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Practical Holography, 4th Edition by Stanislovas Zacharovas, Graham Saxby

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Chapter 12

White-Light Transmission Transfer and Rainbow Holograms

‘Why,’ said the Dodo, ‘the best way to explain it is to do it.’

Lewis Carroll

Alice in Wonderland

As a general rule you can’t produce a viewable image from a transmission hologram using white-light illumination. This is because the emulsion is not thick enough for the Bragg condition to limit the bandwidth of the image-forming light sufficiently. The fringe planes, being through the depth of the emulsion rather than parallel to its surface, don’t have the wavelength selectivity that they have in a reflection hologram. The result is an image that is merely an uncouth spectrum in which one can vaguely detect the shape of the subject matter.

But that would be possible if the subject ...

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