8 Holographic Displays
8.1 Introduction
Holographic displays are in widespread use and often aspire, sometimes successfully, to become an art form. Small display holograms are used to provide additional authentication for a wide variety of articles including credit and debit cards, banknotes, passports, licences, and concert and theatre tickets as well as consumer goods. Large-format holographic displays are also widely used in advertising. There are two main classes of display holograms: those which require laser light to view the image and those from which the image can be reconstructed using white light. The former usually produces the most striking images, but obviously the need for laser light imposes significant ...
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