engineer Stephen Benton developed the rainbow hologram-as the observer moves his head, he sees the spectrum of color as in a rainbow. This type of hologram can also be viewed in white light. 

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