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

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Chapter 17

Achromatic and Pseudocolor Holograms

A large rose-tree stood near the entrance of the garden: the roses growing on it were white, but there were three gardeners at it, busily painting them red.

Lewis Carroll

Alice in Wonderland

Achromatic White-Light Transmission Transfer Holograms

In the previous chapter, we called an image without color “black and white” as used in photography. Here, we shall be introducing the more rigorous term achromatic, derived from the Greek and meaning “colorless.” An achromatic image is an image that appears in shades of neutral gray instead of being in a single spectral hue (“monochromatic”). For transmission images, we shall be using the term white-light transmission (WLT) hologram, as the term “rainbow ...

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